125 lines
3.8 KiB
Groff
125 lines
3.8 KiB
Groff
.\" 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-ADD 8
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.Os
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.
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.Sh NAME
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.Nm zpool-add
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.Nd add vdevs to ZFS storage pool
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.Sh SYNOPSIS
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.Nm zpool
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.Cm add
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.Op Fl fgLnP
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.Oo Fl o Ar property Ns = Ns Ar value Oc
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.Ar pool vdev Ns …
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.
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.Sh DESCRIPTION
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Adds the specified virtual devices to the given pool.
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The
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.Ar vdev
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specification is described in the
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.Em Virtual Devices
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section of
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.Xr zpoolconcepts 7 .
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The behavior of the
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.Fl f
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option, and the device checks performed are described in the
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.Nm zpool Cm create
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subcommand.
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.Bl -tag -width Ds
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.It Fl f
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Forces use of
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.Ar vdev Ns s ,
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even if they appear in use or specify a conflicting replication level.
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Not all devices can be overridden in this manner.
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.It Fl g
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Display
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.Ar vdev ,
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GUIDs instead of the normal device names.
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These GUIDs can be used in place of
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device names for the zpool detach/offline/remove/replace commands.
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.It Fl L
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Display real paths for
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.Ar vdev Ns s
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resolving all symbolic links.
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This can be used to look up the current block
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device name regardless of the
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.Pa /dev/disk
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path used to open it.
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.It Fl n
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Displays the configuration that would be used without actually adding the
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.Ar vdev Ns s .
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The actual pool creation can still fail due to insufficient privileges or
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device sharing.
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.It Fl P
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Display real paths for
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.Ar vdev Ns s
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instead of only the last component of the path.
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This can be used in conjunction with the
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.Fl L
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flag.
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.It Fl o Ar property Ns = Ns Ar value
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Sets the given pool properties.
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See the
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.Xr zpoolprops 7
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manual page for a list of valid properties that can be set.
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The only property supported at the moment is
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.Sy ashift .
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.El
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.
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.Sh EXAMPLES
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.\" These are, respectively, examples 5, 13 from zpool.8
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.\" Make sure to update them bidirectionally
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.Ss Example 1 : No Adding a Mirror to a ZFS Storage Pool
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The following command adds two mirrored disks to the pool
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.Ar tank ,
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assuming the pool is already made up of two-way mirrors.
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The additional space is immediately available to any datasets within the pool.
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.Dl # Nm zpool Cm add Ar tank Sy mirror Pa sda sdb
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.
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.Ss Example 2 : No Adding Cache Devices to a ZFS Pool
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The following command adds two disks for use as cache devices to a ZFS storage
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pool:
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.Dl # Nm zpool Cm add Ar pool Sy cache Pa sdc sdd
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.Pp
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Once added, the cache devices gradually fill with content from main memory.
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Depending on the size of your cache devices, it could take over an hour for
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them to fill.
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Capacity and reads can be monitored using the
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.Cm iostat
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subcommand as follows:
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.Dl # Nm zpool Cm iostat Fl v Ar pool 5
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.
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.Sh SEE ALSO
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.Xr zpool-attach 8 ,
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.Xr zpool-import 8 ,
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.Xr zpool-initialize 8 ,
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.Xr zpool-online 8 ,
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.Xr zpool-remove 8
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