Problem with 3ware PATA with Tyan motherboard

From: Sam Przyswa (samp_at_arial-concept.com)
Date: 07/11/05 

Date: Mon, 11 Jul 2005 15:41:32 +0200

Hi,

We have big problems with a 3ware PATA RAID card 7506-4LP and Tyan
motherboard Thunder K8SR (S2881G2NR) 2 X 1.6Ghz Opteron, 3 X 160 Go
disks RAID-5, 1 Go RAM, and Debian 2.4.27-2-686-smp. When we have lot of
read/write as with updatedb, the system freeze up to 40 seconds and the
1 mn load average rise up to 10 !

After upgrade with a 2.6.11-1-686-smp (Debian) the new 3ware driver
seems solve the problem but the performances are poor, the 1 mn load
average is around 1 or 1.5 with CPU usage between 90 and 99% and an
updatedb on 17 Gb size rise the 1 mn load average up to 6.

We have the same config but with a Tyan S2469NG, 2 X Athlon 2600+,
kernel 2.4.26 SMP and the same 3ware 7506-4LP work fine.

Any ideas ?

Thanks in advance for your help.

Sam.