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 -- This messages posted from opensolaris.org