Page 1 of 1
Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 06 May 2016 22:52
by dclutter1
I have a raidz2 with 4 2tb drives. 2 of them went bad a few weeks ago and I replaced them with new drives.
Now I'm not sure what to do with the 2 new drives. They're recognized everywhere in the gui, zfs info, etc., but I'm not sure how to add them back. As I understand it, I can't
add disks to a current virtual device (right?). If I create a new virtual device with the 2 new disks, I won't have a raidz2 right?
Do I need to just backup and rebuild the vdev/pool?
I made a
thread about this in the disk/controller section but it has kind of died off, plus I feel like it may fit into this section better now anyway.
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 07 May 2016 09:33
by raulfg3
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 07 May 2016 16:03
by dclutter1
Right. I did that.
Now I have 2 new disks NOT associated with a vdev or a pool. What do I have to do to get them back into the raid?
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 07 May 2016 17:52
by raulfg3
Go to Disks|ZFS|Configuration|Synchronize and post screen capture of your detectec and real config
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 07 May 2016 20:57
by dclutter1
Thank you
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 07 May 2016 21:34
by raulfg3
sorry , not sure what can be next step, wait until other power user can help you.
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 07 May 2016 21:48
by b0ssman
i am still waiting for you to post the smart values of your drive.
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 07 May 2016 22:50
by dclutter1
b0ssman wrote:i am still waiting for you to post the smart values of your drive.
Why?
Don't you think it's considerably more important to re-establish redundancy before worrying about that?
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 08 May 2016 07:40
by b0ssman
because it looks like your other drives are dying as well and might have damaged the pool. then there is no point is trying to save the pool.
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 08 May 2016 19:42
by dclutter1
So since there's no way to add the 2 new disks back in, best bet is to rebuild the whole thing?
I began backing everything up from the beginning because I thought this might be the case.
Re: Replaced 2 of 4 disks in RZ2 now can't get them back into pool
Posted: 06 Jul 2016 19:43
by m_seitz
I assume you already solved your problem. But would it have been possible to clone the old failed drives onto the new ones? Usually, a failed drive has bad sectors or will only run with cooling (inside a freezer!), but most of the data can be accessed.
Cloning failed drives and putting the clones back into a raid should make things easier and minimise data loss, in case another drive fails during resilvering. The chances that the same blocks become inaccessible on several HDDs should be slim. Therefore cloning (if possible) could theoretically retain all data, even if every single HDD in a raid fails.
Or am I missing something here?