zpool scrub errors on 3ware 9550SXU

[Kip Macy]

The reason why the results on 7-STABLE are so important is that it is
now running the exact same version of ZFS as HEAD. So if you aren't
seeing checksum errors on 7-STABLE then the problem lies elsewhere in
the storage stack. There are so many things that could cause this that
I won't even speculate.

Thanks for the information. I'll try to figure out how to narrow it down.

-Kip