Eu tenho um zpool com 4 discos USB de 2 TB em uma configuração de raidz:
[root@chef /mnt/Chef]# zpool status farcryz1
pool: farcryz1
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
farcryz1 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
da1 ONLINE 0 0 0
da2 ONLINE 0 0 0
da3 ONLINE 0 0 0
da4 ONLINE 0 0 0
Para testar o pool, simulei uma falha na unidade puxando o cabo USB de uma das unidades sem colocá-lo off-line:
[root@chef /mnt/Chef]# zpool status farcryz1
pool: farcryz1
state: ONLINE
status: One or more devices has experienced an unrecoverable error. An
attempt was made to correct the error. Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
using 'zpool clear' or replace the device with 'zpool replace'.
see: http://www.sun.com/msg/ZFS-8000-9P
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
farcryz1 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
da4 ONLINE 22 4 0
da3 ONLINE 0 0 0
da1 ONLINE 0 0 0
da2 ONLINE 0 0 0
errors: No known data errors
Os dados ainda estão lá, a piscina ainda está online. Ótimo! Agora vamos tentar restaurar o pool. Liguei a unidade novamente e emiti o comando zpool replace
conforme instruído acima:
[root@chef /mnt/Chef]# zpool replace farcryz1 da4
invalid vdev specification
use '-f' to override the following errors:
/dev/da4 is part of active pool 'farcryz1'
Um .... Isso não é útil ... Então eu tentei um zpool clear farcryz1
, mas isso não ajudou em nada. Ainda não consegui substituir da4
. Então, tentei uma combinação de online
ing, offline
ing, clear
ing, replace
ing e scrub
ing. Agora estou preso aqui:
[root@chef /mnt/Chef]# zpool status -v farcryz1
pool: farcryz1
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 0h2m with 0 errors on Fri Sep 9 13:43:34 2011
config:
NAME STATE READ WRITE CKSUM
farcryz1 DEGRADED 0 0 0
raidz1 DEGRADED 0 0 0
da4 UNAVAIL 9 0 0 experienced I/O failures
da3 ONLINE 0 0 0
da1 ONLINE 0 0 0
da2 ONLINE 0 0 0
errors: No known data errors
[root@chef /mnt/Chef]# zpool replace farcryz1 da4
cannot replace da4 with da4: da4 is busy
Como posso me recuperar dessa situação, em que um dispositivo no zpool foi desconectado inesperadamente (mas não é um dispositivo com falha) e agora está de volta, pronto para ser resilvered?
EDITAR: Conforme solicitado, um tail
de dmesg
:
(ses3:umass-sim4:4:0:1): removing device entry
(da4:umass-sim4:4:0:0): removing device entry
ugen3.2: <Western Digital> at usbus3
umass4: <Western Digital My Book 1140, class 0/0, rev 3.00/10.03, addr 1> on usbus3
da4 at umass-sim4 bus 4 scbus6 target 0 lun 0
da4: <WD My Book 1140 1003> Fixed Direct Access SCSI-6 device
da4: 400.000MB/s transfers
da4: 1907697MB (3906963456 512 byte sectors: 255H 63S/T 243197C)
ses3 at umass-sim4 bus 4 scbus6 target 0 lun 1
ses3: <WD SES Device 1003> Fixed Enclosure Services SCSI-6 device
ses3: 400.000MB/s transfers
ses3: SCSI-3 SES Device
GEOM: da4: partition 1 does not start on a track boundary.
GEOM: da4: partition 1 does not end on a track boundary.
GEOM: da4: partition 1 does not start on a track boundary.
GEOM: da4: partition 1 does not end on a track boundary.
ugen3.2: <Western Digital> at usbus3 (disconnected)
umass4: at uhub3, port 1, addr 1 (disconnected)
(da4:umass-sim4:4:0:0): lost device
(da4:umass-sim4:4:0:0): removing device entry
(ses3:umass-sim4:4:0:1): lost device
(ses3:umass-sim4:4:0:1): removing device entry
ugen3.2: <Western Digital> at usbus3
umass4: <Western Digital My Book 1140, class 0/0, rev 3.00/10.03, addr 1> on usbus3
da4 at umass-sim4 bus 4 scbus6 target 0 lun 0
da4: <WD My Book 1140 1003> Fixed Direct Access SCSI-6 device
da4: 400.000MB/s transfers
da4: 1907697MB (3906963456 512 byte sectors: 255H 63S/T 243197C)
ses3 at umass-sim4 bus 4 scbus6 target 0 lun 1
ses3: <WD SES Device 1003> Fixed Enclosure Services SCSI-6 device
ses3: 400.000MB/s transfers
ses3: SCSI-3 SES Device