Date: Mon, 04 Jun 2012 21:00:15 +0100 From: Kaya Saman <kayasaman@gmail.com> To: freebsd-fs@freebsd.org Subject: Using ZFS as RAID0 - disk offline question Message-ID: <4FCD13CF.3010406@gmail.com>
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Hi, in ZFS when using a simple RAID 0 style array is there a way to recover a pool after a disk has gone down? Or remove a disk from the pool to shrink it? To be more specific this is what I'm simulating at the moment: zpool create ZPOOL_1 /mnt/disk1 /mnt/disk2 zpool status shows disk1 and disk2 as being part of ZPOOL_1 and ZPOOL_1 is ONLINE. However, if I should ever want to remove disk2 from the pool or if disk2 has gone down how would one go about getting the ZPOOL_1 back online? I am hoping that there is a solution to just running the pool with 1 disk. Or if the disk name changes ie. simulating a disk number to change after moving it to a different controller or so internally. I am just trying to see what would happen as RAIDZ or RAID1 is very good however what about RAID0 in the situation above. I guess one could call this as disaster recovery for the unprepared :-) In actual fact I have done this physically on a Mini-ITX NAS system (of course I have backups of everything) however, my point is to try to see if one disk goes down if the ZPOOL will still be able to function without the additional disk! - as commands such as remove and detach are unavailable in this mode...... Regards, Kaya
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