zpool import: volume FAULTED with corrupted data, is it possible to save some data?

Solution 1:

at first see what displays

zfs status

maybe pool is imported now and is 'busy' for another import. if yes, repair pool. if not, follow all bottom.

I found here some doc: http://docs.oracle.com/cd/E19253-01/819-5461/gbctt/index.html you should import damaged pool with autorepair at first make binary copy anywhere. buy some drive for future backups. the import following above doc:

zpool import -F vol4disks8tb

you should get message with I/O error, but info described lost last writed data. you must agree for recovery.

If it doesn't work, unfortunately you lost it all.

I found your last chance. Look at the page, there is described bug with your freenas. http://forums.freenas.org/index.php?threads/zfs-pool-import-corrupted-data.7804/

Solution 2:

First of all, make byte-level copies of those disks.

Then kick yourself for not having offsite backups.

Have you tried the zpool import -f command as recommended by your system?