Ajat wrote:
Hello, We had a situation at customer site where one of the zpool
complains about missing devices. We do not know which devices are
missing. Here are the details:
Customer had a zpool created on a hardware raid(SAN). There is no
redundancy in the pool. Pool had 13 LUN's, customer wanted to
increase the size of and added 5 more Luns. During zpool add process
system paniced with zfs checksum error. After system rebooted, it did
not import pool and force import is complaining of missing devices.
Is it possible that you mistyped the 'zpool add' command and listed the
same device twice? If so, you are probably hitting 6414648 "zfs allows
overlapping devices to be added", which was fixed in snv_56.
I would like to know from community leaders our position on using
non-replicated zpools on hardware raid. I would really apreciate
recommended approach when H/W raid is involved.
ZFS will work well -- better than any other filesystem -- on hardware
RAID even without using replication at the zpool level. There are
additional benefits (beyond those offered by other filesystem / volume
manager / hardware RAID) available to you by doing some replication at
the zpool level (namely, more types of hardware errors can be corrected).
--matt
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