zpool-remove —
remove devices from ZFS storage pool
zpool |
remove
[-npw
]
pool
device… |
zpool
remove
[-npw
]
pool
device…- Removes the specified device from the pool. This command supports removing
hot spare, cache, log, and both mirrored and non-redundant primary
top-level vdevs, including dedup and special vdevs.
Top-level vdevs can only be removed if the primary pool storage does not
contain a top-level raidz vdev, all top-level vdevs have the same sector
size, and the keys for all encrypted datasets are loaded.
Removing a top-level vdev reduces the total amount of space in the storage
pool. The specified device will be evacuated by copying all allocated
space from it to the other devices in the pool. In this case, the
zpool
remove command initiates the removal
and returns, while the evacuation continues in the background. The removal
progress can be monitored with zpool
status. If an I/O error is encountered
during the removal process it will be cancelled. The
device_removal feature flag must be enabled
to remove a top-level vdev, see
zpool-features(7).
A mirrored top-level device (log or data) can be removed by specifying the
top-level mirror for the same. Non-log devices or data devices that are
part of a mirrored configuration can be removed using the
zpool
detach command.
-n- Do not actually perform the removal (“No-op”). Instead,
print the estimated amount of memory that will be used by the mapping
table after the removal completes. This is nonzero only for top-level
vdevs.
-p- Used in conjunction with the
-n
flag, displays numbers as parsable (exact) values.
-w- Waits until the removal has completed before returning.
zpool
remove
-s
pool- Stops and cancels an in-progress removal of a top-level vdev.
Example 1: Removing a Mirrored
top-level (Log or Data) Device
The following commands remove the mirrored log device
mirror-2 and mirrored top-level data device
mirror-1.
Given this configuration:
pool: tank
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
sda ONLINE 0 0 0
sdb ONLINE 0 0 0
mirror-1 ONLINE 0 0 0
sdc ONLINE 0 0 0
sdd ONLINE 0 0 0
logs
mirror-2 ONLINE 0 0 0
sde ONLINE 0 0 0
sdf ONLINE 0 0 0
The command to remove the mirrored log
mirror-2
is:
#
zpool
remove tank
mirror-2
The command to remove the mirrored data
mirror-1 is:
#
zpool
remove tank
mirror-1
zpool-add(8),
zpool-detach(8),
zpool-labelclear(8),
zpool-offline(8),
zpool-replace(8),
zpool-split(8)