PE2950, LSI SAS -> SATA very slow

Adam Nielsen adam.nielsen at
Mon May 3 19:25:37 CDT 2010

>> 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.
> 4k blocks?

Interesting reading, I hadn't heard about that before.  Unfortunately 
no, according to the Seagate docs on the disks they are using 512 byte 
physical sectors.


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