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== "Formats" section must be dismantled ==

This technical section dominates the article. Per [[Wikipedia:Summary style]], most of its detailed content must be moved into the (already existing) "main" articles:
{{main|Floppy disk format|List of floppy disk formats}}
While the section "Formats" here must give a summary/overview without digging deep detail. [[User:Muslim lo Juheu|Muslim lo Juheu]] ([[User talk:Muslim lo Juheu|talk]]) 15:55, 29 July 2011 (UTC)

: A belated strong agreement. My suggestion is that the commercially dominant formats be retained with all failed and obscure variants be moved to [[Floppy disk format|List of floppy disk formats]]. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 18:27, 20 January 2012 (UTC)

== Duplicate paragraph about legacy ==

The second paragraph under [[Floppy_disk#Current_use]] is almost identical to the one under [[Floppy_disk#Impact_and_legacy]]. The second occurrence features an image with a floppy disk as a 'save' symbol. I don't know if that adds anything to the article, otherwise I would suggest deleting the legacy section, as this seems a bit separate from the rest of the article. Marcus, [[Special:Contributions/85.178.23.125|85.178.23.125]] ([[User talk:85.178.23.125|talk]]) 14:39, 18 August 2011 (UTC)

Deleted coercivity info. It was wrong and not on the footnote (indeed no relevant info was there)
Am looking for correct info.
IIRC 5.25" SD or DD, I don't remember which, were 300 Oersted; 3.5" DD were 600 (look for Microfloppy Industry Committee proposals) and HD and ED were even more. This poor info throws the grain size and chemistry info into question. Can't find or recollect anything on that datapoint, however, with the exception that I do recall it changed, along with coating thickness.

== Deleted coercivity info ==

Deleted coercivity info. It was wrong and not on the footnote (indeed no relevant info was there)
Am looking for correct info.
IIRC 5.25" SD or DD, I don't remember which, were 300 Oersted; 3.5" DD were 600 (look for Microfloppy Industry Committee proposals) and HD and ED were even more. This poor info throws the grain size and chemistry info into question. Can't find or recollect anything on that datapoint, however, with the exception that I do recall it changed, along with coating thickness. <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/69.86.252.239|69.86.252.239]] ([[User talk:69.86.252.239|talk]]) 03:55, 14 December 2011 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->

Update
More source links:
http://www.retrotechnology.com/herbs_stuff/drive.html
http://books.google.com/books?id=KSQEAAAAMBAJ&pg=PT43&dq=coercivity&hl=en&ei=shzoTqKBOuje0QHtg92KCg&sa=X&oi=book_result&ct=result&resnum=2&ved=0CDwQ6AEwATgK#v=onepage&q=coercivity&f=false
http://books.google.com/books?id=kawCnk4051wC&pg=PA156&dq=coercivity&hl=en&ei=shzoTqKBOuje0QHtg92KCg&sa=X&oi=book_result&ct=result&resnum=8&ved=0CFQQ6AEwBzgK#v=onepage&q=coercivity&f=false
http://books.google.com/books?id=ly8EAAAAMBAJ&pg=PA39&dq=floppy+oersted&hl=en&ei=liDoTrfMBeft0gGG5sWSCg&sa=X&oi=book_result&ct=result&resnum=1&sqi=2&ved=0CEAQ6AEwAA#v=onepage&q=oersted&f=false
http://books.google.com/books?id=ly8EAAAAMBAJ&pg=PA39&dq=floppy+oersted&hl=en&ei=liDoTrfMBeft0gGG5sWSCg&sa=X&oi=book_result&ct=result&resnum=1&sqi=2&ved=0CEAQ6AEwAA#v=onepage&q=oersted&f=false
http://books.google.com/books?id=OHLMwBC--sgC&pg=PA26&dq=floppy+oersted&hl=en&ei=liDoTrfMBeft0gGG5sWSCg&sa=X&oi=book_result&ct=result&resnum=2&sqi=2&ved=0CEQQ6AEwAQ#v=onepage&q=floppy%20oersted&f=false
http://books.google.com/books?id=IDAEAAAAMBAJ&pg=PA25&dq=floppy+oersted&hl=en&ei=liDoTrfMBeft0gGG5sWSCg&sa=X&oi=book_result&ct=result&resnum=3&sqi=2&ved=0CEgQ6AEwAg#v=onepage&q=oersted&f=false

Values for 3.5" DD seem to be 600, 650, 665
The conflicting values indicate more research is needed. I'm guessing there's a spec and near spec implementations. Patent search anyone? <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/69.86.252.239|69.86.252.239]] ([[User talk:69.86.252.239|talk]]) 04:17, 14 December 2011 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->
:The specifications are likely in the ANSI, ECMA or ISO standards but it is a project to get them (some are free) but I am not sure it is worth the effort since this seems like TMI. If anyone really cares I think I can find them but again TMI [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 06:31, 14 December 2011 (UTC)

== Confusion over physical sizes and variants ==

"3½- and 4-inches (and Sony's 90 mm × 94 mm (3.54 in × 3.70 in) disk) " implies that there actually was a 3½" disk that wasn't the Sony design. What's colloquially known as 3½" disk is actually Sony's 90.00mm x 94.00mm design. <!-- Template:Unsigned --><span class="autosigned" style="font-size:85%;">—&nbsp;Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Welshie|Welshie]] ([[User talk:Welshie#top|talk]] • [[Special:Contributions/Welshie|contribs]]) 09:05, 20 September 2021 (UTC)</span>
:Actually the industry standard 3½-inch FD is different than the original Sony design although I think the overall dimensions were the same. Regardless of whether the shell or disk was dimensioned in mm or inches Sony and the industry has always referred to the medium as 3½-inch, see e.g., [http://www.bitsavers.org/pdf/sony/floppy/Sony_Micro_Floppy_Disk_Drive_Model_0A-D30V_OEM_Manual_Mar82.pdf Sony MODEL OA-D30V OEM MANUAL] for one of the earliest usages. FWIW, the original proposed dimensions for the industry standard were in inches, see "The Microfloppy—One Key to Portability," Thomas R. Jarrett, Shugart Corp, Computer Technology Review, Winter 1983, p. 245. The ANSI standards process probably caused the medium to be dimensioned in both units of measurement. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 06:56, 21 September 2021 (UTC)

== "Citation Needed" ==

"as the quality of recording media grew, data could be stored in a smaller area.[citation needed]"

This is simply a statement of basic logic. Anybody with even a passing understanding of the technologies of the latter 20th century knows that magnetic storage media of all kinds have been greatly improved. With improved media, it logically follows that users can store more data, more reliably, in a smaller physical space of the magnetic media. I fail to see why basic logic needs to be explained only in the form of a quotation of somebody else saying exactly what the author said themselves. Just because something was written prior to this article does not make it more reliable than this article.

No citation is needed, nor would it help the article in any way. The author handled the issue sufficiently. And Wiki tends to be extremely overly awed by 'citations', which are merely things written prior to this the current article under discussion. That does not make them any truer or wiser; just earlier.

Citations should only be required when making extraordinary claims, when recounting historical events, or when it would clarify the article. None of these cases applies here. And if this is in opposition to Wiki policy, then Wiki policy is flawed.

Philosopher8 <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/76.89.248.248|76.89.248.248]] ([[User talk:76.89.248.248|talk]]) 16:25, 20 December 2011 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->

== 3.5 inch read speed? ==

I think someone's got confused over units - by no means is a CDROM only 1.2x faster than a floppy! The fact that a typical PC floppy interface, that's also designed for and used with tape backup drives, can shunt 500-1000kbit/s (kbytes, even?) down its cable has absolutely no bearing on the usual disk transfer speed, in the same way that very, very few PATA hard disks come close to 133mbyte/s even when mated to an ATA-133 controller and connected to an ATA-133 motherboard with a hi-speed cable.

I'm going to try and correct it the best I can from my own knowledge; although this is OR correcting OR, as I have no sources, it is at least non-confused. I can't back it up, but I know it's more factually correct, if for no other reason than I know that a 1.39mb file takes about 90 seconds to read off an MSDOS twist-formatted (ie quick-as-reasonably-possible/3 sectors per rotation) floppy, but less than 5 from a CDROM in a double-speed drive.

The latter part mentioning 125kbit/s is closer to the truth (for a start, that more-or-less matches up with the observed speed, and the maths of 15x half-kilobyte sectors per second for each side of an HD formatted disk), but is still a bit off; I reckon 120kbit, and it's sustainable when reading a single, sequentially recorded file off one the aforementioned twist disk (which is the default for DOS/Windows machines since at least the early 90s). Which also works out to about 60kbit for a quick-read formatted DSDD, or probably closer to 20kbit for a plain-format one... however I will omit mention of them because I can't make that idea marry up to my other experience of it most certainly not taking almost five minutes to read or copy a full 713kbyte DSDD disc! It's probably more reasonable to assume that all disks are twist-type since quite early on, as it can't have been that hard a thing to figure out.

Of course, the speed slows if you're accessing multiple small and/or fragmented files, as most operating systems re-seek to track 0 before searching for the next chunk whenever they deal with non-sequential data on a floppy... but similar is true of all spinning disk formats, so is it THAT worthy of reiteration? Certainly not with an estimated speed figure anyway, as the variable nature of it (a heavily fragmented one, or one with a thousand little files, or one with bad sectors can be achingly slow, as you're maybe picking up 1-2 kbytes per each ~1-second read-seek track 0-seek next file operation... i.e. single digit kilobit/sec) makes such estimates pretty meaningless.

Also it'd probably just confuse matters to mention the very few double-speed drives? (the only ones I've seen are USB ones, presumably intended for archiving large libraries of floppies at 600rpm/240kbit rather than the regular speed...) - quite why high density/high speed models were never developed (or at least didn't gain popularity) during the format's heyday, but stuff like Zip drives did, is a mystery we may never solve. Maybe one of increased noise and wear? I'd have quite liked a 1200rpm, 60kbyte/sec floppy during the days before CDRWs became a practical proposition.[[Special:Contributions/193.63.174.211|193.63.174.211]] ([[User talk:193.63.174.211|talk]]) 17:41, 19 January 2012 (UTC)

:The specified '''data transfer rate''' (or read speed) of the device is the rate at which it transfers user data off its medium - period, end of research. I don't think we should be confusing the article by using anything else.

:The fact that some early FD controllers, system buses and/or device drivers could not even support the FDD data rate necessitating interleave is irrelevant to this specification. Likewise the loss of performance due to file fragmentation and/or low level formatting is also irrelevant to this specification. I suppose a discussion on specified '''data transfer rate''' versus net data transfer rate might be interesting but it applies to all disk media so I am not sure such a discussion in the FD article is appropriate. I haven't done the math to see if the specified data rate of any FDD is 1/1.6 that of the single speed CD but that would not surprise me. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 19:24, 19 January 2012 (UTC)

:Also I am pretty sure that interleave died out very early so to talk about it as "efficient" is a gross exaggeration. It is actually an inefficient format used to optimize performance on certain early slow computing systems. So the whole paragraph needs rewriting.

:Furthermore, I am not sure what relevance the USB FD emulators have to do with this section and I think I will edit them down or out. Maybe they have some relevance in an article on the FDD controller which could note the controllers supported higher data rate the and FDDs supported and this was used by certain FDD emulating USB drives. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 19:35, 19 January 2012 (UTC)

:FWIW:
{{quote box
|quote=No, 2Mbps data rate for tape drives was not included into the 82091AA due to the rarity of the technology at the time of the device's production. The majority of tape drives uses either 500Kbps data rate or 1Mbps data rate and the AIP supports all of these current tape drives. The elimination of the 2Mbps data rate from the 82091AA also removes the need for the 48MHz clock; only a 24MHz oscillator is required. For customers interested in 2Mbps data rate functionality, we recommend the 82078-1.
|source=[http://www.intel.com/design/archives/periphrl/docs/7549.htm Intel 82091AA Advanced Integrated Peripheral Technical Question & Answers]
|width=90%
|align=center}}
::Depending upon the FDD controller the data transfer rate could be as high as 2.12 mbps as for example in the 82078-1. I don't know if any controllers ever operated at higher speeds but the read speed of an emulator is a function of the FD controller design. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 00:34, 20 January 2012 (UTC)

== “1.44 MB”, “2.88 MB” ==

Thanks to marketing, the “1.44 MB” and “2.88 MB” figures are canonised; however they are not accurate. The actual capacities of the relevant formats are 1474560 and 2949120 bytes, which can be reasonably expressed as 1.47 and 2.94 MB (purely decimal units), or 1.4 and 2.8 [[MiB]] (binary-friendly units). While it's not out of line for the article to mention the popular designators, when talking capacities it should state the ''real'' capacities.<br><small>—[[User:Brian Patrie|überRegenbogen]] ([[User talk:Brian Patrie|talk]]) 19:57, 25 May 2012 (UTC)</small>

:That’s already noted in the table in the section "Sizes, performance and capacity", and in the discussion following that table. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 22:39, 25 May 2012 (UTC)

== diskette vs floppy ==
Two editors have asserted the following belongs in the lede
{{Quote box
|quote = To distinguish the original flexible disks from the smaller, hard-cased disks, the latter is sometimes referred to as a diskette while the former is referred to as a floppy.
|align = center
|width = 70%
}}
}}
{{User:MiszaBot/config

|maxarchivesize = 100K
There is no evidence to support this generality. Both terms have been used throughout the industry to apply to all sizes.
|counter = 6

|minthreadsleft = 5
According to ANSI and ISO the standard name is the same for all sizes of floppy disks, namely "Flexible disk cartridge." The standards directly contradict the assertion.
|minthreadstoarchive = 1

|algo = old(365d)
The term "diskette" was introduced by IBM with its first "Type 1 Diskette" (8-inch SSSD) directly contradicting the assertion. Sony itself described its 3.5-inch device as a "floppy disk" development project and many years later announced discontinuance of its "floppy disks", again both directly contradicting the assertion.
|archive = Talk:Floppy disk/Archive %(counter)d

}}
Given this is contradicted by the common usage of language and absence a reliable source this sentence should be deleted. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 03:03, 9 July 2012 (UTC)
{{Broken anchors|links=
:What could be said is that "floppy diskettes" where originally named after their mechanically flexible nature, but that the term was continued to be used by some (many?) when less flexible diskettes surfaced the market. However, this may also depend on the locale. Over here in Germany, we pretty much stopped to use the term "Floppy" when 3.5" diskette drives came up, except for when actually refering to 5.25" and 8.0" diskettes or when refering to terms translated from English sources (who apparently continued using "floppy", "FDD", "FD", etc.). --[[User:Matthiaspaul|Matthiaspaul]] ([[User talk:Matthiaspaul|talk]]) 11:22, 9 July 2012 (UTC)
* <nowiki>[[List of floppy disk formats#IBM 8-inch formats|IBM 53FD]]</nowiki> The anchor (#IBM 8-inch formats) [[Special:Diff/1179413710|has been deleted]]. <!-- {"title":"IBM 8-inch formats","appear":{"revid":469362004,"parentid":469349570,"timestamp":"2012-01-03T18:03:32Z","removed_section_titles":["IBM and DEC 8-inch formats"],"added_section_titles":["IBM 8-inch formats","DEC 8 inch formats"]},"disappear":{"revid":1179413710,"parentid":1163720223,"timestamp":"2023-10-10T00:00:50Z","removed_section_titles":["IBM 8-inch formats","DEC 8-inch formats","Other manufacturers","Physical composition","CITEREFEngh1981","CITEREFStevens1981","CITEREF1978","CITEREF1982","CITEREF1991","CITEREF2012","CITEREF2000"],"added_section_titles":["Physical formats","CITEREF1985","CITEREF1986"]}} -->

* <nowiki>[[List of floppy disk formats#IBM 8-inch formats]]</nowiki> The anchor (#IBM 8-inch formats) [[Special:Diff/1179413710|has been deleted]]. <!-- {"title":"IBM 8-inch formats","appear":{"revid":469362004,"parentid":469349570,"timestamp":"2012-01-03T18:03:32Z","removed_section_titles":["IBM and DEC 8-inch formats"],"added_section_titles":["IBM 8-inch formats","DEC 8 inch formats"]},"disappear":{"revid":1179413710,"parentid":1163720223,"timestamp":"2023-10-10T00:00:50Z","removed_section_titles":["IBM 8-inch formats","DEC 8-inch formats","Other manufacturers","Physical composition","CITEREFEngh1981","CITEREFStevens1981","CITEREF1978","CITEREF1982","CITEREF1991","CITEREF2012","CITEREF2000"],"added_section_titles":["Physical formats","CITEREF1985","CITEREF1986"]}} -->
:I have to agree with Tom. At least in the US, the terms were mostly interchangeable - not that people didn't occasionally try to make a distinction. In any event, the usual position is that "floppy" refers to the *media*, not the package, and 3.5 inch diskettes are certainly still have floppy media. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 16:30, 9 July 2012 (UTC)
}}

::And I'd add that even calling the 8 inch and 5.25 inch packages "floppy" is a bit of an abuse of the word - the packages, while not super strong, are fairly stiff, and not what you'd really call floppy - the media inside, OTOH, certainly is. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 16:36, 9 July 2012 (UTC)

:Yes, I agree with Tom and Rwessel. The terms were always used interchangeably and refer to the storage media itself, not the case/package. It differentiates between the earlier hard platter disks (hard disk) vs. the flexible disks introduced for removeable media. I've never heard of it refering to the difference in casing of the removeable disk format. --[[User:Wgungfu|Marty Goldberg]] ([[User talk:Wgungfu|talk]]) 20:07, 9 July 2012 (UTC)

::The 1977 patent on the Shugart 5.25 inch floppy drive, [http://www.google.com/patents/US4040106 Flexible Magnetic Disc Drive Apparatus 4,040,106] uses both disc and diskette.
<blockquote>2. Description of the Prior Art:</br>
A flexible disc recording medium, sometimes called a floppy-disc or diskette cartridge, is a mylar disc enclosed in a plastic envelope having apertures for enabling the disc to be driven. Magnetic material is secured to the faces of the disc so as to provide the recording surfaces. A flexible disc drive for receiving and making functional use of the cartridge typically consists of a drive mechanism, a read/write head, a track positioning mechanism and means for receiving and loading the cartridge onto the drive mechanism and the read/write head.</blockquote>
::I happen to have a box of Fujifilm 3.5 inch high density "Floppy Disks". Here is an advertisement for these disks. [http://books.google.com/books?id=H53CIZnYLZwC&pg=PA335 PC Magazine August, 1993 page 335] -- [[User:Swtpc6800|SWTPC6800]] ([[User talk:Swtpc6800|talk]]) 19:06, 3 August 2012 (UTC)
:::And on the other side of that, I have a couple of boxes of Scotch 3M 5.25 inch "diskettes" (big letters, right on the box), and some Dysan 5.25s which have "Diskette Care and Handling Information" printed on the back of the sleeves. And some BASF 5.25 "FlexyDisks", just for variety. If anyone is interested, I'll scan some of those and upload the images. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 04:59, 4 August 2012 (UTC)
::::The terms "floppy disk", "floppy disc", "diskette" and "disc" are interchangeable. The formal terms such as "flexible disc cartridge" are rarely used. --[[User:Swtpc6800|SWTPC6800]] ([[User talk:Swtpc6800|talk]]) 16:24, 4 August 2012 (UTC)

the term "Floppy", regardless of what other words are attached, refers to the MEDIA, not the case. In all cases, the media inside the case is quite flexible and this served to differentiate it from the then-standard "hard disk drive". they're all floppies. [[User:KLWhitehead|Ken]] ([[User talk:KLWhitehead|talk]]) 13:19, 26 September 2012 (UTC)

== Floppy disk music ==

Do you think it would be appropriate to include a little tidbit about the rise of using floppy drives for musical instruments? Here's an example http://www.youtube.com/watch?v=qWkUFxItWmU&feature=related . [[Special:Contributions/108.222.163.196|108.222.163.196]] ([[User talk:108.222.163.196|talk]]) 05:01, 29 August 2012 (UTC)
:The article is rather PC centric - a *brief* list of some of the more interesting non-PC applications would be a good addition. Off the top of my head, [[Numerical control|CNC machines]], musical devices (for example, Yamaha's [[Disklavier]]), configuration/boot for non-PC devices (for example, many [[IBM 3270]] controllers), test and measuring instruments (for example, [[Oscilloscope]]s). [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 02:17, 1 September 2012 (UTC)

== Write Protect tab does not protect from damage ==

"They all shared a number of advantages over the old format, including a rigid case with a sliding write protection tab, protecting them from damage;"

The write protect tab only prevents a disk from being written to. The part in addition to the housing that protects the disk from physical damage is called the shutter.

Or is the article only referring to the 8" disk as "the old format"? <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/8.20.67.4|8.20.67.4]] ([[User talk:8.20.67.4|talk]]) 19:59, 8 November 2012 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->

http://www.bgsu.edu/departments/english/cconline/sammons/floppy.pdf <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/8.20.67.4|8.20.67.4]] ([[User talk:8.20.67.4|talk]]) 19:43, 8 November 2012 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->

:I think what we have (or had) here is a simple poorly structured sentence, as the "protecting from damage" part refers to the "rigid case". this appears to have been re-written to clarify and this one can be closed[[User:KLWhitehead|Ken]] ([[User talk:KLWhitehead|talk]]) 18:57, 7 February 2014 (UTC)

== First 3½-inch FDDs ==
{moved from [[User_talk:ArnoldReinhold#First_3.C2.BD-inch_FDDs]]

Yr [http://en.wikipedia.org/enwiki/w/index.php?title=Floppy_disk&diff=531032640&oldid=530587935 edit] states the first 3½-inch FDDs were 320 KB but u provide no evidence. To the best of my recollection this form factor was double sided from the beginning, e.g. Shugart SA300/350. FWIW, I was at the Shugart announcement in 1982<strike>1983</strike> and have their November 1983 data sheet. Note that the article correctly distinguishes the industry standard 3½-inch FDD from the original Sony product; they were neither media, interface nor form factor compatible. So unless u have some evidence I plan to revert that part of yr edit [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 05:55, 3 January 2013 (UTC)
:Take a look a our [[History of the floppy disk]] and the sources given there. Here is a book ref as well [http://books.google.com/books?id=lArb3nGc3ssC&pg=PA55&lpg=PA55&dq=Shugart+SA300&source=bl&ots=Kz55scI0d3&sig=SOwd_vtZIDFWa2ifoWcKJgiDyYo&hl=en&sa=X&ei=3oblUKu7GoyM0QGbt4HADQ&ved=0CDcQ6AEwAQ#v=onepage&q=Shugart%20SA300&f=false] It says 360KB, so i'll change that. A Google search on Shugart SA300 gives plenty of sources that say they are single sided. (They were "double density" from the beginning, perhaps that is what you recall.) I was an early customer of the hard shell floppies and my company wasted a ton of money on the Hitachi 3" drives before switching to the Sony 3.5" format. You are correct that the earliest Sony floppies had a slightly different form factor than what the industry settled on, but few of those were sold. I have plenty of sources for early Macs using single sided drives. (And plenty of single sided diskettes in my basement.) The physical diskettes were the same as those used in PCs. They introduced 800K double sided drives with the MacPlus in 1986. The 3.5" form factor did not catch on in the PC world until after Apple popularized them, so there may not have been many sold at 360KB, as this had little advantage over the then ubiquitous 5-1/4" drives. --[[User:ArnoldReinhold|agr]] ([[User talk:ArnoldReinhold#top|talk]]) 13:23, 3 January 2013 (UTC)

::Neither your citation nor the [[History of the floppy disk]] disputes my contention that the industry standard 3½-inch FD and FDD were simultaneously introduced in both one and two sided formats (and single and double density for that matter). As I stated above, I have a copy of the SA300/SA350 Data Sheet dated November 1983; the SA300 is one sided and the SA350 is two sided. I have no idea why the book u cite does not list the SA350 but I can tell you from personal experience that they were simultaneously introduced and show you such a data sheet. Furthermore the 1983 Disk/Trend Report, Flexible Disk Drives, lists on page DT-14-2 7 vendors of "3½-inch disk diameter" drives, 6 of which, including Sony, offered FDDs in both one and two sided versions compatible with the industry standard format. The early HPs used the early one sided Sony which WAS not compatible with the industry standard format; among many things the tpi was different. Finally, the FD that Apple selected in 1984 was the one/two sided industry standard design approved in 1982 and which began shipping in 1983; just because Apple choose to go with the lower cost one sided design proves nothing about the existence of the two sided design. IBM later the same year went with the two sided version. I still plan to change your edits, this time with this reference to Disk/Trend, "they [two sided 3½-inch drives] have been widely used with newly introduced systems in 1984." and others to support the fact of simultaneous introduction of one/two sided and single/double density 3½-inch drives. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 18:02, 3 January 2013 (UTC)

:::Here is a further quote from the June 13, 1983 InfoWorld article I cited on the introduction of the SA300: "Shugart's Kevin Burr said the obvious next step is to put another 500K of storage on the other side of the diskette and that the firm will come out with a double-sided 1-megabyte micro-floppy drive soon." That is straight from the horse's mouth quoted in a reliable secondary source. It was common then (and now) to issue data sheets for products that were not ready to ship. BTW this discussion should take place on [[Talk:Floppy disk]]. If it's ok with you, I'd like to move it all there.--[[User:ArnoldReinhold|agr]] ([[User talk:ArnoldReinhold#top|talk]]) 18:35, 3 January 2013 (UTC)

:::::Please put a link to the Burr article, I cannot find it. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 19:15, 3 January 2013 (UTC)
::::::I put a link in the article. It is [http://books.google.com/books?id=zS8EAAAAMBAJ&pg=PA8&lpg=PA8&dq=shugart+SA300+introuced&source=bl&ots=rW9E1UjbJf&sig=8GnYHwEL1n1F1KauyVoCiXT6zao&hl=en&sa=X&ei=vY7lULHAEPOs0AGLmICgCQ&ved=0CEkQ6AEwBA#v=onepage&q=shugart%20SA300%20introuced&f=false]/

::::In January 1983 Shugart's Thomas Jarrett in Computer Technology Review talking about the Microfloppy Industry Consortium's secification described the SA300 and stated "A double-sided 1-Mbyte version has also been announced." At that time neither product was shipping, according to Disk/Trend the SA300 shipped in 2Q83 and the SA350 in 1Q84. It is not uncommon for different models in one family to ship at different times, but according to Disk/Trend 4 of the first six drive vendors (Teac <strike>Sony</strike>, Tandon, Epson, Alps) simultaneously first shipped one and two sided drives. <strike>and as near as I can tell all vendors of double sided 3½-inch FDDs shipped their one sided version first but that doesn't change the fact</strike> The fact is that the medium was designed from the beginning as one and two sided and the drive products were designed as a family of one and two sided drives. This is in marked contrast to the 8 and 5¼ inch FDDs where two sided followed one sided by years and were basically different products. That's an important distinction and yr current edit obviates it. You might want to take a look at this [http://en.wikipedia.org/enwiki/w/index.php?title=History_of_the_floppy_disk&curid=18171857&diff=531126009&oldid=528244026 edit] which is probably all this topic deserves [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 19:15, 3 January 2013 (UTC)

::::One final point, I hope, from Disk/Trend. In 1983 the first one sided HDD (Shugart) and first two sided HDD (Tandon) shipped within about a month of each other; by the end of 1983 there were 4 one sided (Shugart, Sony, Tandon, Epson) and 2 two sided (Tandon, Epson) drives shipping. Looks simultaneous to me, particularly when compared to prior generations. The reason of course is that it was very difficult to make the two sided reliable until the invention of the Tandon patent which didn't get commercialized until the early 1980s. But after that it was foolish to just design a one sided drive. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 20:05, 3 January 2013 (UTC)

My recollection is that the single sided shipped in quantity for a while before double sided were as widely available. Once DS were fully available, SS made little sense as DS was a huge leap in functionality. But we don't have to get into that here. I edited the section lead with different language that I hope reflects a common understanding. Let me know what you think.--[[User:ArnoldReinhold|agr]] ([[User talk:ArnoldReinhold|talk]]) 21:55, 3 January 2013 (UTC)

:According to 1986 Disk/Trend, in 1984 two sided 3½ was 35% of about a 2.0M unit market. 1983 was a 400k total market, mostly one sided, but the 1984 two sided at ~700k was almost double the total 1983 one sided. It sounds to me like a lot of two sided availability in 1984 and I will revise the edit to reflect this. See what u think. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 22:43, 3 January 2013 (UTC)
::Your revision suggests 1.44 meg HD floppies were shipping in 1984. I don't think that's correct. I'll do some research.--[[User:ArnoldReinhold|agr]] ([[User talk:ArnoldReinhold|talk]]) 23:24, 5 January 2013 (UTC)

:::That's not what I intended to say. Two sided double density 3½-inch FDDs shipped in 1984 with capacity of 1000 KB unformatted or 720 KB formatted. The HD versions (2.0 MB unformatted, 1.44 MB advertised) came in 1986. There was also a 1.6 MB unformatted variant in the same time period that went no place. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 01:17, 6 January 2013 (UTC)
:::Fixed, thanks for catching my goof. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 01:22, 6 January 2013 (UTC)
::::Good work. I think we've got this one settled.--[[User:ArnoldReinhold|agr]] ([[User talk:ArnoldReinhold|talk]]) 04:48, 6 January 2013 (UTC)

== Fractional Floppy Typography ==
We have a variety of inconsistent expression of the types of fractional sized FDs, ranging from 5.25 inch, 5 ¼-inch, 5¼-inch, etc. I checked various style guides and did some Google searching without finding any guidance. In their absence I think the standards should be 5¼-inch and 3½-inch through out; to my eyes the spaced versions look really bad, particularly when preceded by number as in the various section heads; e.g. this current
::[[/Floppy_disk#3+1.E2.81.842-inch_floppy_disk_.28.22Microfloppy.22.29|'''3.3 3 1⁄2-inch floppy disk ("Microfloppy")''']]
versus this proposed
::[[/Floppy_disk#3+1.E2.81.842-inch_floppy_disk_.28.22Microfloppy.22.29|'''3.3 3½-inch floppy disk ("Microfloppy")''']]
Rather than [[WP:BB|be bold]] I thought I would first see if anyone has strong feelings either way. In the absence of objection I will go ahead in a few days. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 17:58, 4 January 2013 (UTC)

:I don't actually disagree, but [[MOS:FRAC]] seems to indicated a preference for a space between the integer and the fraction, and [[template:frac]] does the same, presumably as an implementation of policy. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 06:36, 5 January 2013 (UTC)

::Since we really are not talking as much about numbers as names of products its not clear the MOS is binding but even the MOS [[Template:sfrac|SFAC template]] seems to allow fractions abutting integers as in {{sfrac|3|1|2}} and {{sfrac|5|1|4}}. The resulting header using non-breaking space and en dash would be
:::[[/Floppy_disk#3+1.E2.81.842-inch_floppy_disk_.28.22Microfloppy.22.29|'''3.3 {{sfrac|3|1|2}}&nbsp;&ndash;inch floppy disk ("Microfloppy")''']]
::I think the unicode looks better and will probably work better embedded in a paragraph but by using the template rather than unicode I could avoid Wiki police :-) Let's wee what others have to say. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 17:23, 5 January 2013 (UTC)

== Floppy Drive ==

Is there any interest in a separate article on the drives? Years ago I heard a remark, possibly spurious, that the color of the activity light on the front of a 5 1⁄4-inch drive indicates capacity and that a 360 kB drive can corrupt data on a 1200 kB diskette without any indication of error. In contrast, I've never heard of inadvertent data corruption with a 3 1⁄2-inch drive. Such information is worthy of inclusion here or in an article dedicated to the drives. ... Regards, [[User:PeterEasthope|PeterEasthope]] ([[User talk:PeterEasthope|talk]]) 03:36, 21 February 2013 (UTC)

:I don't think the drives are really separable from the media, and are in any event covered in the various floppy disk articles. The issue of corruption on mismatched density 5.25" media and drives is covered, at least partially, in [[History of the floppy disk]]. This was a non-issue on 3.5" drives, as the case of 3.5" diskettes had a notch indicating density, preventing a drive from using incompatible media. As to a density indication via a status or activity lamp, I've never seen such of a FDD, and I've seen many FDDs, although it doesn't mean that someone somewhere didn't do it. But it was certainly not a standard or common feature. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 07:44, 21 February 2013 (UTC)

:I agree with [[User:Rwessel|Rwessel]], no need for separate article. FWIW, I don't recall the any issue of 350 KB 5¼-inch drives corrupting a 1.2 KB (other than by attempting to format) nor do I recall any LED color indication of capacity. The latter is theoretically possible in the 1.2 KB drive once it has read the medium, but that would have required on board intelligence and I am not sure too many of those drives had microprocessors and data read capability. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 17:33, 21 February 2013 (UTC)

::It could have been done by the host system after it read the media (after all, the interface to the FDD was quite low-level, the host, either on the CPU or the FDD controller, did quite a bit of the heavy lifting needed to run the drive). Then the drive would only have to provide a programmable LED. Or it could have been driven off the DENSEL signal from the controller. But I never did see anything like that on a FDD. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 19:58, 21 February 2013 (UTC)

My reference to "color of the activity light" was ambiguous. Should have said "color of the plastic window in front of the activity light". The claim I heard was only that the color of the plastic window indicated capacity. Not that the electronics of the drive or the function of the computer were involved. The colors I recall are red, yellow and green. Seems plausible that a manufacturer would have such a color code but agreement between different manufactures is another question. I should test the dozen or so old drives here. Thanks for the discussion. ... [[User:PeterEasthope|PeterEasthope]] ([[User talk:PeterEasthope|talk]]) 14:53, 1 March 2013 (UTC)

:The LED color was generally customer selectable, and by customer, I mean the computer manufacturer who would order batches of thousands of these things. The ones for individual sale tended to not to have that sort of option (although they were often packed with more than one color bezel). Here are a couple of data sheets from Samsung (see section 9.2) and ALPS (see last line in "features" section at the beginning):

:http://www.techtravels.org/amiga/SAMSUNG-SFD321B-070103.pdf
:http://maben.homeip.net/enwiki/static/S100/alps/diskette/alps%20DF35%20diskette%20drive.pdf

:[[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 22:47, 1 March 2013 (UTC)

::FWIW, my recollection is that they were all red to start with (that's the only color at first) and at sometime ISO (or ECMA) banned red for other than malfunctions. So I suspect it is a mess and not worthy of inclusion in this article. Just my 2 cents. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 18:37, 2 March 2013 (UTC)

:::I suspect that cost had something to do with it too. Red LEDs were significantly cheaper than the other colors into at least the mid-80s, and a few years before that you basically had your choice of any color so long as it was red. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 23:07, 2 March 2013 (UTC)

:::The confusion likely arises from the staggered implementation of the 'anything-but-red' rule. The rule came from the Europeans/EU who at the time were about legislating just about anything and everything for the flimsiest of reasons, and had been known to change their minds in the past. We had previously dealt mostly with the French prior to the EU formation and were fairly accustomed to seesaw human factors dictates; a rule today was likely changed or superceded next year. The ruling was that red should mean personal danger only, and since there was no real personal danger from drive activity, red could not be used. (during this era the red high-beams indicator on your car also changed to blue for the same reasons) Other colors were available at a significant extra cost and importers had to start specifying them from the drive OEMS. Since there was no standard and other colors were in short supply, we got whatever color we could get. I worked at Datapoint during this time and recall the changeover mess. The phase-in was pretty long and for quite awhile we saw a mix of red, yellow and green LEDs in our disk drives (purchased from several OEMs). There was no significance to the colors other than we had to make sure we had used all the red ones before the cutoff date. As we used various size drives at different rates from different suppliers, it is easy to see that someone could think that a color indicated drive capacity but as far as I recall that would be a simple misconception based on the staggered conversion away from red. The activity light was only on HDDs, our 8.5" FDD (which we made) had no activity light iirc. Since we OEM'd our 5.25 FDD I do not recall the issue on them. [[User:KLWhitehead|Ken]] ([[User talk:KLWhitehead|talk]]) 15:38, 9 September 2013 (UTC)

::::Ken is probably talking about the Burrough's 8½ FDD which did not achieve commercially significant volume. The Shugart SA800 (8-inch) and SA400 (5¼-inch), both commercially significant in high volume did have LED "activity lights" as to the best of my recollection did most FDDs. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 16:18, 9 September 2013 (UTC)

::::No, I'm talking about the Shugart-type drives as built by Datapoint (by the 10s of 1000s). Which actually, now that I found an old snapshot, had an LED in the release button. And it was red. [[User:KLWhitehead|Ken]] ([[User talk:KLWhitehead|talk]]) 19:10, 10 September 2013 (UTC)

:::::Sorry u thru me off with the 8½-inch dimension which I thought was a Burroughs unit. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 00:41, 11 September 2013 (UTC)
::::::you are correct, it was 8.0 not 8.5. It was an internal design based on Shugart's. [[User:KLWhitehead|Ken]] ([[User talk:KLWhitehead|talk]]) 19:05, 12 September 2013 (UTC)

: I don't think there was any color convention for the activity LEDs or their colored windows in floppy drives used in any kind of PC. Colors changed over time as a matter of "fashion". At some time, red LEDs were considered "old fashioned" and therefore were often replaced by green or amber ones, where the color had not to remain red for some specific reason. This was/is a general trend, not limited to floppy drives. Today, we see many blue LEDs for similar reasons (although I haven't seen them in floppy drives, yet).
: --[[User:Matthiaspaul|Matthiaspaul]] ([[User talk:Matthiaspaul|talk]]) 21:24, 10 September 2013 (UTC)
::There was a European based directive to not use red for other than a warning that caused all of us (FDD, HDD, etc) to migrate away from red LEDs as activity indicators. I seem to recall having to process the changes either in the early 80s (I was at Shugart) or the late 80s (I was at SyQuest). I don't recall specific color being an issue, just not red and inexpensive. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 00:41, 11 September 2013 (UTC)

== Binary Prefix War Redux ==
[[User_talk:Nnemo|Nnemo]] is resurrecting the binary prefix wars in a rather unusual way, he wants to change the generally accepted binary designation KB to kB throughout this FD article. First of all, floppy disk capacities are (except for the very earliest) measured in binary kilobytes, where 1 KB = 1,024 bytes not 1 kB = 1,000 bytes. Furthermore most of the literature, spec sheets, etc. use KB and not kB. Its more complex in that MB can mean 1,000,000 or 1,024,000 or 1,048,576 depending upon context which is why I think we should use KiB and MiB in this article but that is another fight. In any event kB is simply inaccurate. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 06:00, 18 March 2013 (UTC)

== Correction/clarification on Apple external floppy drives and Eject buttons ==

Made an edit to clarify that 400k and 800k external floppy drives from Apple sold for Macintosh did ''not'' contain eject buttons. The existing description of the presence of an eject button for use with the Apple II and how the button is disabled when attached to a Mac is/was correct, for these later external drives. The article [[Macintosh_External_Disk_Drive|Macintosh External Disk Drive]] clearly shows the lack of an eject button, but unfortunately it is not explicitly mentioned in the text.
I am the original owner of an 800k Macintosh External Disk Drive and also own the later universal model ''with'' the eject button as already described in the pre-edit text. (I might also have my brother's 400k external.) If it would help, i could photograph these drives and submit to Wikimedia.
This is my second-ever edit to any Wikipedia article. If i’ve made any mistakes, i’ll learn from your all’s wisdom and correct them as i can.
--[[User:Sonic Purity|Sonic Purity]] ([[User talk:Sonic Purity|talk]]) 22:09, 28 November 2013 (UTC)
:Good error corrections; unfortunately I wiped out the several sentences on a belief that they were [[WP:TMI|TMI]]. The only suggestion I would have made had it continued is don't start a sentence with digits and don't mix yr descriptions, perhaps starting with something like, "The original external {{frac|3|1|2}}-inch drives (400K and 800K)..." [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 05:19, 29 November 2013 (UTC)

== Chart errors ==
The chart has incorrect capacity data for the 8" SSSD (3.1mB) and DSSD (6.2mB). [[User:KLWhitehead|Ken]] ([[User talk:KLWhitehead|talk]]) 16:31, 8 January 2014 (UTC)
:No they aren't: note the small "b", the unformatted capacity is, indeed, 3.1 million *bits*. *Arrgh* hit save too soon. There may be cause for changing those to bytes for consistency. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 18:10, 8 January 2014 (UTC)
::I made them megabits for consistency and to avoid binary digit confusion. The whole table would benefit from a cleanup using unambiguous prefixes, but that is another battle :-) [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 22:16, 8 January 2014 (UTC)

== (Eg.) "8-inch", "8 inch", or "8&nbsp;in" ==

[[Wikipedia:Manual of Style/Dates and numbers]]: "In prose, unit names should be given in full if used only a few times, but symbols may be used when a unit (especially one with a long name) is used repeatedly (spelling out the first use". Seems inches (not in) is ok (more than a few?). However not sure the hyphen is allowed. Same for [[16-bit]]. Is there some justification? [[WP:UNITS]] says use SI-units if science or "UK engineering article". I disagree with not using inches for floppies, computer/TV screens etc. but might it here hinge on if floppies are deemed scientific? Or engineering and invented in the UK (seems the were not). [[User:Comp.arch|comp.arch]] ([[User talk:Comp.arch|talk]]) 10:29, 4 March 2014 (UTC)

:The names were cleaned up a long time ago, but a few variations have crept in over the years. I've gone ahead and made them consistent (8-inch, {{frac|5|1|4}}-inch, and {{frac|3|1|2}}-inch) again. I did dither a bit on the usages in the second paragraph, which are sort of half way between specifying a dimension and a name (although 3.5-inches is incorrect as a dimension for {{frac|3|1|2}}-inch floppies). If someone feels strongly about those, I can see changing them back. A couple of places continue to use inconsistent formats, either in quotes or names, or in a couple of places where dimensions are referenced explicitly ("The earliest floppy disks, developed in the late 1960s, were 8 inches (200 mm) in diameter"). [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 16:57, 4 March 2014 (UTC)

::FWIW, I also cleaned up [[Floppy disk variants]], [[Floppy disk format]], [[List of floppy disk formats]], and [[History of the floppy disk‎]]. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 17:48, 4 March 2014 (UTC)
:::Thanks, I guess "3.5-inches is incorrect as a dimension for {{frac|3|1|2}}-inch floppies" is a good justification for hyphen as it is a "name" and not an actual dimensions (in some cases). I don't disagree in general with a hypen is in [[16-bit]] but it seems to borderline contradict the [[WP:MOS]]? [[User:Comp.arch|comp.arch]] ([[User talk:Comp.arch|talk]]) 13:33, 5 March 2014 (UTC)

::::I'd consider 8-inch, {{frac|5|1|4}}-inch, and {{frac|3|1|2}}-inch in this context to be names or adjectives, not units. Same with 8-bit or 16-bit. IOW, the "16-bit computer with a {{frac|5|1|4}}-inch diskette drive had 128 MB of memory and weighted 57 pounds." I think an argument could be made the other way, but this is pretty common/customary usage. In any event, the MOS is (mostly) guidelines, but I believe using the hyphen in these cases would fall under the compound adjective rule [[MOS:HYPHEN]]. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 19:36, 5 March 2014 (UTC)
== IBM XDF formatted 3.5 inch ==

Not sure how important it is to include, but the entry on 3.5inch disks does not mention Extended Density Disks used by IBM in OS/2 and PC-DOS 7.
( http://en.wikipedia.org/wiki/IBM_Extended_Density_Format)
Amiga and Apple formatted disks are documented with their sizes, so I figured it's worth mentioning.
[[Special:Contributions/12.109.71.199|12.109.71.199]] ([[User talk:12.109.71.199|talk]]) <span style="font-size: smaller;" class="autosigned"> — Preceding [[Wikipedia:Signatures|undated]] comment added 21:05, 29 April 2014 (UTC)</span><!--Template:Undated--> <!--Autosigned by SineBot-->

== "The Floppy Disk Story" ==

An IP recently added "Grillet, Andrew; (2011). [http://www.amazon.com/dp/B006QMXYEA "The Floppy Disk Story"] User description of the impact of the floppy disk on computer use from the original 8" to its demise." to the ref section. I'm going to remove it again because the 13 page book doesn't appear to have a legitimate publisher, and has all the signs of being a [[WP:SPS]]. Grillet isn't a recognized expert, and a Google search indicates his other works are of a similar SPS or vanity-press status. Additionally, Amazon links are a violation of [[WP:RS]], which doesn't help. I suppose it might be of limited use, but I don't think it's a good idea to support refspam when it isn't rock-solid. [[User:Grayfell|Grayfell]] ([[User talk:Grayfell|talk]]) 22:17, 28 May 2014 (UTC)
:I don't think either [[WP:SPS]] or [[WP:RS]] are particularity relevant as the only issue with a Bibliography {sic, better as Additional Reading) should be [[Wikipedia:WikiProject_Bibliographies#Notability_of_bibliography_articles| notability]]. I thought the author's lede was interesting and was will to ascribe good faith to the IP as to notability. Since neither of us have read the eBook I don't see how we can now comment on notability - maybe I'll read it and see. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 04:56, 29 May 2014 (UTC)
:BTW Gillet has 9 eBook titles on Amazon (a publisher) going back to 2011 and as near as I can tell no other title is linked off Wikipedia so its not clear that [[WP:SPS]] or [[WP:RS]] would apply if an IP quoted one of his books. Nor is it clear that the IP who linked the book is Grillet. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 05:07, 29 May 2014 (UTC)

== I don't see the CF2 disk listed anywhere. ==

CF2 or Compact Floppy Disc was popular with early word processors and the Amstrad/Schneider line of computers.(joyce & cpc)
https://www.google.com/search?q=cf2+disc&es_sm=122&source=lnms&tbm=isch&sa=X&ei=M2-YU9nfE-PC0QXDx4HABw&ved=0CAkQ_AUoAg&biw=1802&bih=827 <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/83.101.79.207|83.101.79.207]] ([[User talk:83.101.79.207|talk]]) 15:02, 11 June 2014 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->

:It's listed in [[Floppy disk variants]]. Although that section could probably use some expansion. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 15:45, 11 June 2014 (UTC)

== 5¼-inch DS HD capacity + wrong units all over the page ==

IIRC, 5¼-inch DS HD disks had 1200KiB and not 1155 KiB as stated in the article right now (which also fits what other resources e.g. [[List_of_floppy_disk_formats]] or https://support.microsoft.com/en-us/kb/75131 say.

Apart from that, units like KB or K are not only ambiguous but also wrong in many ways, first "K" is not a SI prefix (that would be k) and then all these values are to the base 2, while all SI prefixes are to the base 10. Use KiB and friends instead.

Cheers, --[[User:Calestyo|Cálestyo]] ([[User talk:Calestyo|talk]]) 04:14, 20 March 2015 (UTC)


:The 1155kB was simple wrong, I fixed that. Not sure where that came from, perhaps someone was looking at the capacity after the file system was installed (which is one definition of formatted capacity, but not the one being used in the article).

:As to the kiB/kB/KB thing... This is a morass. I suggest you get out while you still can. ;-) First, we generally avoid the binary prefixes (ki, mi, etc.) per [[WP:COMPUNITS]], simply because of the very limited use of the [[binary prefix]]es in the real world. There has been vast debate on that, and the consensus is pretty clear - we're not using them. The misuse of the SI prefixes to imply powers of 1024 *is* a problem, but the binary prefixes are, due to the worlds massive unfamiliarity with them, probably a way of making the problem worse. If you'd like to try to change the consensus, this is not the place.

:In the case of K, the same guidelines suggest using a capital K to imply 1024, as that does follow fairly common industry practice, although a minuscule k is certainly common as well. Anyway, this article (and several of the related ones) have an unholy mix of kB and KB, that should really get cleaned up. Somebody remind me what the last consensus on this was? KB? I'll take a crack at some of this if I can figure out which way it's supposed to go.

:And I think I even spotted a kb or two scanning the article that appear to mean bytes not bits. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 05:28, 20 March 2015 (UTC)

== Wrong data rates ==
The article incorrectly specifies the data rates for DD, HD, and ED to be 500, 1000, and 2000 kbps. In fact, they are 250, 500, and 1000 kbps. 2000 kbps is used by some tape drives connected to a floppy disk controller, and not all floppy disk controllers even support such a data rate. I think this should be corrected. - [[Special:Contributions/94.140.73.150|94.140.73.150]] ([[User talk:94.140.73.150|talk]]) 12:25, 12 July 2015 (UTC)

:I believe this to be correct (the data rates for DD/HD/ED 3.5" floppies were nominally 250/500/1000kbps), although some controllers, supported a faster interface for non-floppy devices (although it's not clear to me which ones). The external link [http://www.retrotechnology.com/herbs_stuff/drive.html Floppy disk drives and media technical information] supports that, but the section as written is confusing and poorly sourced. Perhaps the sentence could be revised as: "These made better use of the available bandwidth, and eventually pushed the <s>500/1000</s>250/500 kb/s limits of standard (DD/HD) motherboard floppy disk controllers; higher end models could make use of the 2000 kbit/s throughput on <s>of DSED</s>some controllers" [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 19:05, 12 July 2015 (UTC)

== Disk Sizes==
I have used 10 inch discs in, IIRC, communications controller during the 1970s-1980s. [[Special:Contributions/198.53.137.96|198.53.137.96]] ([[User talk:198.53.137.96|talk]]) 17:30, 27 August 2015 (UTC)

:Reference please. What kind of communications controller? IBM 3274s and 3705s (stand-alone models), for example, used 8" floppies. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 18:20, 27 August 2015 (UTC)

::I'm not 100% sure, as its been a while, but my memory says the Sperry 1100/60 I worked on (USAF) in the early '90s used an 11-inch floppy as boot media (external boot controller) when doing a cold start. It had minuscule capacity as well (iirc, something like 32 kilobytes). [[User:Krenshala|Krenshala]] ([[User talk:Krenshala|talk]]) 17:59, 13 October 2017 (UTC)

:::FWIW the [[UNIVAC_1100/60]] article says it was an 8-inch FDD. There's lots of RS's on the 1100/60 so if anyone cares to investigate further have at it. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 07:44, 15 October 2017 (UTC)

== FDD Speed and Floppy Tape ==

I removed a large section starting with what I believe to be a dubious discussion of FDD effective data rate followed by irrelevant discussion and comparison of floppy tape.

AFAIK, only the very early FDDs were limited by system data rate and by the mid 1980s any PC could then operate at a 1-to-1 interleave. Also the format efficiency was about 85% so that the effective data rate was about 85% of the media data rate for one track. There might be a point about larger than one track reads where a poor format would cut the data rate by a factor of 2 (two revolutions per track) but a good format would not. This was somewhat discussed above in [[Talk:Floppy_disk#3.5_inch_read_speed.3F|3.5 inch read speed]]. All of this is way to much detail for Wikipedia so I think we keep it simple as it now reads.

BTW I looked for but did not find a reliable source discussing FDD effective data rate so to a certain extent the deleted material might be POV.

The rest of the stuff on Floppy Tape is irrelevant to the article, maybe someplace else in Wikipedia but not in this overlong section as it now stands. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 08:48, 24 December 2015 (UTC)

:In accordance with [[BRD]] I edited the disputed paragraph to provide sufficient information regarding ED FDD data rate. Note that most of the reverted material relates to formats other than ED. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 07:01, 17 September 2018 (UTC)

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== US Nuclear Force uses floppy disks ==
Still in use...
;-)
http://www.bbc.co.uk/news/world-us-canada-36385839
So not yet obsolete?
Update article accordingly...
[[Special:Contributions/66.155.23.67|66.155.23.67]] ([[User talk:66.155.23.67|talk]]) <small class="autosigned">—Preceding [[Wikipedia:Signatures|undated]] comment added 11:21, 26 May 2016 (UTC)</small><!--Template:Undated--> <!--Autosigned by SineBot-->
:That limited uses remain is not in question (it's even mentioned in the lead). That does not alter the obsolescence. Heck, there are actually still a few remaining uses for paper tape (mainly old CNC machines), that's solidly obsolete too. [[User:Rwessel|Rwessel]] ([[User talk:Rwessel|talk]]) 17:48, 26 May 2016 (UTC)

== Production status? ==

With the recent news that the [http://arstechnica.co.uk/gadgets/2016/07/vcr-vhs-production-ends/ VCR has been discontinued], I wonder if anyone is still producing the various sizes of floppy disks and disk drives? &ndash;&nbsp;''[[User:Philosopher|Philosopher]]''&nbsp;<sup>[[User talk:Philosopher|Let us reason together.]]</sup> 17:55, 23 July 2016 (UTC)
:For what it's worth, new USB 3.5" floppy drives are still on the shelves of stores like [[Fry's Electronics]]. Obviously that doesn't mean they're still being manufactured. Media on the other hand seems to be harder to find; I've only been able to find what appears to be overstocked inventory that retailers are selling through on Amazon. - [[User:Alyssa3467|Alyssa3467]] ([[User talk:Alyssa3467|talk]]) 19:36, 23 July 2016 (UTC)

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== Suggested addition to speed and or performance section: X10 accelerated floppy drive ==

One attempt worth mentioning to speed up the common 3.5" floppy disk was an [[X10 accelerated floppy drive]]. For those who recall how slow floppies really were. It could read an entire floppy disk in about five seconds. The X-10 drive ran at 4x spindle speed and could write or read to both sides of the floppy simultaneously. [[User:Holidaypepsi|Holidaypepsi]] ([[User talk:Holidaypepsi|talk]]) 19:23, 13 September 2017 (UTC)

:Well, no, not ''all'' floppy disk drives are as slow as the slowest they get. Remember Iomega's Clik!/PocketZip and regular Zip disks, Bernoullis, and other relatively high-capacity floppy disks like LS-240s? Not only do those disks hold a lot more data than standard floppy disks, they're noticeably faster. So I'd say yeah, if you want to go ahead and add that section, I'd be all for it!

:While you're at it, will you please merge the article [[floppy disk variants]] into this one and then rename that as a major section as "Variants from standard floppy disks"?

:[[Special:Contributions/2600:100E:B125:2F01:E342:7EFD:236F:4286|2600:100E:B125:2F01:E342:7EFD:236F:4286]] ([[User talk:2600:100E:B125:2F01:E342:7EFD:236F:4286|talk]]) 22:08, 13 September 2017 (UTC)

== Use unambiguous prefixes? ==

The capacities stated in this article are difficult to understand since they are a mixture of IEC decimal and [[binary prefixes]]. I would like to edit the article so that capacities are always stated in unambiguous IEC binary (e.g., KiB) or decimal (e.g. kB) prefixes. This was [https://en.wikipedia.org/enwiki/w/index.php?title=Talk:Floppy_disk&diff=prev&oldid=320018132#Kibibytes.2C_and_so_on shouted down in 2008]. I believed then and still do that this usage is permitted under the [[WP:COMPUNITS]] exception, "in articles in which both types of prefix are used with neither clearly primary, or in which converting all quantities to one or the other type would be misleading or lose necessary precision, or declaring the actual meaning of a unit on each use would be impractical." For example, I would replace 360 KB, no quotes, in the text with 360 "KB" (KiB), scare quotes, so as to not loose meaning but change the table in section 3.5 to use only IEC prefixes. I'd like to see if there is a consensus that this is permitted under the exception before I proceed. Comments? [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 16:57, 27 September 2017 (UTC)
: I would follow sources and not wholesale edit the article one way or the other. The IEC units are used more on Wikipedia than anywhere else, I think. --[[User:Wtshymanski|Wtshymanski]] ([[User talk:Wtshymanski|talk]]) 17:58, 27 September 2017 (UTC)
:I am all for edits that make the stated quantities unambiguous. Primary purpose of WP is providing accurate information.&minus;[[User:Woodstone|Woodstone]] ([[User talk:Woodstone|talk]]) 04:20, 28 September 2017 (UTC)
:: 100% agree with Woodstone. Even if not permitted by [[WP:COMPUNITS]], if WP benefits from removing ambiguity (and it does) follow [[WP:IAR]]. [[User:Dondervogel 2|Dondervogel 2]] ([[User talk:Dondervogel 2|talk]]) 10:50, 28 September 2017 (UTC)

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== Data cable ==

I've searched (CTRL+F) the article for info about the cable used for data transmission, but found nothing. Am I correct about the lack of information about this on the article?
If I am, then the article obviously should be expanded on that matter.
--[[User:MisterSanderson|MisterSanderson]] ([[User talk:MisterSanderson|talk]]) 12:40, 21 December 2018 (UTC)
:Actually the word cable does not appear in this article. Details of the more inclusive term "interface" also are not coverred. IMO this makes sense since the article is mainly about the disk and not the drive. Some general drive aspects are coverred in [[Floppy_disk#Operation|Section 2.2]] including link in that section to the [[Floppy-disk_controller|floppy disk controller]] article which should be sufficient and adding details about interfaces and multiple cables to this article seems inappropriate. BTW the [[Floppy-disk_controller|floppy disk controller]] article could use more detail on the FDD side of the interface such as more detail about the several cables and interfaces but IMO that is the appropriate place for such info, not this article [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 19:19, 21 December 2018 (UTC)
::{{U|Tom94022}}, the words "cable" and "interface" doesn't appears on the article [[Floppy-disk controller]] either. The title "[[Floppy disk drive]]" is a redirect for [[Floppy disk]], so it would be expected for that article to cover the drive details also. Otherwise, the redirect is misleading.--[[User:MisterSanderson|MisterSanderson]] ([[User talk:MisterSanderson|talk]]) 15:34, 24 January 2019 (UTC)
:::{{U|MisterSanderson}}, both "cable" and "interface" are implicit in [[Floppy-disk controller]]. Perhaps u could add them there and then fix the redirect either to the specific section of this article, or to the controller article or make the redirect into a disambiguation pointing to the section of this article and to the controller article. In any event expanding this article to cover "cable" and "interface" IMO doesn't make sense. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 20:44, 24 January 2019 (UTC)
:::I started to put some material into [[Floppy-disk controller]]; please feel free to further improve that article. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 23:04, 24 January 2019 (UTC)

== Floppy disk, drive? ==

Dear writer,

In this article only the content is addressed. But how about the device?
Regards.
[[Special:Contributions/145.129.136.48|145.129.136.48]] ([[User talk:145.129.136.48|talk]]) 09:41, 12 June 2020 (UTC)

== Coercivity ==
<!-- moved to end of talk section; improperly inserted at the front -->
It is surprising that this article does not mention one of the most critical aspects of digital magnetic madia - coercivity. In fact, the main difference between DD and HD floppies is the coercivity of the magnetic material used in those media. Was this omission done on purpose? It would seem so, since the Wikipedia article is so long that an accidental omission seems unlikely. Or is this a monumental failure? <!-- Template:Unsigned --><small class="autosigned">—&nbsp;Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Blind cyclist|Blind cyclist]] ([[User talk:Blind cyclist#top|talk]] • [[Special:Contributions/Blind cyclist|contribs]]) 01:16, 14 August 2020 (UTC)</small> <!--Autosigned by SineBot-->
:Not so much a failure as not viewed as particularly relevant in this article and covered elsewhere, see [[List_of_floppy_disk_formats#Physical_composition]]. Please feel free to add something if u deem it necessary. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 21:33, 14 August 2020 (UTC)
== "Disk Hacker" listed at [[Wikipedia:Redirects for discussion|Redirects for discussion]] ==
[[File:Information.svg|30px]]
A discussion is taking place to address the redirect [[:Disk Hacker]]. The discussion will occur at [[Wikipedia:Redirects for discussion/Log/2020 August 20#Disk Hacker]] until a consensus is reached, and readers of this page are welcome to contribute to the discussion. <!-- from Template:RFDNote --> [[User:Steel1943|<span style="color: #2F4F4F;">'''''Steel1943'''''</span>]] ([[User talk:Steel1943|talk]]) 08:01, 20 August 2020 (UTC)

== Why no mention of floppy disc as a common alternative? ==

Given Maxwell, Hitatchi, Zipdisc, Sega and Amsoft all had floppy discs (not disks), present with floppy disc drives in literally millions of home computers (sega, tatung einstein, amstrad cpc, zx spectrums) why is there no mention in this article of floppy discs? [[Special:Contributions/120.21.212.143|120.21.212.143]] ([[User talk:120.21.212.143|talk]]) 14:13, 2 February 2022 (UTC)
:Probably because of the billions of ''disks'' and hundreds of millions of ''disk drives'' as labeled by the rest of the various vendors in the three industries (media, drive and system). And there is also ANSI, other standard's groups and industry analyst exclusive usage of ''disk.'' I suppose a note along the lines of "occasionally spelled ''disc,''" with references that establish enough volume to justify inclusion would be appropriate. Note that Iomega's usage of disc was trademarked to distinguish the ZIP Disc so it really doesn't count towards occasional spelling of the word. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 19:54, 2 February 2022 (UTC)

== Use unambiguous prefixes again ==

In 2017 I wrote:
{{tqb |text=The capacities stated in this article are difficult to understand since they are a mixture of IEC decimal and binary prefixes. I would like to edit the article so that capacities are always stated in unambiguous IEC binary (e.g., KiB) or decimal (e.g. kB) prefixes. ... | source=[[Talk:Floppy_disk#Use_unambiguous_prefixes?]]}}
There wasn't much support then and the consensus seemed to be to use the prefixes of the source and live with ambiguity. A comment to that effect is embedded in the section of the article. {{ping|ShadyCrack}} in a recent edit, now reverted, converted all of the values with IEC decimal prefix ''kB'' to values with conventional binary prefixes, ''KB.'' Going all conventional binary prefix is one way to resolve the ambiguity but if we are going to convert units such conversion probably should be flagged in some form. Personally I would prefer IEC Binary and Decimal prefixes but going all conventional, so annotated, works too. Comment? [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 18:41, 21 February 2022 (UTC)

I found the 23FD, 33FD, and 43FD presentation of size rather confusing in the context of this table, so I was attempting to convert to KB as is used in the rest of the table and in the [[List of floppy disk formats]] where I confirmed the values. I think these three should be presented as KB to be consistent with the rest of the table.

I did not appreciate the other two "kB" references potentially literally meant 1000 bytes, my bad. [[User:ShadyCrack|ShadyCrack]] ([[User talk:ShadyCrack|talk]]) 19:37, 21 February 2022 (UTC)

:Wikipedia is not a reliable source. For example, an IBM 1981 JRD article, "The IBM Diskette and Diskette Drive" gives the 23FD, 33FD, and 43FD capacities as 81,644 bytes, 242,944 and 568,320 bytes respectively. In these cases kB is appropriate and there is no basis for conversion to KB. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 01:08, 22 February 2022 (UTC)

:I think the table should be updated to use the current binary standards of kiB and MiB, or at the very least include a footnote on the standard used. For the formatted capacity anyway, the marketed capacity should use whatever it was originally marketed as. [[User:StuartH|StuartH]] ([[User talk:StuartH|talk]]) 11:24, 4 March 2023 (UTC)

Generally I prefer KB over KiB per [[WP:COMPUNITS]], but given some of the mixed units in the article, I could see the argument for conversion to KiB and MiB to improve clarity. [[User:ShadyCrack|ShadyCrack]] ([[User talk:ShadyCrack|talk]]) 15:12, 4 March 2023 (UTC)
::Before we start on such a project there needs to be consensus here on doing it. Right now it is 2 in favor of unambiguous prefixes and one neutral. Given the number of conventional [[binary prefix]]es zealots on Wikipedia we probably need 5 to 10 in favor of such a rewrite before we dare attempt. I suppose we could ping the editors who have contributed the most to this article to see if there is such a consensus. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 18:01, 4 March 2023 (UTC)

Upon closer review, the article appears consistent with KB = 1024 and kB = 1000. There are some confusing MB references that are worth clarifying. E.g. 1.68 MB and 1.2 MB are not MiB or decimal MB, they are same as "1.44 MB" which is explained or the unambiguous 1,440 KB is used. 1.68 MB could be 1,680 KB, and 1.2 MB could be 1,200 KB. I support leaving the article as KB for readability. But potentially note at the start of the article all KB are 1024 and kB are 1000 bytes. And we clarify anything else as needed. [[User:ShadyCrack|ShadyCrack]] ([[User talk:ShadyCrack|talk]]) 15:00, 5 March 2023 (UTC)

== Inconsistent fractions ==

This article currently uses a mix of decimal and fractions to represent physical size (e.g. 3.5-inch and {{frac|3|1|2}}-inch). Except when quoting a source, the style should be consistent throughout the article. We should also establish a standard display type used throughout the article. Last time I checked, section headings and links should not contain {{tl|Frac}} as the template is not compatible with URL formatting, but <code><nowiki><sup></nowiki></code> and <code><nowiki><sub></nowiki></code> may work for this purpose instead. According to [[MOS:FRAC]], precomposed fraction characters should be avoided, except for articles that limit usage to quarters and halves. Looking among the headings, I didn't find a discussion of consistency in this talk page's archive, nor as an [[:WP:HIDDEN|editor note]] in the article source, hence why I'm bring this up. <span class="nowrap">&#8212;&#160;[[User:CJDOS|CJDOS,&#160;Sheridan,&#160;OR]]&#160;([[User talk:CJDOS|talk]]) 01:26, 12 November 2022 (UTC)</span>
{{FYI|reason=There is a related discussion at [[Template talk:Fraction#Unwanted plus sign]]. &#8212;&#160;[[User:CJDOS|CJDOS,&#160;Sheridan,&#160;OR]]&#160;([[User talk:CJDOS|talk]]) 02:33, 12 November 2022 (UTC)}}

:This has irked me also, would be good to bring consistency. Do you have a recommendation between the three options? I probably prefer the precomposed, although deprecated. With 3.5-inch being my second choice, though most instances are currently fractions. I'm sure plenty of opinions on this one. [[User:ShadyCrack|ShadyCrack]] ([[User talk:ShadyCrack|talk]]) 02:35, 12 November 2022 (UTC)
::I believe article titles currently use precomposed characters unless such a character is unavailable. I noticed unwanted plus signs in two of the [[Floppy disk]] article's section headings, due to the use of the template in the headings. I decided to leave them for the moment, and link to the related discussion in the FYI above. Regarding the article's text, I would prefer <ins>decimals over both</ins> {{tl|Frac}} <ins>and</ins> over the precomposed characters <ins>as the most common method of labeling diskette sizes</ins>, but I'm not trying to argue for, nor against it; just consistency. <span class="nowrap">&#8212;&#160;[[User:CJDOS|CJDOS,&#160;Sheridan,&#160;OR]]&#160;([[User talk:CJDOS|talk]]) 03:05, 12 November 2022 (UTC)</span> <span class="nowrap">(edited 06:12, 13 November 2022 (UTC))</span>
::I have removed the {{tl|Frac}} from the section headings per [[MOS:NOSECTIONLINKS]] (template transclusion). In doing so, I chose decimal, which is in keeping with the section anchors. Further, I've usually seen diskette sizes in decimal, not fractions, so I've changed my preference. <span class="nowrap">&#8212;&#160;[[User:CJDOS|CJDOS,&#160;Sheridan,&#160;OR]]&#160;([[User talk:CJDOS|talk]]) 05:58, 13 November 2022 (UTC)</span>
:::Stylistically I have preferred fractions of either type but upon looking over the literature I think decimals would be consistent with various authorities such as ANSI, Disk/Trend, etc. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 07:43, 13 November 2022 (UTC)
:::BTW I think the problem is we all speak fraction, it is a "three and one half inch drive" not a "three point five inch drive," so some of us then use fractions in text. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 07:45, 13 November 2022 (UTC)

== Nearly square diskettes ==

AFAIK the 8-inch and 5.25-inch diskettes were square and the 3.5-inch diskette was nearly square so as to prevent wrong way insertion. I'm pretty sure I am correct and don't want to waste too much time researching this but if anyone knows better please correct me. Accordingly, the generic description, "square or nearly square" is correct and more accurate than merely "nearly square". {{ping|fgnievinski}} insists upon the latter which I believe to be inaccurate and have now [https://en.wikipedia.org/enwiki/w/index.php?title=Floppy_disk&type=revision&diff=1127068889&oldid=1126668303 reverted him twice]. Let's have some discussion before we get to [[WP:3RR]]. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 19:06, 12 December 2022 (UTC)

:The distinction is irrelevant, esp. for the lead; disquettes were square for all practical purposes; we're not geometers discussing oblong rectangles vs. squares. [[User:Fgnievinski|fgnievinski]] ([[User talk:Fgnievinski|talk]]) 20:09, 12 December 2022 (UTC)
:Given the two most popular disk sizes, 5.25" (square) and 3.5" (not square), I support leaving as written "square or nearly square". While I appreciate [[MOS:LEADCLUTTER]], it seems strange to otherwise imply a 3.5" disk as square which is not, by design, square. [[User:ShadyCrack|ShadyCrack]] ([[User talk:ShadyCrack|talk]]) 23:36, 12 December 2022 (UTC)

== Spelling ==
== Spelling ==


Is there any significance to "Floppy Disk" spelled with a "k" vs. "Compact Disc" spelled with a "c"? [[Special:Contributions/24.51.192.49|24.51.192.49]] ([[User talk:24.51.192.49|talk]]) 04:24, 19 January 2023 (UTC)
Is there any significance to "Floppy Disk" spelled with a "k" vs. "Compact Disc" spelled with a "c"? [[Special:Contributions/24.51.192.49|24.51.192.49]] ([[User talk:24.51.192.49|talk]]) 04:24, 19 January 2023 (UTC)
:"Compact Disc" is trademarked, "Floppy Disk" is not, the HDD folks adopted disk to avoid potential trademark issues with IBM and that carried over into FD. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 07:30, 19 January 2023 (UTC)
:"Compact Disc" is trademarked, "Floppy Disk" is not, the HDD folks adopted disk to avoid potential trademark issues with IBM and that carried over into FD. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 07:30, 19 January 2023 (UTC)
::If one reads HP manuals and marketing materials from the 1980s, the word was always spelled with a 'c'. Similar material from IBM spells with a 'k'. The 'k' won out at some point. Since the 'c' spelling was in use long before CDs were invented, I think it's doubtful that a concern over trademark issues was the cause. [[User:Crath|Christopher Rath]] ([[User talk:Crath|talk]]) 19:57, 1 January 2024 (UTC)
:::The decision was in the 1960s so HP materials from the 1980s are pretty much irrelevant. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 21:03, 1 January 2024 (UTC)

== 5.25 Floppies ==

The older "360K" floppies (and I'm speaking about IBM-style formatted capacities) had a reinforcing center ring where the drive would clamp the disk. This ring was eliminated on the 1.2M floppies. What was the original idea behind this and why was it deemed unnecessary on the very similar-looking 1.2M disks? [[Special:Contributions/57.135.233.22|57.135.233.22]] ([[User talk:57.135.233.22|talk]]) 05:23, 8 July 2023 (UTC)
:I'm pretty sure the ring was not standard on any 5¼-inch FD - AFAIC recall it was added by some vendors to prevent or reduce damage caused by the various FDD clamping mechanisms, which would then make the disk unreliable. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 21:00, 8 July 2023 (UTC)
::I'm looking at all the pictures of 5.25" disks in the article because I didn't believe you and I don't see any with that ring, so I guess you're right. "[[Mandela effect]]" or something. :) .... [[Special:Contributions/57.135.233.22|57.135.233.22]] ([[User talk:57.135.233.22|talk]]) 08:52, 10 July 2023 (UTC)


== Fraction characters ==
== Incorrect archive.org link for a lost citation ==


{{reply|Tayste}} Re: [https://en.wikipedia.org/enwiki/w/index.php?title=Floppy_disk&oldid=prev&diff=1165878106 this revert], what's the reason for preferring vulgar fraction characters in these section titles? "5.25" and "3.25" are already being used in subsection headers of [[Floppy disk#Sizes]]. Per [[MOS:FRAC]], articles that use vulgar fractions not on the approved list must use {{tl|frac}}, but this cannot be used in link targets, so using decimals in section headers makes it less awkward to link here from those articles and for automated scans to show they have been fixed. -- [[User:Beland|Beland]] ([[User talk:Beland|talk]]) 01:10, 18 July 2023 (UTC)
The SCS_2007 reference looks like this:


: Well, [[MOS:FRAC]] admits an acceptable exception "If ¼, ½, and ¾[k] are the only fractions needed" where [k] says these characters "are in ISO/IEC 8859-1 and work in screen readers". I think we want screen readers (and everyone else) to read these as "five and a quarter" and "three and a half" (rather than "five point two five" and "three point five") because that's what these floppy disks were generally called in their day. <i><b>[[User:Tayste|Tayste]]</b> ([[Special:Contributions/Tayste|edits]])</i> 03:28, 18 July 2023 (UTC)
<pre><ref name="SCS_2007">
::Very well, I have changed all the instances of {{tl|frac}} and decimal fractions to use the Unicode characters. The section headers actually have supplemental anchors with decimal fractions, so links from other articles should work fine. -- [[User:Beland|Beland]] ([[User talk:Beland|talk]]) 18:57, 25 July 2023 (UTC)
{{cite web
:::Thanks for making this change. The decision for consistency had been sitting out there for awhile. [[User:ShadyCrack|ShadyCrack]] ([[User talk:ShadyCrack|talk]]) 14:43, 10 August 2023 (UTC)
|author=(M)Tronics SCS
|date=2007-05-20
|title=Floppy-Disketten-Laufwerke
|trans-title=Floppy disk drives
|url=http://www.hardware-bastelkiste.de/floppy.html
|url-status=dead
|archive-url=https://web.archive.org/web/20170619194609/http://www.hardware-bastelkiste.de/index.html?floppy.html
|archive-date=2017-06-19
|access-date=2017-06-19
|language=de
}}</ref></pre>


== Single-sided 5¼" floppies and IBM-compatible PCs ==
The links themselves:


A user has recently questioned and summarily reverted part of an edit which added the information that [[flippy disk]]s (and single-sided floppy drives) were never common on IBM-compatible PCs. It's harder to google arcana that predate Google, but for clarity, this relates mainly to the 160KB (and 180KB) 5¼" floppy disk formats, i.e. those formats that [https://en.wikipedia.org/wiki/List_of_floppy_disk_formats#cite_ref-KB75131_31-1 show a 1 in the fourth column here]. The actual common 5¼" formats on IBM-compatible PCs were double-sided double density (DSDD, i.e. 320 or 360KB) and later double-sided high density (DSHD, 1,200KB). (The capacity expansion from 160 to 180K and 320 to 360K was a software upgrade with DOS 2.0 in 1983.) Everything else was relatively uncommon, but single-sided drives were ''especially'' rare on the PC because only [https://minuszerodegrees.net/5150/doco/IBM%20Product%20Announcement%20-%20IBM%20PC%205150.pdf the earliest 1981 announcement] referenced 160KB (i.e. single-sided double density, SSDD) drives. (Single ''density'' floppies were ''never'' a thing on IBM PCs.) When IBM PCs started shipping in volume, IBM had moved on to double-sided drives, which soon became pretty much the only option on IBM-compatibles. However, right around the same time, single-sided 5¼" floppy drives and disks were VERY common on HOME COMPUTERS, most notably the C64. Regarding the actual IBM PC, some of the best-respected [https://minuszerodegrees.net/5150/floppy_diskette/5150_floppy_drive_support.htm sources don't even mention single-sided] 160/180K floppy drives anymore, and for good reason: For practical purposes virtually every IBM PC with a floppy drive was double-sided capable.
# (dead) http://www.hardware-bastelkiste.de/floppy.html
# (archive.org) https://web.archive.org/web/20170619194609/http://www.hardware-bastelkiste.de/index.html?floppy.html


The repeated reversions are especially uncalled-for because [https://en.wikipedia.org/enwiki/w/index.php?title=Floppy_disk&diff=prev&oldid=1221413149 the relevant edit summary demonstrates] the reverting user doesn't even understand what is asserted, which even when assuming good faith is still at least a stark lack of reading comprehension. The assertion they contest was ''specifically about'' IBM-compatible PCs, so ''anything beyond'' PCs cannot possibly be a counterargument to it. Given that poor reading comprehension, I would also not be surprised if the disruptive repeat-reverter was confusing sides (single vs double) with density (mainly double vs high, on the PC).
That second link is incorrect, the page should be floppy.html not index.html with a parameter after it:
—[[User:ReadOnlyAccount|ReadOnlyAccount]] ([[User talk:ReadOnlyAccount|talk]]) 20:05, 29 April 2024 (UTC)
:There were two reversions to newly added material in the section which covers both 8-inch and 5¼-inch FDs and FDDs, both additions were unreferenced:
#Usage on "typically home" computers: These devices were shipped long before home computers were in any volume as shown by the referenced Disk/Trend reports, it is hard to justify "typically" without a reference and therefore it was deleted.
#Usage on IBM compatible PCs: While likely true the section relates to all usages and therefore this unreferenced assertion gives [[WP:UNDUE|undue weight] to this small and irrelevant market segment and therefore was deleted.
:{{ping|ReadOnlyAccount}} Please keep the ad hominem attacks to minimum - I did all your edits and do understand the differences between all the various FDs and FDDs. More than happy to see what other and polite editors have to say. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 22:14, 29 April 2024 (UTC)


== Remove tag bombing of the article? ==
# (archive.org fixed) https://web.archive.org/web/20170619194609/http://www.hardware-bastelkiste.de/floppy.html
{{Ping|‎Nightscream}} has added 27 unexplained and unjustified tags to this article. This is literally [[WP:TAGBOMB|tag bombing]], a form of [[WP:DE|disruptive editing]] for which he may be sanctioned if he continues. This is the [https://sigma.toolforge.org/usersearch.py?name=Nightscream&page=Floppy_disk&server=enwiki&max= only contribution] Nightscream has ever made to this article, but he is a prolific tag bomber, at least six articles fact tag bombed in the last three days [https://en.wikipedia.org/enwiki/w/index.php?title=Special:Contributions/Nightscream&target=Nightscream&offset=&limit=500 (at least 43 out of last 500 edits)]! As a contributor to this page, I am bothered by his littering the article with unexplained and unjustified fact tags. To the non-expert reader, it makes the page appear questionable when it is not. I'd like other editors interested in this article to comment on the merits of his tag bombing. While we try to reach consensus on the merits of this tag bombing, I have reverted the article to its original state which I understand to be the preferred status for dispute resolution. Comments please. [[User:Tom94022|Tom94022]] ([[User talk:Tom94022|talk]]) 21:58, 6 June 2024 (UTC)


:Fact tags are self-explanatory, so they don't need an explanation. I've been fact-tagging such sections for nearly two decades, without any problems, as have other members of the editing community here, as this is an accepted practice.
Alas archive.org then rewrites the URL to a different date, so I'm not sure if I should edit it as a drop in replacement; or update all of the dates (including today as an access-date because I've just read and confirmed it).


I'm a new user. Whats the best practice for changing/fixing this? [[User:BrushDamp|BrushDamp]] ([[User talk:BrushDamp|talk]]) 09:25, 22 February 2023 (UTC)
:As for [[WP:TAGBOMB]], I think you need to take a closer look at that pages, because that's an essay, not a policy nor guideline, so it's not likely to result in "sanctions." [[User:Nightscream|Nightscream]] ([[User talk:Nightscream|talk]]) 04:52, 7 June 2024 (UTC)

Latest revision as of 16:13, 23 December 2024

Former featured articleFloppy disk is a former featured article. Please see the links under Article milestones below for its original nomination page (for older articles, check the nomination archive) and why it was removed.
Main Page trophyThis article appeared on Wikipedia's Main Page as Today's featured article on May 13, 2004.
Article milestones
DateProcessResult
May 4, 2004Featured article candidatePromoted
December 23, 2006Featured article reviewDemoted
Current status: Former featured article

Spelling

[edit]

Is there any significance to "Floppy Disk" spelled with a "k" vs. "Compact Disc" spelled with a "c"? 24.51.192.49 (talk) 04:24, 19 January 2023 (UTC)[reply]

"Compact Disc" is trademarked, "Floppy Disk" is not, the HDD folks adopted disk to avoid potential trademark issues with IBM and that carried over into FD. Tom94022 (talk) 07:30, 19 January 2023 (UTC)[reply]
If one reads HP manuals and marketing materials from the 1980s, the word was always spelled with a 'c'. Similar material from IBM spells with a 'k'. The 'k' won out at some point. Since the 'c' spelling was in use long before CDs were invented, I think it's doubtful that a concern over trademark issues was the cause. Christopher Rath (talk) 19:57, 1 January 2024 (UTC)[reply]
The decision was in the 1960s so HP materials from the 1980s are pretty much irrelevant. Tom94022 (talk) 21:03, 1 January 2024 (UTC)[reply]

5.25 Floppies

[edit]

The older "360K" floppies (and I'm speaking about IBM-style formatted capacities) had a reinforcing center ring where the drive would clamp the disk. This ring was eliminated on the 1.2M floppies. What was the original idea behind this and why was it deemed unnecessary on the very similar-looking 1.2M disks? 57.135.233.22 (talk) 05:23, 8 July 2023 (UTC)[reply]

I'm pretty sure the ring was not standard on any 5¼-inch FD - AFAIC recall it was added by some vendors to prevent or reduce damage caused by the various FDD clamping mechanisms, which would then make the disk unreliable. Tom94022 (talk) 21:00, 8 July 2023 (UTC)[reply]
I'm looking at all the pictures of 5.25" disks in the article because I didn't believe you and I don't see any with that ring, so I guess you're right. "Mandela effect" or something. :) .... 57.135.233.22 (talk) 08:52, 10 July 2023 (UTC)[reply]

Fraction characters

[edit]

@Tayste: Re: this revert, what's the reason for preferring vulgar fraction characters in these section titles? "5.25" and "3.25" are already being used in subsection headers of Floppy disk#Sizes. Per MOS:FRAC, articles that use vulgar fractions not on the approved list must use {{frac}}, but this cannot be used in link targets, so using decimals in section headers makes it less awkward to link here from those articles and for automated scans to show they have been fixed. -- Beland (talk) 01:10, 18 July 2023 (UTC)[reply]

Well, MOS:FRAC admits an acceptable exception "If ¼, ½, and ¾[k] are the only fractions needed" where [k] says these characters "are in ISO/IEC 8859-1 and work in screen readers". I think we want screen readers (and everyone else) to read these as "five and a quarter" and "three and a half" (rather than "five point two five" and "three point five") because that's what these floppy disks were generally called in their day. Tayste (edits) 03:28, 18 July 2023 (UTC)[reply]
Very well, I have changed all the instances of {{frac}} and decimal fractions to use the Unicode characters. The section headers actually have supplemental anchors with decimal fractions, so links from other articles should work fine. -- Beland (talk) 18:57, 25 July 2023 (UTC)[reply]
Thanks for making this change. The decision for consistency had been sitting out there for awhile. ShadyCrack (talk) 14:43, 10 August 2023 (UTC)[reply]

Single-sided 5¼" floppies and IBM-compatible PCs

[edit]

A user has recently questioned and summarily reverted part of an edit which added the information that flippy disks (and single-sided floppy drives) were never common on IBM-compatible PCs. It's harder to google arcana that predate Google, but for clarity, this relates mainly to the 160KB (and 180KB) 5¼" floppy disk formats, i.e. those formats that show a 1 in the fourth column here. The actual common 5¼" formats on IBM-compatible PCs were double-sided double density (DSDD, i.e. 320 or 360KB) and later double-sided high density (DSHD, 1,200KB). (The capacity expansion from 160 to 180K and 320 to 360K was a software upgrade with DOS 2.0 in 1983.) Everything else was relatively uncommon, but single-sided drives were especially rare on the PC because only the earliest 1981 announcement referenced 160KB (i.e. single-sided double density, SSDD) drives. (Single density floppies were never a thing on IBM PCs.) When IBM PCs started shipping in volume, IBM had moved on to double-sided drives, which soon became pretty much the only option on IBM-compatibles. However, right around the same time, single-sided 5¼" floppy drives and disks were VERY common on HOME COMPUTERS, most notably the C64. Regarding the actual IBM PC, some of the best-respected sources don't even mention single-sided 160/180K floppy drives anymore, and for good reason: For practical purposes virtually every IBM PC with a floppy drive was double-sided capable.

The repeated reversions are especially uncalled-for because the relevant edit summary demonstrates the reverting user doesn't even understand what is asserted, which even when assuming good faith is still at least a stark lack of reading comprehension. The assertion they contest was specifically about IBM-compatible PCs, so anything beyond PCs cannot possibly be a counterargument to it. Given that poor reading comprehension, I would also not be surprised if the disruptive repeat-reverter was confusing sides (single vs double) with density (mainly double vs high, on the PC). —ReadOnlyAccount (talk) 20:05, 29 April 2024 (UTC)[reply]

There were two reversions to newly added material in the section which covers both 8-inch and 5¼-inch FDs and FDDs, both additions were unreferenced:
  1. Usage on "typically home" computers: These devices were shipped long before home computers were in any volume as shown by the referenced Disk/Trend reports, it is hard to justify "typically" without a reference and therefore it was deleted.
  2. Usage on IBM compatible PCs: While likely true the section relates to all usages and therefore this unreferenced assertion gives [[WP:UNDUE|undue weight] to this small and irrelevant market segment and therefore was deleted.
@ReadOnlyAccount: Please keep the ad hominem attacks to minimum - I did all your edits and do understand the differences between all the various FDs and FDDs. More than happy to see what other and polite editors have to say. Tom94022 (talk) 22:14, 29 April 2024 (UTC)[reply]

Remove tag bombing of the article?

[edit]

@Nightscream: has added 27 unexplained and unjustified tags to this article. This is literally tag bombing, a form of disruptive editing for which he may be sanctioned if he continues. This is the only contribution Nightscream has ever made to this article, but he is a prolific tag bomber, at least six articles fact tag bombed in the last three days (at least 43 out of last 500 edits)! As a contributor to this page, I am bothered by his littering the article with unexplained and unjustified fact tags. To the non-expert reader, it makes the page appear questionable when it is not. I'd like other editors interested in this article to comment on the merits of his tag bombing. While we try to reach consensus on the merits of this tag bombing, I have reverted the article to its original state which I understand to be the preferred status for dispute resolution. Comments please. Tom94022 (talk) 21:58, 6 June 2024 (UTC)[reply]

Fact tags are self-explanatory, so they don't need an explanation. I've been fact-tagging such sections for nearly two decades, without any problems, as have other members of the editing community here, as this is an accepted practice.
As for WP:TAGBOMB, I think you need to take a closer look at that pages, because that's an essay, not a policy nor guideline, so it's not likely to result in "sanctions." Nightscream (talk) 04:52, 7 June 2024 (UTC)[reply]