ZPOOL-REMOVE(8) FreeBSD System Manager's Manual ZPOOL-REMOVE(8)
NAME
zpool-remove - remove devices from ZFS storage pool
SYNOPSIS
zpool remove [-npw] pool device<?>
zpool remove -s pool
DESCRIPTION
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 or draid vdev, all top-level
vdevs have the same ashift 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 canceled. 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.
EXAMPLES
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
At this point, the log device no longer exists (both sides of the mirror
have been removed):
pool: tank
state: ONLINE
scan: 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
The command to remove the mirrored data mirror-1 is:
# zpool remove tank mirror-1
After mirror-1 has been evacuated, the pool remains redundant, but the
total amount of space is reduced:
pool: tank
state: ONLINE
scan: 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
SEE ALSO
zpool-add(8), zpool-detach(8), zpool-labelclear(8), zpool-offline(8),
zpool-replace(8), zpool-split(8)
FreeBSD 15.1-STABLE-HBSD November 19, 2024 ZPOOL-REMOVE(8)