PE2950, LSI SAS -> SATA very slow

Tim Small tim at seoss.co.uk
Fri Apr 30 03:06:01 CDT 2010


Adam Nielsen wrote:
> We have a PowerEdge 2950 with an "LSISAS1068E" controller, hooked up to 
> two Seagate 1TB SATA disks.  For some reason the performance of these 
> disks is quite poor - I'm lucky to get over 10MB/sec from them, when I 
> should be getting closer to 100MB/sec.
>
>   

Sorry - forgot to say... You could try disabling NCQ on the disks
(lsiutil, or in the BIOS menu, I think), to see if that helps sequential
reads....


Tim.

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