From: Bill Morrow (penzance_at_gate.net)
Date: Sun Apr 23 2000 - 03:43:08 EDT
AFAIK one head at a time..
but, as mentioned in another thread, 17mm are 4900 or 5400 RPM and 12mm are 4200
RPM..
Michael Geary wrote:
> > A fatter drive by definition has a capacity and performance increase
> > over a thinner drive of equal media density and rpm. Because a 17mm
> > drive has more platters/heads, data is read/written faster when
> > compared to a 12.5 (or thinner) drive. A 17mm drive could have 5
> platters,
> > so 10 heads. Whereas a 12.5mm would have only 3 platters and 6 heads. 10
> > heads handles more data that 6. 40% more. That's a lot of real
> performance
> > where it counts. The thick drive stores 40% more data too.
>
> Do they read/write using multiple heads in parallel? I thought they used one
> head at a time, which would mean there's no speed advantage to having more
> platters. (And perhaps a slight speed disadvantage because the head assembly
> has more mass to move around.) Of course, I could be mistaken about this...
>
> -Mike
-- Happy trails...** Bill Morrow ** :-) WEB page http://thinkpads.com e-mail: bill_at_thinkpads.com, penzance_at_gate.net
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