I've got an existing Solaris ZFS NAS/SAN device and for a couple of reasons I'm looking to effectively destroy and re-create the zpool. The catch is that I don't have anywhere to put the data elsewhere, so it effectively has to stay on the box while I do this.
There's 12x1TB 7.2k SATA drives which make up the zpool in 6 mirrored pairs. My plan is as follows:
- In mirrored pair one, remove one of the drives from the pool completely.
- Create a new zpool containing only this drive
- Repeat (1) for each of the other mirrored pairs, adding them to the new zpool.
- By this point, I'm left with two zpools of the same size, with no redundancy, but containing 6 drives each.
- Copy the data over to the new pool and verify (with a scrub, I guess?)
- Once the data is copied, destroy the old pool, and add the 6 drives to the new pool as mirrors to the existing 6 drives.
- Ensure all the filesystems are correct and have the right attributes
Is there any reason why this wouldn't work? If not, is there a different/better way I could be doing this?
Best Answer
Why do you need to rebuild the pool? How much data is actually contained in the pool? That will have a greater effect on your migration strategy than anything else. If it is possible to place the data on a single disk (e.g. 1 or 2 Terabytes), I'd do that rather than risk a stripe of unmirrored disks. But again, it depends on how much data needs to move.