Date: Wed, 4 Jun 2014 08:38:47 -0400 From: Janos Dohanics <web@3dresearch.com> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: zpool offline - no such device Message-ID: <20140604083847.ce10b00c6d2ac6e934965648@3dresearch.com> In-Reply-To: <9D00B0534C785E4CE751D6F7@[192.168.1.50]> References: <20140603104416.a13299f4a2bbdbdb36782dee@3dresearch.com> <9D00B0534C785E4CE751D6F7@[192.168.1.50]>
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On Tue, 03 Jun 2014 17:55:46 -0400
Daniel Staal <DStaal@usa.net> wrote:
> --As of June 3, 2014 10:44:16 AM -0400, Janos Dohanics is alleged to
> have said:
>
> > NAME STATE
> > READ WRITE CKSUM
> > vol1 DEGRADED 0
> > 0 0 raidz1-0
> > DEGRADED 0 0 0
> > gptid/e433f9c3-0545-11e1-812d-8c89a53220c1 ONLINE 0 0 0
> > gptid/e485eeba-0545-11e1-812d-8c89a53220c1 FAULTED
> > 49 260 0 too many errors
> > gptid/e4d8ee9d-0545-11e1-812d-8c89a53220c1 ONLINE 0
> > 0 0
> >
> > errors: No known data errors
> >
> > From the output of "gpart list",
> > gptid/e485eeba-0545-11e1-812d-8c89a53220c1 corresponds to ada1p2.
> >
> > So, using the example from the handbook, I tried:
> >
> ># zpool offline vol1 ada1
> > cannot offline ada1: no such device in pool
> >
> > Why is it that zpool doesn't know about the ada1 device?
>
> Because ada1 isn't in your pool -
> 'gptid/e485eeba-0545-11e1-812d-8c89a53220c1' aka 'ada1p2' is.
>
> That is only one of the partitions of ada1 - there may be more.
> (It's entirely possible that *all* of the devices in the zpool are on
> ada1...) In fact there is likely at least one more: ada1p1.
Thanks for your reply.
> Before you do anything else, it's probably a good idea to figure out
> exactly what is on that disk and how many partitions it has. Pulling
> it out may not affect the zpool - but it may break other things in
> your system, depending on what's on there.
Here is what gpart says about ada1:
# gpart show -p
[...]
=> 34 1953525101 ada1 GPT (931G)
34 94 - free - (47k)
128 4194304 ada1p1 freebsd-swap (2.0G)
4194432 1949330696 ada1p2 freebsd-zfs (929G)
1953525128 7 - free - (3.5k)
> > For the failing drive, "zdb" gives:
> >
> > guid: 16455153587833556178
> >
> > Should I try "zpool offline vol1 [guid]"?
>
> I would try `zpool offline
> gptid/e485eeba-0545-11e1-812d-8c89a53220c1` - that's what zfs calls
> the disk. But I'm not entirely sure about it either
> - it would be a lot easier if these partitions had gpt lables, which
> I know work well with ZFS.
>
> > When I'm replacing the failing drive with a new one (in the same USB
> > slot), can I expect "zpool replace vol1 ada1" to work?
>
> That should probably work - but remember the mention above of working
> out what *else* is on that drive. This command would take the whole
> disk for ZFS, and you may want to replace the other partitions of the
> bad disk with something.
>
> Daniel T. Staal
So, I should do gpart backup/restore first?
--
Janos Dohanics
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