On 01/14/2011 02:51 PM, Stan Hoeppner wrote:
Make sure the write cache on the P600 (what size is it BTW?) is enabled and that
the BBU is in working order. Also make sure the P600 is disabling the write
caches on the drives themselves. Then...
Write cache is enabled on the controller, the size is 512MB, BBU is in
good conditioned (checked with the HP utility). How do I check the
write cache on the drives?
Mount with 'nobarrier' so XFS isn't interfering with the hardware cache
performance of the P600. With barriers enabled (the default) XFS will
periodically flush the cache on the RAID card causing write performance problems.
Already using nobarrier.
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