Re: [OFFTOPIC] Re: disk head scheduling
Helge Hafting (helge.hafting@c2i.net)
Thu, 25 Mar 1999 16:34:11 +0100
[...]
> Here's why. If the drive manufactors could read all tracks at the same
> time, they would do so. That would bump the drive speed from the current
> platter speed to N_HEADs * (platter speed), which would be extremely nice.
>
> However, they can't do that. The tracks within the same cylinder are not
> all at exactly the same place. Depending on which platter you are going for,
> the heads settle at a slightly different place. Very annoying that. If it
> weren't for that little problem, we could have 5 platter drives which were
> 65MByte/sec drives.
It is doable - with a servo per platter. Maybe that isn't necessary,
a piezoelectric fine-tune thing on each arm might be enough.
Helge Hafting
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