On Tue, March 23, 2010 12:00, Ray Van Dolson wrote: > Kind of a newbie question here -- or I haven't been able to find great > search terms for this... > > Does ZFS recognize zpool members based on drive serial number or some > other unique, drive-associated ID? Or is it based off the drive's > location (c0t0d0, etc). > > I'm wondering because I have a zpool set up across a bunch of drives > and I am planning to move those drives to another port on the > controller potentially changing their location -- as well as the > location of my "boot" zpool (two disks). > > Will ZFS detect this and be smart about it or do I need to do something > like a zfs export ahead of time? What about for the root pool?
ZFS recognizes disks based on various ZFS special blocks written to them. It also keeps a cache file on where things have been lately. If you export a ZFS pool, swap the physical drives around, and import it, everything should be fine. If you don't export first, you may have to give it a bit of help. And there are pathological cases where for example you don't have a link in the /dev/dsk directory which can cause a default import to not find all the pieces of a pool. -- David Dyer-Bennet, d...@dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
