illumos Fault Management Architecture (FMA) Message Registry

Message: ZFS-8000-FD

title Too many I/O errors on ZFS device
description The number of I/O errors associated with a ZFS device exceeded acceptable levels.
severity major
type fault
keys fault.fs.zfs.vdev.io
details The Message ID: ZFS-8000-FD indicates a ZFS device experienced too many I/O errors to continue. Take the documented action to resolve the problem.
impact The fault tolerance of the pool may be affected.
response The device has been offlined and marked as faulted. An attempt will be made to activate a hot spare if available.
action

A device within a ZFS pool experienced too many I/O errors. Run 'zpool status -x' to determine exactly which device failed and why:

# zpool status -x
  pool: test
 state: DEGRADED
status: The number of I/O errors associated with a ZFS device exceeded
        acceptable levels.
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    103     0     0  too many errors

errors: No known data errors.

If the pool has available hot spares, then a hot spare will have been substituted. To repair the pool, replace the physical device in the system and issue a 'zpool replace' command:

# zpool replace test c0t0d1

To replace the disk with a different disk, specify the replacement disk as the second argument to 'zpool replace':

# zpool replace test c0t0d1 c0t0d2

This will begin resilvering data to the new device. Use 'zpool status' to monitor resilvering progress. When the resilvering completes, any hot spares will be removed and the pool will return to the healthy state.

If the device has been diagnosed in error, then run 'zpool clear' to clear the errors and the associated status. If the errors persist, the device may be diagnosed as faulty again. Replace the disk as described above, or contact your service provider.

po-action Run 'zpool status -x' and replace the bad device.
po-description The number of I/O errors associated with a ZFS device exceeded acceptable levels.
po-impact Fault tolerance of the pool may be compromised.
po-response The device has been offlined and marked as faulted. An attempt will be made to activate a hot spare if available.

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