On Fri, Jun 21, 2002 at 05:48:27PM +0100, David Laight wrote:

 > OTOH with modern disks that have 'voice coil' head motors
 > rather than 'stepper motors' track-track seek times are
 > not as dependant on the number of tracks being skipped.

OTOOH, with modern disks that support tagged queueing and can
reorder requests themselves, it's not clear we should use disksort
at all.

(Note, not all disks that support tagged queueing can reorder
requests, and not all that can are configured to do so -- it's
a mode page parameter, generally.)

-- 
        -- Jason R. Thorpe <thorpej@wasabisystems.com>