2 Aug
2005
2 Aug
'05
8:24 a.m.
On Tue, Aug 02, 2005 at 10:48:16AM +0100, Steve Harris wrote:
I dont think its that simple, theres not a linear
mapping between the
sector numbers and the position on the disk, and in any case theres
multiple platters.
Multiple platters no problem: for performance reasons sequential sectors
are always read from all platters in one head position before moving the
head.
The mapping isn't plain linear, but it will follow a reasonably smooth
head movement or disk cache "elevator" algorithms won't work optimally,
nor will long sequential transfers.
Historically disk benchmarks used to show higher
performance near the
"start" of the disk (low numbers I guess)
Yes, so maybe I was wrong and the low numbers are at the edge and the
high numbers in the middle.
Overall I'd say it doesnt matter too much, modern
disk are fast enough
Agreed :-)
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