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Article #3105Re: Why optical disks are slow to seek; an idea for higher capacity disks
From: Ed Nather
Date: Wed, 05 Nov 1986 16:58
Date: Wed, 05 Nov 1986 16:58
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1462 bytes
In article <13645@amdcad.UUCP>, phil@amdcad.UUCP (Phil Ngai) writes:
> In article <1256@hoptoad.uucp> gnu@hoptoad.uucp (John Gilmore) writes:
> >
> >I don't understand why nobody has built magnetic disks that spin at
> >a constant speed, but vary the clocking of data to the disk so that
> >all the bits end up the same width on the media.
>
> This is an interesting idea to consider. One possible challenge is
> that of extracting the clock from the bits stored from the media.
Alternatively, just extract a synchronizing signal, and let the clock
frequency by determined by what track is being accessed. A simple
servo should be able to set the required clock frequency close enough,
but it would have to get in step.
--
Ed Nather
Astronomy Dept, U of Texas @ Austin
{allegra,ihnp4}!{noao,ut-sally}!utastro!nather
nather@astro.AS.UTEXAS.EDU
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!ut-sally!nather From: nather@ut-sally.UUCP (Ed Nather) Newsgroups: net.arch,net.periphs Subject: Re: Why optical disks are slow to seek; an idea for higher capacity disks Message-ID: <6241@ut-sally.UUCP> Date: Wed, 5-Nov-86 11:58:24 EST Article-I.D.: ut-sally.6241 Posted: Wed Nov 5 11:58:24 1986 Date-Received: Wed, 5-Nov-86 22:30:05 EST References: <1128@tekig5.UUCP> <5100141@ccvaxa> <amdcad.13214> <553@cubsvax.UUCP> <13645@amdcad.UUCP> Organization: U. Texas CS Dept., Austin, Texas Lines: 20