Date: Thu, 22 Dec 2016 14:11:37 +0500 From: "Eugene M. Zheganin" <emz@norma.perm.ru> To: freebsd-stable <freebsd-stable@freebsd.org> Subject: cannot detach vdev from zfs pool Message-ID: <585B98C9.4070607@norma.perm.ru>
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Hi,
Recently I decided to remove the bogus zfs-inside-geli-inside-zvol pool,
since it's now officially unsupported. So, I needed to reslice my disk,
hence to detach one of the disks from a mirrored pool. I issued 'zpool
detach zroot gpt/zroot1' and my system livelocked almost immidiately, so
I pressed reset. Now I got this:
# zpool status zroot
pool: zroot
state: DEGRADED
status: One or more devices has been taken offline by the administrator.
Sufficient replicas exist for the pool to continue functioning in=
a
degraded state.
action: Online the device using 'zpool online' or replace the device with=
'zpool replace'.
scan: resilvered 687G in 5h26m with 0 errors on Sat Oct 17 19:41:49 201=
5
config:
NAME STATE READ WRITE CKSUM
zroot DEGRADED 0 0 0
mirror-0 DEGRADED 0 0 0
gpt/zroot0 ONLINE 0 0 0
1151243332124505229 OFFLINE 0 0 0 was
/dev/gpt/zroot1
errors: No known data errors
This isn't a big deal by itself, since I was able to create second zfs
pool and now I'm relocating my data to it, although I should say that
this is very disturbing sequence of events, because I'm now unable to
even delete the UNAVAIL vdev from the pool. I tried to boot from a
FreeBSD USB stick and detach it there, but all I discovered was the fact
that zfs subsystem locks up upon the command 'zpool detach zroot
1151243332124505229'. I waited for several minutes but nothing happened,
furthermore subsequent zpool/zfs commands are hanging up too.
Is this worth submitting a pr, or may be it does need additional
investigation ? In general I intend to destroy this pool after
relocation it, but I'm afraid someone (or even myself again) could step
on this later. Both disks are healthy, and I don't see the complains in
dmesg. I'm running a FreeBSD 11.0-release-p5 here. The pool was initialy
created somewhere under 9.0 I guess.
Thanks.
Eugene.
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