Upgrading from 8.3 to 9.1 zfs pool can't attach

[Freddie Cash]

Do you have RAID arrays on both the Intel and the Sil controllers?  Or just
the Intel?  I think you may be getting bit by the "graid now in kernel, old
metadata being read, graid taking control of disks it shouldn't be" issue.

You need to manually clear the RAID metadata from all your non-RAID (ie,
used for ZFS) disks.

See the graid man page for details.  And the -stable mailing list archives.

Once you've cleared the RAID metadata from the ZFS disks, ZFS will be able
to pick them up correctly.

-- 
Freddie Cash
fjwcash at gmail.com