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. It is a potential data loss situation. I know that there 
are some bugs which are related to checkup and other related errors without 
replication. 

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.

Ajat
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