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- Newsgroups: sci.electronics
- Path: sparky!uunet!nwnexus!ole!ssave
- From: ssave@ole.cdac.com (Shailendra Save)
- Subject: Re: Life after CDs
- Message-ID: <1992Jul30.164545.10449@ole.cdac.com>
- Organization: CDAC, WA
- References: <3664@wzv.win.tue.nl> <1992Jul27.212455.18334@ole.cdac.com> <1992Jul29.175512.611@cmkrnl.com>
- Date: Thu, 30 Jul 1992 16:45:45 GMT
- Lines: 25
-
- In article <1992Jul29.175512.611@cmkrnl.com> jeh@cmkrnl.com writes:
- >In article <1992Jul27.212455.18334@ole.cdac.com>, ssave@ole.cdac.com
- >(Shailendra Save) writes:
- >> The dots are spaced out more as you go to the outer edge of the disc, since
- >> the radial speed increases as you go from inside to the outside. I wish they could
- >> decrease the speed of the disc as the laser pickup reaches the outside of the disc,
- >> and store more stuff on it. What do you think?
- >
- >What you're asking for is how CDs work *now*. That's why they're called
- >'constant linear velocity' (CLV). The rotational speed is reduced as the
- >pickup moves from inner to lower tracks. Thus the dots-per-linear-inch is the
- >same on all tracks, inner and outer.
- >
- > --- Jamie Hanrahan, Kernel Mode Consulting, San Diego CA
- >Internet: jeh@cmkrnl.com, hanrahan@eisner.decus.org, or jeh@crash.cts.com
- >Uucp: ...{crash,eisner,uunet}!cmkrnl!jeh
-
-
- Thanks all for the reply (replies). Is it possible to have the same CLV
- for magnetic discs? (as in the hard disks of computers?) Would have an interesting
- algorithm for sector mapping, but it should work, wouldn't you think?
-
-
- -Shailendra
- ssave@ole.cdac.com
-