Low performance of the IDE on the SIS550
nathanael at gnat.ca
Thu Oct 3 13:50:00 CEST 2002
On Thursday, October 3, 2002, at 10:05 AM, Yves Godin wrote:
> At 10:50 AM 10/3/02 -0400, you wrote:
>> Have you tried hdparm /dev/whateverX (or hdparm -t /dev/whateverX)?
>> This will give you a more
>> accurate result (IMHO) and it will allow you to set the DMA settings
>> on the drive.
> Yes, I do. And the results are very close to those that I got with dd.
> The problem whith hdparm
> is that it only gives the performance in reading not in writing.
try hdparm -Tt device
for both read & writes.
> I found why I cannot set the UDMA mode 3/4/5. My board has a 44 pin
> ide connector and the
> cable that come with it convert from 44 pins to a 40 pins. To be able
> to set the UDMA mode 3/4/5,
> I must used a 80 wires cable. I try on another "slow" PC and there not
> a great difference of
> performance between the UDMA mode 2 and the UDMA mode 5.
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