I'd prefer letting the drive be our friend, and throw requests
at it in any order. Let the drive sort it all out, instead
of trying to beat it at its own game.
After all, only the drive knows what's going on inside
it -- things like how many sectors on which cylinder, which
blocks are automatically remapped to the other edge of
the disk, etc. The 'disk' may even be a flash memory card
with an IDE or SCSI interface.
Of course, we don't live in a perfect world yet, so I guess
it does not hurt to give (IDE) drives a little helping hand
in form of the elevator algorithm.
Johan Myreen
jem@iki.fi
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