|title||Corrupted device label in a replicated configuration|
|description||A device could not be opened due to a missing or invalid device label.|
|details||The Message ID: ZFS-8000-4J indicates a device which was unable to be opened by the ZFS subsystem.|
|impact||The pool is no longer providing the configured level of replication.|
|response||A hot spare will be activated if available.|
For an active pool
If this error was encountered while running 'zpool import', please see the section below. Otherwise, run 'zpool status -x' to determine which pool has experienced a failure:
# zpool status -x pool: test 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: https://illumos.org/msg/ZFS-8000-4J scrub: none requested config: NAME STATE READ WRITE CKSUM test DEGRADED 0 0 0 mirror DEGRADED 0 0 0 c0t0d0 ONLINE 0 0 0 c0t0d1 FAULTED 0 0 0 corrupted data errors: No known data errors
If the device has been temporarily detached from the system, attach the device to the system and run 'zpool status' again. The pool should automatically detect the newly attached device and resume functioning.
If the device is no longer available, it can be replaced using 'zpool replace':
# zpool replace test c0t0d1 c0t0d2
If the device has been replaced by another disk in the same physical slot, then the device can be replaced using a single argument to the 'zpool replace' command:
# zpool replace test c0t0d1
ZFS will begin migrating data to the new device as soon as the replace is issued. Once the resilvering completes, the original device (if different from the replacement) will be removed, and the pool will be restored to the ONLINE state.
For an exported pool
If this error is encountered while running 'zpool import', the pool can be still be imported despite the failure:
# zpool import pool: test id: 5187963178597328409 state: DEGRADED status: One or more devices contains corrupted data. The fault tolerance of the pool may be compromised if imported. action: The pool can be imported using its name or numeric identifier. see: https://illumos.org/msg/ZFS-8000-4J config: test DEGRADED mirror DEGRADED c0t0d0 ONLINE c0t0d1 FAULTED corrupted data
To import the pool, run 'zpool import':
# zpool import test
Once the pool has been imported, the damaged device can be replaced according to the above procedure.
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