Yup, just hit exactly the same myself. I have a feeling this faulted disk is
affecting performance, so tried to remove or offline it:
$ zpool iostat -v 30
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
rc-pool 1.27T 1015G 682 71 84.0M 1.88M
mirror 199G 265G 0 5 0 21.1K
c4t1d0 - - 0 2 0 21.1K
c4t2d0 - - 0 0 0 0
c5t1d0 - - 0 2 0 21.1K
mirror 277G 187G 170 7 21.1M 322K
c4t3d0 - - 58 4 7.31M 322K
c5t2d0 - - 54 4 6.83M 322K
c5t0d0 - - 56 4 6.99M 322K
mirror 276G 188G 171 6 21.1M 336K
c5t3d0 - - 56 4 7.03M 336K
c4t5d0 - - 56 3 7.03M 336K
c4t4d0 - - 56 3 7.04M 336K
mirror 276G 188G 169 6 20.9M 353K
c5t4d0 - - 57 3 7.17M 353K
c5t5d0 - - 54 4 6.79M 353K
c4t6d0 - - 55 3 6.99M 353K
mirror 277G 187G 171 10 20.9M 271K
c4t7d0 - - 56 4 7.11M 271K
c5t6d0 - - 55 5 6.93M 271K
c5t7d0 - - 55 5 6.88M 271K
c6d1p0 32K 504M 0 34 0 620K
---------- ----- ----- ----- ----- ----- -----
20MB in 30 seconds for 3 disks.... that's 220kb/s. Not healthy at all.
$ zpool status
pool: rc-pool
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.
see: http://www.sun.com/msg/ZFS-8000-K4
scrub: scrub completed after 2h55m with 0 errors on Tue Jun 23 11:11:42 2009
config:
NAME STATE READ WRITE CKSUM
rc-pool DEGRADED 0 0 0
mirror DEGRADED 0 0 0
c4t1d0 ONLINE 0 0 0
c4t2d0 FAULTED 1.71M 23.3M 0 too many errors
c5t1d0 ONLINE 0 0 0
mirror ONLINE 0 0 0
c4t3d0 ONLINE 0 0 0
c5t2d0 ONLINE 0 0 0
c5t0d0 ONLINE 0 0 0
mirror ONLINE 0 0 0
c5t3d0 ONLINE 0 0 0
c4t5d0 ONLINE 0 0 0
c4t4d0 ONLINE 0 0 0
mirror ONLINE 0 0 0
c5t4d0 ONLINE 0 0 0
c5t5d0 ONLINE 0 0 0
c4t6d0 ONLINE 0 0 0
mirror ONLINE 0 0 0
c4t7d0 ONLINE 0 0 0
c5t6d0 ONLINE 0 0 0
c5t7d0 ONLINE 0 0 0
logs DEGRADED 0 0 0
c6d1p0 ONLINE 0 0 0
errors: No known data errors
# zpool offline rc-pool c4t2d0
cannot offline c4t2d0: no valid replicas
# zpool remove rc-pool c4t2d0
cannot remove c4t2d0: only inactive hot spares or cache devices can be removed
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