Provided by: zfsutils-linux_2.2.6-1ubuntu2_amd64 
NAME
zpool-import — import ZFS storage pools or list available pools
SYNOPSIS
zpool import [-D] [-d dir|device]…
zpool import -a [-DflmN] [-F [-nTX]] [--rewind-to-checkpoint] [-c cachefile|-d dir|device]
[-o mntopts] [-o property=value]… [-R root]
zpool import [-Dflmt] [-F [-nTX]] [--rewind-to-checkpoint] [-c cachefile|-d dir|device]
[-o mntopts] [-o property=value]… [-R root] [-s] pool|id [newpool]
DESCRIPTION
zpool import [-D] [-d dir|device]…
Lists pools available to import. If the -d or -c options are not specified, this
command searches for devices using libblkid on Linux and geom on FreeBSD. The -d
option can be specified multiple times, and all directories are searched. If the
device appears to be part of an exported pool, this command displays a summary of
the pool with the name of the pool, a numeric identifier, as well as the vdev layout
and current health of the device for each device or file. Destroyed pools, pools
that were previously destroyed with the zpool destroy command, are not listed unless
the -D option is specified.
The numeric identifier is unique, and can be used instead of the pool name when
multiple exported pools of the same name are available.
-c cachefile
Reads configuration from the given cachefile that was created with the
cachefile pool property. This cachefile is used instead of searching for
devices.
-d dir|device
Uses device or searches for devices or files in dir. The -d option can be
specified multiple times.
-D Lists destroyed pools only.
zpool import -a [-DflmN] [-F [-nTX]] [-c cachefile|-d dir|device] [-o mntopts] [-o
property=value]… [-R root] [-s]
Imports all pools found in the search directories. Identical to the previous
command, except that all pools with a sufficient number of devices available are
imported. Destroyed pools, pools that were previously destroyed with the zpool
destroy command, will not be imported unless the -D option is specified.
-a Searches for and imports all pools found.
-c cachefile
Reads configuration from the given cachefile that was created with the
cachefile pool property. This cachefile is used instead of searching for
devices.
-d dir|device
Uses device or searches for devices or files in dir. The -d option can be
specified multiple times. This option is incompatible with the -c option.
-D Imports destroyed pools only. The -f option is also required.
-f Forces import, even if the pool appears to be potentially active.
-F Recovery mode for a non-importable pool. Attempt to return the pool to an
importable state by discarding the last few transactions. Not all damaged
pools can be recovered by using this option. If successful, the data from
the discarded transactions is irretrievably lost. This option is ignored if
the pool is importable or already imported.
-l Indicates that this command will request encryption keys for all encrypted
datasets it attempts to mount as it is bringing the pool online. Note that
if any datasets have a keylocation of prompt this command will block waiting
for the keys to be entered. Without this flag encrypted datasets will be
left unavailable until the keys are loaded.
-m Allows a pool to import when there is a missing log device. Recent
transactions can be lost because the log device will be discarded.
-n Used with the -F recovery option. Determines whether a non-importable pool
can be made importable again, but does not actually perform the pool
recovery. For more details about pool recovery mode, see the -F option,
above.
-N Import the pool without mounting any file systems.
-o mntopts
Comma-separated list of mount options to use when mounting datasets within
the pool. See zfs(8) for a description of dataset properties and mount
options.
-o property=value
Sets the specified property on the imported pool. See the zpoolprops(7)
manual page for more information on the available pool properties.
-R root
Sets the cachefile property to none and the altroot property to root.
--rewind-to-checkpoint
Rewinds pool to the checkpointed state. Once the pool is imported with this
flag there is no way to undo the rewind. All changes and data that were
written after the checkpoint are lost! The only exception is when the
readonly mounting option is enabled. In this case, the checkpointed state
of the pool is opened and an administrator can see how the pool would look
like if they were to fully rewind.
-s Scan using the default search path, the libblkid cache will not be
consulted. A custom search path may be specified by setting the
ZPOOL_IMPORT_PATH environment variable.
-X Used with the -F recovery option. Determines whether extreme measures to
find a valid txg should take place. This allows the pool to be rolled back
to a txg which is no longer guaranteed to be consistent. Pools imported at
an inconsistent txg may contain uncorrectable checksum errors. For more
details about pool recovery mode, see the -F option, above. WARNING: This
option can be extremely hazardous to the health of your pool and should only
be used as a last resort.
-T Specify the txg to use for rollback. Implies -FX. For more details about
pool recovery mode, see the -X option, above. WARNING: This option can be
extremely hazardous to the health of your pool and should only be used as a
last resort.
zpool import [-Dflmt] [-F [-nTX]] [-c cachefile|-d dir|device] [-o mntopts] [-o
property=value]… [-R root] [-s] pool|id [newpool]
Imports a specific pool. A pool can be identified by its name or the numeric
identifier. If newpool is specified, the pool is imported using the name newpool.
Otherwise, it is imported with the same name as its exported name.
If a device is removed from a system without running zpool export first, the device
appears as potentially active. It cannot be determined if this was a failed export,
or whether the device is really in use from another host. To import a pool in this
state, the -f option is required.
-c cachefile
Reads configuration from the given cachefile that was created with the
cachefile pool property. This cachefile is used instead of searching for
devices.
-d dir|device
Uses device or searches for devices or files in dir. The -d option can be
specified multiple times. This option is incompatible with the -c option.
-D Imports destroyed pool. The -f option is also required.
-f Forces import, even if the pool appears to be potentially active.
-F Recovery mode for a non-importable pool. Attempt to return the pool to an
importable state by discarding the last few transactions. Not all damaged
pools can be recovered by using this option. If successful, the data from
the discarded transactions is irretrievably lost. This option is ignored if
the pool is importable or already imported.
-l Indicates that this command will request encryption keys for all encrypted
datasets it attempts to mount as it is bringing the pool online. Note that
if any datasets have a keylocation of prompt this command will block waiting
for the keys to be entered. Without this flag encrypted datasets will be
left unavailable until the keys are loaded.
-m Allows a pool to import when there is a missing log device. Recent
transactions can be lost because the log device will be discarded.
-n Used with the -F recovery option. Determines whether a non-importable pool
can be made importable again, but does not actually perform the pool
recovery. For more details about pool recovery mode, see the -F option,
above.
-o mntopts
Comma-separated list of mount options to use when mounting datasets within
the pool. See zfs(8) for a description of dataset properties and mount
options.
-o property=value
Sets the specified property on the imported pool. See the zpoolprops(7)
manual page for more information on the available pool properties.
-R root
Sets the cachefile property to none and the altroot property to root.
-s Scan using the default search path, the libblkid cache will not be
consulted. A custom search path may be specified by setting the
ZPOOL_IMPORT_PATH environment variable.
-X Used with the -F recovery option. Determines whether extreme measures to
find a valid txg should take place. This allows the pool to be rolled back
to a txg which is no longer guaranteed to be consistent. Pools imported at
an inconsistent txg may contain uncorrectable checksum errors. For more
details about pool recovery mode, see the -F option, above. WARNING: This
option can be extremely hazardous to the health of your pool and should only
be used as a last resort.
-T Specify the txg to use for rollback. Implies -FX. For more details about
pool recovery mode, see the -X option, above. WARNING: This option can be
extremely hazardous to the health of your pool and should only be used as a
last resort.
-t Used with newpool. Specifies that newpool is temporary. Temporary pool
names last until export. Ensures that the original pool name will be used
in all label updates and therefore is retained upon export. Will also set
-o cachefile=none when not explicitly specified.
EXAMPLES
Example 9: Importing a ZFS Storage Pool
The following command displays available pools, and then imports the pool tank for use on
the system. The results from this command are similar to the following:
# zpool import
pool: tank
id: 15451357997522795478
state: ONLINE
action: The pool can be imported using its name or numeric identifier.
config:
tank ONLINE
mirror ONLINE
sda ONLINE
sdb ONLINE
# zpool import tank
SEE ALSO
zpool-export(8), zpool-list(8), zpool-status(8)