On 01/05/2011 03:28 PM, Patrick H. wrote:
No, my drives are battery backed as well.
what drives are they, if I can ask? OCZ SSDs with supercapacitor maybe?
Do you know if they will really flush the whole write cache on sudden
power off? I read smoky sentences about this for the OCZ drives. In
certain points it seemed like the supercapacitor was only able to
provide the same guarantees of a HDD, that is, no further data loss due
to erase-then-rewrite-32K and flash wear levelling stuff, but was not
able to flush the write cache.
Did you try with e.g. a stream of simple databases transactions then
disconnecting the cable suddenly like this test
http://www.mysqlperformanceblog.com/2009/03/02/ssd-xfs-lvm-fsync-write-cache-barrier-and-lost-transactions/
?
Thank you
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