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Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #13437
436 lines
12 KiB
Groff
436 lines
12 KiB
Groff
.\"
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.\" CDDL HEADER START
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.\"
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.\" The contents of this file are subject to the terms of the
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.\" Common Development and Distribution License (the "License").
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.\" You may not use this file except in compliance with the License.
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.\"
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.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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.\" or http://www.opensolaris.org/os/licensing.
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.\" See the License for the specific language governing permissions
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.\" and limitations under the License.
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.\"
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.\" When distributing Covered Code, include this CDDL HEADER in each
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.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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.\" If applicable, add the following below this CDDL HEADER, with the
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.\" fields enclosed by brackets "[]" replaced with your own identifying
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.\" information: Portions Copyright [yyyy] [name of copyright owner]
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.\"
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.\" CDDL HEADER END
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.\"
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.\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
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.\" Copyright (c) 2012, 2018 by Delphix. All rights reserved.
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.\" Copyright (c) 2012 Cyril Plisko. All Rights Reserved.
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.\" Copyright (c) 2017 Datto Inc.
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.\" Copyright (c) 2018 George Melikov. All Rights Reserved.
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.\" Copyright 2017 Nexenta Systems, Inc.
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.\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
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.\"
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.Dd March 16, 2022
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.Dt ZPOOL-IMPORT 8
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.Os
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.
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.Sh NAME
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.Nm zpool-import
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.Nd import ZFS storage pools or list available pools
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.Sh SYNOPSIS
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.Nm zpool
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.Cm import
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.Op Fl D
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.Oo Fl d Ar dir Ns | Ns Ar device Oc Ns …
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.Nm zpool
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.Cm import
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.Fl a
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.Op Fl DflmN
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.Op Fl F Op Fl nTX
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.Op Fl -rewind-to-checkpoint
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.Op Fl c Ar cachefile Ns | Ns Fl d Ar dir Ns | Ns Ar device
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.Op Fl o Ar mntopts
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.Oo Fl o Ar property Ns = Ns Ar value Oc Ns …
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.Op Fl R Ar root
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.Nm zpool
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.Cm import
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.Op Fl Dflmt
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.Op Fl F Op Fl nTX
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.Op Fl -rewind-to-checkpoint
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.Op Fl c Ar cachefile Ns | Ns Fl d Ar dir Ns | Ns Ar device
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.Op Fl o Ar mntopts
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.Oo Fl o Ar property Ns = Ns Ar value Oc Ns …
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.Op Fl R Ar root
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.Op Fl s
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.Ar pool Ns | Ns Ar id
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.Op Ar newpool
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.
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.Sh DESCRIPTION
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.Bl -tag -width Ds
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.It Xo
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.Nm zpool
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.Cm import
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.Op Fl D
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.Oo Fl d Ar dir Ns | Ns Ar device Oc Ns …
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.Xc
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Lists pools available to import.
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If the
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.Fl d
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or
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.Fl c
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options are not specified, this command searches for devices using libblkid
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on Linux and geom on
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.Fx .
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The
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.Fl d
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option can be specified multiple times, and all directories are searched.
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If the device appears to be part of an exported pool, this command displays a
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summary of the pool with the name of the pool, a numeric identifier, as well as
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the vdev layout and current health of the device for each device or file.
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Destroyed pools, pools that were previously destroyed with the
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.Nm zpool Cm destroy
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command, are not listed unless the
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.Fl D
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option is specified.
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.Pp
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The numeric identifier is unique, and can be used instead of the pool name when
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multiple exported pools of the same name are available.
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.Bl -tag -width Ds
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.It Fl c Ar cachefile
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Reads configuration from the given
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.Ar cachefile
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that was created with the
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.Sy cachefile
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pool property.
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This
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.Ar cachefile
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is used instead of searching for devices.
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.It Fl d Ar dir Ns | Ns Ar device
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Uses
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.Ar device
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or searches for devices or files in
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.Ar dir .
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The
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.Fl d
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option can be specified multiple times.
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.It Fl D
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Lists destroyed pools only.
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.El
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.It Xo
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.Nm zpool
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.Cm import
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.Fl a
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.Op Fl DflmN
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.Op Fl F Op Fl nTX
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.Op Fl c Ar cachefile Ns | Ns Fl d Ar dir Ns | Ns Ar device
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.Op Fl o Ar mntopts
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.Oo Fl o Ar property Ns = Ns Ar value Oc Ns …
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.Op Fl R Ar root
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.Op Fl s
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.Xc
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Imports all pools found in the search directories.
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Identical to the previous command, except that all pools with a sufficient
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number of devices available are imported.
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Destroyed pools, pools that were previously destroyed with the
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.Nm zpool Cm destroy
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command, will not be imported unless the
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.Fl D
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option is specified.
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.Bl -tag -width Ds
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.It Fl a
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Searches for and imports all pools found.
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.It Fl c Ar cachefile
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Reads configuration from the given
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.Ar cachefile
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that was created with the
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.Sy cachefile
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pool property.
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This
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.Ar cachefile
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is used instead of searching for devices.
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.It Fl d Ar dir Ns | Ns Ar device
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Uses
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.Ar device
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or searches for devices or files in
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.Ar dir .
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The
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.Fl d
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option can be specified multiple times.
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This option is incompatible with the
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.Fl c
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option.
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.It Fl D
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Imports destroyed pools only.
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The
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.Fl f
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option is also required.
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.It Fl f
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Forces import, even if the pool appears to be potentially active.
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.It Fl F
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Recovery mode for a non-importable pool.
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Attempt to return the pool to an importable state by discarding the last few
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transactions.
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Not all damaged pools can be recovered by using this option.
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If successful, the data from the discarded transactions is irretrievably lost.
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This option is ignored if the pool is importable or already imported.
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.It Fl l
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Indicates that this command will request encryption keys for all encrypted
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datasets it attempts to mount as it is bringing the pool online.
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Note that if any datasets have a
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.Sy keylocation
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of
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.Sy prompt
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this command will block waiting for the keys to be entered.
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Without this flag
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encrypted datasets will be left unavailable until the keys are loaded.
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.It Fl m
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Allows a pool to import when there is a missing log device.
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Recent transactions can be lost because the log device will be discarded.
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.It Fl n
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Used with the
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.Fl F
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recovery option.
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Determines whether a non-importable pool can be made importable again, but does
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not actually perform the pool recovery.
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For more details about pool recovery mode, see the
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.Fl F
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option, above.
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.It Fl N
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Import the pool without mounting any file systems.
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.It Fl o Ar mntopts
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Comma-separated list of mount options to use when mounting datasets within the
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pool.
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See
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.Xr zfs 8
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for a description of dataset properties and mount options.
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.It Fl o Ar property Ns = Ns Ar value
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Sets the specified property on the imported pool.
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See the
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.Xr zpoolprops 7
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manual page for more information on the available pool properties.
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.It Fl R Ar root
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Sets the
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.Sy cachefile
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property to
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.Sy none
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and the
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.Sy altroot
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property to
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.Ar root .
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.It Fl -rewind-to-checkpoint
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Rewinds pool to the checkpointed state.
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Once the pool is imported with this flag there is no way to undo the rewind.
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All changes and data that were written after the checkpoint are lost!
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The only exception is when the
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.Sy readonly
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mounting option is enabled.
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In this case, the checkpointed state of the pool is opened and an
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administrator can see how the pool would look like if they were
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to fully rewind.
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.It Fl s
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Scan using the default search path, the libblkid cache will not be
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consulted.
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A custom search path may be specified by setting the
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.Sy ZPOOL_IMPORT_PATH
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environment variable.
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.It Fl X
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Used with the
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.Fl F
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recovery option.
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Determines whether extreme measures to find a valid txg should take place.
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This allows the pool to
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be rolled back to a txg which is no longer guaranteed to be consistent.
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Pools imported at an inconsistent txg may contain uncorrectable checksum errors.
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For more details about pool recovery mode, see the
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.Fl F
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option, above.
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WARNING: This option can be extremely hazardous to the
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health of your pool and should only be used as a last resort.
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.It Fl T
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Specify the txg to use for rollback.
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Implies
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.Fl FX .
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For more details
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about pool recovery mode, see the
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.Fl X
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option, above.
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WARNING: This option can be extremely hazardous to the
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health of your pool and should only be used as a last resort.
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.El
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.It Xo
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.Nm zpool
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.Cm import
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.Op Fl Dflmt
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.Op Fl F Op Fl nTX
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.Op Fl c Ar cachefile Ns | Ns Fl d Ar dir Ns | Ns Ar device
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.Op Fl o Ar mntopts
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.Oo Fl o Ar property Ns = Ns Ar value Oc Ns …
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.Op Fl R Ar root
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.Op Fl s
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.Ar pool Ns | Ns Ar id
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.Op Ar newpool
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.Xc
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Imports a specific pool.
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A pool can be identified by its name or the numeric identifier.
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If
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.Ar newpool
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is specified, the pool is imported using the name
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.Ar newpool .
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Otherwise, it is imported with the same name as its exported name.
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.Pp
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If a device is removed from a system without running
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.Nm zpool Cm export
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first, the device appears as potentially active.
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It cannot be determined if this was a failed export, or whether the device is
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really in use from another host.
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To import a pool in this state, the
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.Fl f
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option is required.
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.Bl -tag -width Ds
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.It Fl c Ar cachefile
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Reads configuration from the given
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.Ar cachefile
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that was created with the
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.Sy cachefile
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pool property.
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This
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.Ar cachefile
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is used instead of searching for devices.
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.It Fl d Ar dir Ns | Ns Ar device
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Uses
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.Ar device
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or searches for devices or files in
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.Ar dir .
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The
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.Fl d
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option can be specified multiple times.
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This option is incompatible with the
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.Fl c
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option.
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.It Fl D
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Imports destroyed pool.
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The
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.Fl f
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option is also required.
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.It Fl f
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Forces import, even if the pool appears to be potentially active.
|
|
.It Fl F
|
|
Recovery mode for a non-importable pool.
|
|
Attempt to return the pool to an importable state by discarding the last few
|
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transactions.
|
|
Not all damaged pools can be recovered by using this option.
|
|
If successful, the data from the discarded transactions is irretrievably lost.
|
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This option is ignored if the pool is importable or already imported.
|
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.It Fl l
|
|
Indicates that this command will request encryption keys for all encrypted
|
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datasets it attempts to mount as it is bringing the pool online.
|
|
Note that if any datasets have a
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.Sy keylocation
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|
of
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.Sy prompt
|
|
this command will block waiting for the keys to be entered.
|
|
Without this flag
|
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encrypted datasets will be left unavailable until the keys are loaded.
|
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.It Fl m
|
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Allows a pool to import when there is a missing log device.
|
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Recent transactions can be lost because the log device will be discarded.
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.It Fl n
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|
Used with the
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.Fl F
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recovery option.
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Determines whether a non-importable pool can be made importable again, but does
|
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not actually perform the pool recovery.
|
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For more details about pool recovery mode, see the
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.Fl F
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option, above.
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.It Fl o Ar mntopts
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Comma-separated list of mount options to use when mounting datasets within the
|
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pool.
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See
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.Xr zfs 8
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for a description of dataset properties and mount options.
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.It Fl o Ar property Ns = Ns Ar value
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Sets the specified property on the imported pool.
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See the
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.Xr zpoolprops 7
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manual page for more information on the available pool properties.
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.It Fl R Ar root
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Sets the
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.Sy cachefile
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property to
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.Sy none
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and the
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.Sy altroot
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property to
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.Ar root .
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.It Fl s
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Scan using the default search path, the libblkid cache will not be
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consulted.
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A custom search path may be specified by setting the
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.Sy ZPOOL_IMPORT_PATH
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environment variable.
|
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.It Fl X
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Used with the
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.Fl F
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recovery option.
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Determines whether extreme measures to find a valid txg should take place.
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This allows the pool to
|
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be rolled back to a txg which is no longer guaranteed to be consistent.
|
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Pools imported at an inconsistent txg may contain uncorrectable
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checksum errors.
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For more details about pool recovery mode, see the
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.Fl F
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option, above.
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WARNING: This option can be extremely hazardous to the
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health of your pool and should only be used as a last resort.
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.It Fl T
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Specify the txg to use for rollback.
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Implies
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.Fl FX .
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For more details
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about pool recovery mode, see the
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.Fl X
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option, above.
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.Em WARNING :
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This option can be extremely hazardous to the
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health of your pool and should only be used as a last resort.
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.It Fl t
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Used with
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.Ar newpool .
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Specifies that
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.Ar newpool
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is temporary.
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Temporary pool names last until export.
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Ensures that the original pool name will be used
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in all label updates and therefore is retained upon export.
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Will also set
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.Fl o Sy cachefile Ns = Ns Sy none
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when not explicitly specified.
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.El
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.El
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.
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.Sh EXAMPLES
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.\" These are, respectively, examples 9 from zpool.8
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.\" Make sure to update them bidirectionally
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.Ss Example 9 : No Importing a ZFS Storage Pool
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The following command displays available pools, and then imports the pool
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.Ar tank
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for use on the system.
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The results from this command are similar to the following:
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.Bd -literal -compact -offset Ds
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.No # Nm zpool Cm import
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pool: tank
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id: 15451357997522795478
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state: ONLINE
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action: The pool can be imported using its name or numeric identifier.
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config:
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tank ONLINE
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mirror ONLINE
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sda ONLINE
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sdb ONLINE
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.No # Nm zpool Cm import Ar tank
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.Ed
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.
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.Sh SEE ALSO
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.Xr zpool-export 8 ,
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.Xr zpool-list 8 ,
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.Xr zpool-status 8
|