How long have you let the box sit?  I had to offline the slog device, and it
took quite a while for it to come back to life after removing the device
(4-5 minutes).  It's a painful process, which is why ever since I've used
mirrored slog devices.

-----Original Message-----
From: zfs-discuss-boun...@opensolaris.org
[mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Jan Hellevik
Sent: Friday, March 16, 2012 2:20 PM
To: zfs-discuss@opensolaris.org
Subject: [zfs-discuss] Cannot remove slog device

I have a problem with my box. The slog started showing errors, so I decided
to remove it. I have tried to offline it with the same result. Any ideas?

I have offlined the cache device, which happened immediately, but both
offline/remove of the slog hangs and makes the box unusable. 

If I have a ssh connection open, it will allow me to run commands like top
and dmesg, but if I try to open a new connection, it hangs after displaying
'Last login: .....'

I have mounted shares from the server, and I can access files (read, but not
write) on them without any problems.

The only thing that seems to work is powercycling the machine.

Any ideas out there?

OpenIndiana (powered by illumos)    SunOS 5.11    oi_151a    September 2011
hellevik@xeon:~$ zpool status
  pool: master
 state: DEGRADED
status: One or more devices are faulted in response to persistent errors.
        Sufficient replicas exist for the pool to continue functioning in a
        degraded state.
action: Replace the faulted device, or use 'zpool clear' to mark the device
        repaired.
  scan: scrub repaired 0 in 19h9m with 0 errors on Mon Jan 30 05:57:51 2012
config:

        NAME        STATE     READ WRITE CKSUM
        master      DEGRADED     0     0     0
          mirror-0  ONLINE       0     0     0
            c9t0d0  ONLINE       0     0     0
            c9t5d0  ONLINE       0     0     0
          mirror-1  ONLINE       0     0     0
            c9t1d0  ONLINE       0     0     0
            c9t6d0  ONLINE       0     0     0
          mirror-2  ONLINE       0     0     0
            c9t2d0  ONLINE       0     0     0
            c9t7d0  ONLINE       0     0     0
          mirror-3  ONLINE       0     0     0
            c9t3d0  ONLINE       0     0     0
            c9t4d0  ONLINE       0     0     0
        logs
          c8t5d0    FAULTED      0     0     0  too many errors
        cache
          c8t4d0    OFFLINE      0     0     0

errors: No known data errors

  pool: rpool
 state: ONLINE
  scan: scrub repaired 0 in 1h33m with 0 errors on Sun Jan 29 16:37:20 2012
config:

        NAME        STATE     READ WRITE CKSUM
        rpool       ONLINE       0     0     0
          mirror-0  ONLINE       0     0     0
            c5d0s0  ONLINE       0     0     0
            c5d1s0  ONLINE       0     0     0

errors: No known data errors
hellevik@xeon:~$ pfexec zpool remove master c8t5d0
<hangs>

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