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SubjectRe: Slow UDMA rate on ALI1543
Ummm... 12.65meg/sec is what you are going to get on that drive...
doesn't matter which controller it is on. Why do you see that as slow???
It's the fastest IDE drive I've seen (shoot and it gives the same
performance as the IBM 4gig 7200rpm SCSI U2W... to no surprise since you
are talking drive performance and not controller performance). Also the
ALI support should tune the controller so you don't have to use hdparm
under most circumstances.

Which you can grab the vanderbilt patches for the 2.2.x kernels if you
don't want to go to 2.3.x.

Brian Macy

Diego Calzolari wrote:
>
> Hi, I've got a K6III-400 with Asus P5A and IBM 10Gb, 7200rpm ide.
> I've got to use Kernel 2.3.x because it's the only supporting ALI-1543 udma
> feature, but I've found no difference using hdparm -X34 and -X66 (btw hdparm is
> rev3.5 and has been recompiled after kernel build): just the same transfert
> rate, T=64_Mb/s and t=12.65Mb/s.
> It's not just a matter of numbers: the system has no speed improvement at all
> (ie: tsarting X, compiling the kernel, etc.)
> /proc/ide/ide0/hda/driver shows ide-disk version 1.09 and /proc/ide/ali is
> attacched. What can be the reason for this?
> Thanks in advance for help. If this is not pertinent to the list, please reply
> directly (I'm not a subscriber) and accept my apologies
>
> ------------------------------------------------------------------------
> Name: ali
> ali Type: Plain Text (text/plain)
> Encoding: base64

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