I have a somewhat similar problem.
My pool was created under FreeBSD.
pool: mass
id: 17237791880291344463
state: DEGRADED
action: The pool can be imported despite missing or damaged devices. The
fault tolerance of the pool may be compromised if imported.
config:
mass DEGRADED
raidz1 DEGRADED
ad8 ONLINE
replacing DEGRADED
ad10 ONLINE
7166408809693659020 FAULTED corrupted data
ad14 ONLINE
ad12 ONLINE
One of hdds started producing DMA errors. I tried to replace it but failed
because zpool commands just hung.
Soon the drive was back to normal and the pool worked again though the status
'replacing' remained and I couldn't remove 7166408809693659020.
Then one day I couldn't import it anymore. zpool import was getting stuck.
I tried running Solaris in the VirtualBox.
After invoking `zpool import -f mass` a lot of data is read from the disks then
a little is written and then it sits there and waits.
It looks like every zpool and zfs command hangs too.
sol-nv-b98-x86-v1, osol-0906-x86, osol-1002-123-x86 -- no difference.
Removing c9t1d0p0 symlink doesn't help so it's probably not connected to
'replacing' state.
Currently there is no evidence of any problems with the hdds, the unfortunate
one has 5 reallocated sectors.
jack at opensolaris:/dev/rdsk# zpool import
pool: mass
id: 17237791880291344463
state: DEGRADED
status: The pool was last accessed by another system.
action: The pool can be imported despite missing or damaged devices. The
fault tolerance of the pool may be compromised if imported.
see: http://www.sun.com/msg/ZFS-8000-EY
config:
mass DEGRADED
raidz1 DEGRADED
c9t0d0p0 ONLINE
replacing DEGRADED
c9t1d0p0 ONLINE
7166408809693659020 UNAVAIL cannot open
c9t3d0p0 ONLINE
c9t2d0p0 ONLINE
jack at opensolaris:~# zdb -l /dev/rdsk/c9t0d0p0
--------------------------------------------
LABEL 0
--------------------------------------------
version=13
name='mass'
state=0
txg=56673850
pool_guid=17237791880291344463
hostid=3705723203
hostname='hostname'
top_guid=17208459754718949456
guid=15572876870803484326
vdev_tree
type='raidz'
id=0
guid=17208459754718949456
nparity=1
metaslab_array=14
metaslab_shift=34
ashift=9
asize=2000412475392
is_log=0
children[0]
type='disk'
id=0
guid=15572876870803484326
path='/dev/ad8'
whole_disk=0
DTL=55
children[1]
type='replacing'
id=1
guid=16446985611132454904
whole_disk=0
children[0]
type='disk'
id=0
guid=10380122112867903132
path='/dev/ad10'
whole_disk=0
DTL=54
children[1]
type='disk'
id=1
guid=7166408809693659020
path='/dev/ad10'
whole_disk=0
not_present=1
DTL=209
children[2]
type='disk'
id=2
guid=5186164191909664446
path='/dev/ad14'
whole_disk=0
DTL=53
children[3]
type='disk'
id=3
guid=16038735897748748777
path='/dev/ad12'
whole_disk=0
DTL=52
--------------------------------------------
LABEL 1
--------------------------------------------
version=13
name='mass'
state=0
txg=56673850
pool_guid=17237791880291344463
hostid=3705723203
hostname='hostname'
top_guid=17208459754718949456
guid=15572876870803484326
vdev_tree
type='raidz'
id=0
guid=17208459754718949456
nparity=1
metaslab_array=14
metaslab_shift=34
ashift=9
asize=2000412475392
is_log=0
children[0]
type='disk'
id=0
guid=15572876870803484326
path='/dev/ad8'
whole_disk=0
DTL=55
children[1]
type='replacing'
id=1
guid=16446985611132454904
whole_disk=0
children[0]
type='disk'
id=0
guid=10380122112867903132
path='/dev/ad10'
whole_disk=0
DTL=54
children[1]
type='disk'
id=1
guid=7166408809693659020
path='/dev/ad10'
whole_disk=0
not_present=1
DTL=209
children[2]
type='disk'
id=2
guid=5186164191909664446
path='/dev/ad14'
whole_disk=0
DTL=53
children[3]
type='disk'
id=3
guid=16038735897748748777
path='/dev/ad12'
whole_disk=0
DTL=52
--------------------------------------------
LABEL 2
--------------------------------------------
version=13
name='mass'
state=0
txg=56673850
pool_guid=17237791880291344463
hostid=3705723203
hostname='hostname'
top_guid=17208459754718949456
guid=15572876870803484326
vdev_tree
type='raidz'
id=0
guid=17208459754718949456
nparity=1
metaslab_array=14
metaslab_shift=34
ashift=9
asize=2000412475392
is_log=0
children[0]
type='disk'
id=0
guid=15572876870803484326
path='/dev/ad8'
whole_disk=0
DTL=55
children[1]
type='replacing'
id=1
guid=16446985611132454904
whole_disk=0
children[0]
type='disk'
id=0
guid=10380122112867903132
path='/dev/ad10'
whole_disk=0
DTL=54
children[1]
type='disk'
id=1
guid=7166408809693659020
path='/dev/ad10'
whole_disk=0
not_present=1
DTL=209
children[2]
type='disk'
id=2
guid=5186164191909664446
path='/dev/ad14'
whole_disk=0
DTL=53
children[3]
type='disk'
id=3
guid=16038735897748748777
path='/dev/ad12'
whole_disk=0
DTL=52
--------------------------------------------
LABEL 3
--------------------------------------------
version=13
name='mass'
state=0
txg=56673850
pool_guid=17237791880291344463
hostid=3705723203
hostname='hostname'
top_guid=17208459754718949456
guid=15572876870803484326
vdev_tree
type='raidz'
id=0
guid=17208459754718949456
nparity=1
metaslab_array=14
metaslab_shift=34
ashift=9
asize=2000412475392
is_log=0
children[0]
type='disk'
id=0
guid=15572876870803484326
path='/dev/ad8'
whole_disk=0
DTL=55
children[1]
type='replacing'
id=1
guid=16446985611132454904
whole_disk=0
children[0]
type='disk'
id=0
guid=10380122112867903132
path='/dev/ad10'
whole_disk=0
DTL=54
children[1]
type='disk'
id=1
guid=7166408809693659020
path='/dev/ad10'
whole_disk=0
not_present=1
DTL=209
children[2]
type='disk'
id=2
guid=5186164191909664446
path='/dev/ad14'
whole_disk=0
DTL=53
children[3]
type='disk'
id=3
guid=16038735897748748777
path='/dev/ad12'
whole_disk=0
DTL=52
jack at opensolaris:/dev/rdsk# zpool import -f mass
jack at opensolaris:~# echo "0t959::pid2proc|::walk thread|::findstack -v" |
mdb -k
stack pointer for thread d44a8340: d38dcc24
d38dcc64 swtch+0x188()
d38dcc74 cv_wait+0x53(d8c8b9a6, d8c8b968, d38dccb4, f95c4741)
d38dccb4 txg_wait_synced+0x90(d8c8b800, 0, 0, 2)
d38dcd34 spa_load+0xe51(d4e76380, d46954d0, 2, 1)
d38dcd84 spa_import_common+0xc3()
d38dcdb4 spa_import+0x18(d4b0a000, d46954d0, 0, f95ed844)
d38dcde4 zfs_ioc_pool_import+0xcd(d4b0a000, 0, 0)
d38dce14 zfsdev_ioctl+0xe0()
d38dce44 cdev_ioctl+0x31(2d80000, 5a02, 80420c0, 100003, d8837f28, d38dcf00)
d38dce74 spec_ioctl+0x6b(d39b0e80, 5a02, 80420c0, 100003, d8837f28, d38dcf00)
d38dcec4 fop_ioctl+0x49(d39b0e80, 5a02, 80420c0, 100003, d8837f28, d38dcf00)
d38dcf84 ioctl+0x171()
d38dcfac sys_call+0x10c()
jack at opensolaris:~# echo "d4e76380::print struct spa
spa_dsl_pool->dp_tx.tx_sync_thread|::findstack -v" | mdb -k
stack pointer for thread d8e1fdc0: d8e1fbd8
d8e1fc18 swtch+0x188()
d8e1fc28 cv_wait+0x53(dc0eca68, dc0eca60, 0, 0)
d8e1fc58 zio_wait+0x55(dc0ec820, dc0ec820)
d8e1fcb8 dsl_pool_sync+0x24f(d8c8b800, 360c63b, 0)
d8e1fd28 spa_sync+0x452(d4e76380, 360c63b, 0, 0)
d8e1fda8 txg_sync_thread+0x308(d8c8b800, 0)
d8e1fdb8 thread_start+8()
jack at opensolaris:~#
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