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This is an old revision of this page, as edited by 77.190.41.50 (talk) at 21:11, 23 June 2011. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Rotations per minute?

Does anybody have an idea how fast a DVD disk is actually spinning? I guess this information could be inserted into the "DVD drive speeds" table. -- 16:24, 4 July 2010 (UTC) —Preceding unsigned comment added by 92.229.143.63 (talk)

IM NOT SURE BUT IT IF CAME OUT SHOOTING AT YOU IT WOULD CUT YOUR HEAD OFF IF IT WAS POINTING AT YOUR HEAD YEA THATS HOW FAST IT IS — Preceding unsigned comment added by Dungeon master 45 (talk • contribs) 04:23, 16 January 2011 (UTC)[reply]

As a Video Game media

I'm curious why this article doesn't mention that most modern video games are on DVDs... —Preceding unsigned comment added by 216.136.4.136 (talk) 15:05, 9 July 2010 (UTC)[reply]

Because game storage on DVDs are data storages anyway. There is no fundamental requirements of a data dvd to change for video games. Icepop4who (talk) 23:05, 18 January 2011 (UTC)[reply]

Sled

What is the sled motor and what does it do ?.--147.84.132.44 (talk) 10:57, 16 September 2010 (UTC)[reply]

the sled is this thing on the computer as its name suggest's its comes out like a sled and you put the disk on it — Preceding unsigned comment added by Dungeon master 45 (talk • contribs) 04:20, 16 January 2011 (UTC)[reply]
No, the sled is the box with the laser etc in it that gets dragged back and forth underneath the disc for rough positioning. The box contains the fine positioning drive for the lens which takes up the inaccuracy in the sled drive and also does the focussing. The 'coffee cup holder' is called the loading tray or something.Adx (talk) 04:20, 19 February 2011 (UTC)[reply]

Scheme

I suggest a draw (scheme) of the internal mechanism of a drive, with numbers. So the number can later be explained and/or named in the image caption and in the article text. For example, some parts to mark and explain: slide, spin and so on.--147.84.132.44 (talk) 11:02, 16 September 2010 (UTC)[reply]

Maintain

I suggest add a section or link about how to maintain the optical disc drive unit to avoid breakages (i.e. periodically use an laser lens cleaner. --147.84.132.44 (talk) 11:05, 16 September 2010 (UTC)[reply]

Technology section incorrect

The first paragraph says DVD's storage capacity over CD is due to the shorter wavelength which "permits a smaller pit to be etched on the media surface". This is wrong/misleading:

  • The closer track spacing is due to both the shorter wavelength and wider NA of the lens.
  • Smaller pits are being confused with track spacing (they can be both shorter and closer together).
  • The modulation (EFMPlus) on DVD is more efficient.
  • The optical changes don't "permit" smaller pits to be etched, they allow these to be read with adequate reliability (makes sense as-is but only if you already know the answer).
  • "pit etched on the media surface" could be clarified to say that it is on the information layer(s) on the inside of disc, not on the DVD itself (which many people would think is the "media").
  • The Blu-Ray Disc is the same - shorter wavelength, wider aperture, etc.

Most of the refs are here in Wikipedia, if I had time I would fix it myself right now. Adx (talk) 04:09, 19 February 2011 (UTC)[reply]

Time when DVD writers were introduced

Wouldn't that be a great addition to the article? (In short, of course, referring to the big article.) I think many people that "just" look for "DVD" will also be interested to find out when you could FIRST write to a DVD and when the first affordable writers appeared on the market. This is nowhere documented, not even in short terms. -andy 77.190.41.50 (talk) 21:11, 23 June 2011 (UTC)[reply]

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