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DateSun, 15 Nov 1998 16:18:31 -0800 (PST)
FromTim Smith <>
SubjectRe: elevator algorithm bug in ll_rw_blk.c
On Sun, 15 Nov 1998, Vojtech Pavlik wrote:
> You could apply a two way elevator well if you knew about the physical
> characteristics of the drive. Unfortunately there is no way to find that out
> for most modern drives.

Actually, by analyzing timings on carefully selected request sequences, you
can figure out pretty much all of the physical characteristics of most
drives. See

http://www.ece.cmu.edu/~ganger/papers/

--Tim Smith


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