24 Dec
2006
24 Dec
'06
10:33 p.m.
Well, if I had a drive with, say, 2 surfaces, 2 heads
per surface,
and 100 positions those heads could be moved to, I'd probably call it
100 cylinders, 4 heads, since logically it's the same as 4 surfaces
with one head per surface.
Only if the (physical) tracks accessible by the two heads on a given
surface are disjoint. If the heads range over the same physical tracks
and exist either to just give either lessened rotational latency or to
give simultaneous access to distinct physical tracks, then it is
logically very much different from a 4-surface 1-head/surface drive,
and there is then no accurate way to describe it except as 2 surfaces
with 2 heads each.
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