Hi Brian,
What are you trying to determine? How the pool behaves when a drive is
yanked out?
Its hard to tell how a pool will react with external USB drives. I think
it will also depend on how the system handles a device removal.
I created a similar raidz pool with non-USB devices, offlined a disk,
and ran a scrub. It works as expected. See the output below. Could
you retry your test with an offline rather than a yank and see if
the system hangs?
In addition, we don't support pools that are created on p* devices.
Use the c1t0d* names instead.
Thanks,
Cindy
# zpool create rzpool raidz1 c2t6d0 c2t7d0 c2t8d0
# zpool offline rzpool c2t8d0
# zpool status rzpool
pool: rzpool
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: none requested
config:
NAME STATE READ WRITE CKSUM
rzpool DEGRADED 0 0 0
raidz1-0 DEGRADED 0 0 0
c2t6d0 ONLINE 0 0 0
c2t7d0 ONLINE 0 0 0
c2t8d0 OFFLINE 0 0 0
errors: No known data errors
# zpool scrub rzpool
# zpool status rzpool
pool: rzpool
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: scrub repaired 0 in 0h0m with 0 errors on Mon Jul 12 09:56:36 2010
config:
NAME STATE READ WRITE CKSUM
rzpool DEGRADED 0 0 0
raidz1-0 DEGRADED 0 0 0
c2t6d0 ONLINE 0 0 0
c2t7d0 ONLINE 0 0 0
c2t8d0 OFFLINE 0 0 0
errors: No known data errors
# zpool status rzpool
pool: rzpool
state: ONLINE
scan: resilvered 14K in 0h0m with 0 errors on Mon Jul 12 10:12:55 2010
config:
NAME STATE READ WRITE CKSUM
rzpool ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
c2t6d0 ONLINE 0 0 0
c2t7d0 ONLINE 0 0 0
c2t8d0 ONLINE 0 0 0
errors: No known data errors
On 07/12/10 10:45, Brian Leonard wrote:
Hi,
I'm currently trying to work with a quad-bay USB drive enclosure. I've created
a raidz pool as follows:
bleon...@opensolaris:~# zpool status r5pool
pool: r5pool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
r5pool ONLINE 0 0 0
raidz1 ONLINE 0 0 0
c1t0d0p0 ONLINE 0 0 0
c1t0d1p0 ONLINE 0 0 0
c1t0d2p0 ONLINE 0 0 0
c1t0d3p0 ONLINE 0 0 0
errors: No known data errors
If I pop a disk and run a zpool scrub, the fault is noted:
bleon...@opensolaris:~# zpool scrub r5pool
bleon...@opensolaris:~# zpool status r5pool
pool: r5pool
state: DEGRADED
status: One or more devices could not be used because the label is missing or
invalid. Sufficient replicas exist for the pool to continue
functioning in a degraded state.
action: Replace the device using 'zpool replace'.
see: http://www.sun.com/msg/ZFS-8000-4J
scrub: scrub completed after 0h0m with 0 errors on Mon Jul 12 12:35:46 2010
config:
NAME STATE READ WRITE CKSUM
r5pool DEGRADED 0 0 0
raidz1 DEGRADED 0 0 0
c1t0d0p0 ONLINE 0 0 0
c1t0d1p0 ONLINE 0 0 0
c1t0d2p0 FAULTED 0 0 0 corrupted data
c1t0d3p0 ONLINE 0 0 0
errors: No known data errors
However, it's when I pop the disk back in that everything goes south. If I run
a zpool scrub at this point, the command appears to just hang.
Running zpool status again shows the scrub will finish in 2 minutes, but I
never does. You can see it's been running for 33 minutes already, and there's
no data in the pool.
bleon...@opensolaris:/r5pool# zpool status r5pool
pool: r5pool
state: ONLINE
status: One or more devices are faulted in response to IO failures.
action: Make sure the affected devices are connected, then run 'zpool clear'.
see: http://www.sun.com/msg/ZFS-8000-HC
scrub: scrub in progress for 0h33m, 92.41% done, 0h2m to go
config:
NAME STATE READ WRITE CKSUM
r5pool ONLINE 0 0 0
raidz1 ONLINE 0 0 0
c1t0d0p0 ONLINE 0 0 0
c1t0d1p0 ONLINE 0 0 0
c1t0d2p0 ONLINE 0 0 0
c1t0d3p0 ONLINE 0 0 0
errors: 24 data errors, use '-v' for a list
zpool scrub -s r5pool doesn't have any effect.
I can't even kill the scrub process. Even a reboot command at this point will
hang the machine, so I have to hard power-cycle the machine to get everything
back to normal. There must be a more elegant solution, right?
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