LSI 1064E poor performance

[Scott Long]

Marko Lerota wrote:
> I have new IBM X3250 with onboard LSI 1064E SAS/RAID controller.
> 
> when I do 
> dd if=/dev/da0 of=/file.dd bs=1m count=1000 
> 
> I get 10MBps transfer rate and tps 99 from iostat 
> 
> when raid is not configured on onboard controller but enabled,
> the tps value goes to 200 but it's to slow also. What should I do?
> 
> The OS version is 6.3 Release i386 GENERIC 
> 
> I tried with 7.0RC1 and the tps goes to 500 when raid is not 
> configured. So it's better but not enough. 
> 

Go to the BIOS and turn on the cache for the array.

Scott