On Sun, 22 Apr 2001, Ross Vandegrift wrote:
> [snip technical details]
> > and i use hdparm -m16 -c1 -d1 -a8 on all hd's
> > so why do i only see 13mb/sec on the ultra33 controller
> > (i thought 28mb/sec would be possible on the ultra33 controller)
> I've used quite a few different UDMA disks and controllers on Linux.
> You're numbers are right in line with the highest performance I've
> been able to tweak out of 5400RPM drives. I don't know how much of a
> limitation Ultra66 would be, but I'll bet you could tweak out some
> more by going to 7200RPM drives (IBM 75GXP is generally considered to
> be the fastest IDE drive ever made). That's an expensive proposition
> if you've already bought 6*Maxtor 80's though...
ok i know the ibm's are faster
but the 'problem?' is that on the onboard controller the drives are
getting 13mb/sec and on the ultra66 promise controllers they get 28mb/sec
isn't the onboard controller a ultra33 which should also give me the
28mb/sec ?
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