I'm pretty sure that this bug is fixed in Solaris 10U5, patch 127127-11 and
127128-11 (note: 6462690 sd driver should set SYNC_NV bit when issuing
SYNCHRONIZE CACHE to SBC-2 devices). However, a test system with new 6140
arrays still seems to be suffering from lots of cache flushes. This is verified
by setting "zfs_nocacheflush=1" and seeing noticeable improvement in
performance. Can someone verify that this fix is indeed in the above release
and patch set. If so, then are there parameters that need to be set for this
to be active or is there firmware or other updates that need to be loaded into
this new array? Any help appreciated.
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