> > The above IBM slows down by a factor of ~2 on the inner tracks.
> 
> Isn't this true for SCSI disks as well?
> 
> I have two IDE disks on the same cable and they read/write over 22 MB/s
try doing lots of random reads from one drive and then measure transfer
from the other?
> simultaneously.  I get over 20 MB/s through RAID1 from these two disks.
> I have never had an SCSI device that could beat this ;-)  (Yeah, they
> do exist, but they are expensive and need an UW controller..)

there are SCSI drives with 58MB/s transfer (IBM ultra-160 10000rpm drive).
but it's MUCH MORE expensive.