Re: AMD SP5100 SATA low perfomance

["Rus V. Brushkoff" <brushkoff@xxxxxxxxx>]

 I will do the tests with another drive (from WD) today. But I've
fogot to say that I have another S8005 m/b with SP5100 that working
perfectly with these particular Hitachi drives (please see boot log
for it in dmesg-good at the same URL). So the problem can be in init
procedure for AMD south bridge or SATA controller. The differences
between m/b is very little - working has onboard audio, not working
hasn't. The diff in boot log is present too in file diff.txt

>>  I'm observing the problem with AMD SP5100 SATA controller. The
>> problem appears as very low (2-3MB/s) write perfomance. Reading drops
>> too, but not such dramatically (from 100Mb/s on other hardware to
>> 50-60Mb/s on SP5100). This problem is checked on several kernels
>> (2.6.x, 3.2.x, 3.4.x) including latest 3.5 and with all possible SATA
>> BIOS settings. The hardware is Tyan S8005 m/b (latest BIOS v1.03), AMD
>> X6 1045T, 8GB ECC memory and Hitachi HTS725050A7E630 drive.  Moreover
>> - I've checked 2 different identical boxes - it is 100% reproducable
>> on both.
>
> Have you tried doing the same test on the same mobo but with another
> drive, possibly by another manufacturer? Do you see the same write
> slowdown with the second drive too?
>
> Thanks.
>
> --
> Regards/Gruss,
>     Boris.



-- 
Rus
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