Re: [Xen-users] RESOLVED: bad I/O performance with HP Smart Array RAID

[Thomas Aeby <aeby@xxxxxxxxxx>]

Timh B wrote:
> We are actually running quite a few hp servers with their E200i/p and 400P
> controllers and overall im happy with the performance ( this is debian
> etch, not really xen related) though we do have the BBWC module on all the
> servers, and write up to 250-300MB,2k iops+ 
That's great and it sounds promising. I'm not very eager to install BBWC 
since I saw quite a few posts stating that even with BBWC installed (and 
write cache enabled) they get a really poor throughput, i.e.:
http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1235589954133+28353475&threadId=1188496

Maybe this does not apply to SAS disks - I'm not sure. Are you running 
the controller with SAS disks?
Unfortunately I haven't been able to enable the drives internal write 
cache so far.
Best regards,
Tom
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