Re: DIOC{G,S}STRATEGY not implemented for all disk devices

["Perry E. Metzger" <perry%piermont.com@localhost>]

Gary Thorpe <gathorpe79%yahoo.com@localhost> writes:
> --- John Nemeth <jnemeth%victoria.tc.ca@localhost> wrote:
>> Do these devices work using concentric cylinders similar to the way
>> magnetic media works, or do they use the one long spiral track the
>> way most optical media (and old vinyl records) work?
>
> Optical disks are...disks.[...]

John is (correctly) pointing out that the access characteristics for
CDs are not like those for magnetic disks because there is one long
track instead of a sequence of concentric tracks. This changes many
things, such as the seek time you can reasonably expect. His question
about whether DVDs operate the same way is a sensible one. So, are
they like CDs or not?

-- 
Perry E. Metzger                perry%piermont.com@localhost