1.\" 2.\" CDDL HEADER START 3.\" 4.\" The contents of this file are subject to the terms of the 5.\" Common Development and Distribution License (the "License"). 6.\" You may not use this file except in compliance with the License. 7.\" 8.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9.\" or http://www.opensolaris.org/os/licensing. 10.\" See the License for the specific language governing permissions 11.\" and limitations under the License. 12.\" 13.\" When distributing Covered Code, include this CDDL HEADER in each 14.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15.\" If applicable, add the following below this CDDL HEADER, with the 16.\" fields enclosed by brackets "[]" replaced with your own identifying 17.\" information: Portions Copyright [yyyy] [name of copyright owner] 18.\" 19.\" CDDL HEADER END 20.\" 21.\" 22.\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved. 23.\" Copyright (c) 2012, 2018 by Delphix. All rights reserved. 24.\" Copyright (c) 2012 Cyril Plisko. All Rights Reserved. 25.\" Copyright (c) 2017 Datto Inc. 26.\" Copyright (c) 2018 George Melikov. All Rights Reserved. 27.\" Copyright 2017 Nexenta Systems, Inc. 28.\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved. 29.\" 30.Dd May 15, 2020 31.Dt ZPOOL-ATTACH 8 32.Os 33.Sh NAME 34.Nm zpool Ns Pf - Cm attach 35.Nd Attach a new device to an existing ZFS virtual device (vdev). 36.Sh SYNOPSIS 37.Nm 38.Cm attach 39.Op Fl fsw 40.Oo Fl o Ar property Ns = Ns Ar value Oc 41.Ar pool device new_device 42.Sh DESCRIPTION 43.Bl -tag -width Ds 44.It Xo 45.Nm 46.Cm attach 47.Op Fl fsw 48.Oo Fl o Ar property Ns = Ns Ar value Oc 49.Ar pool device new_device 50.Xc 51Attaches 52.Ar new_device 53to the existing 54.Ar device . 55The existing device cannot be part of a raidz configuration. 56If 57.Ar device 58is not currently part of a mirrored configuration, 59.Ar device 60automatically transforms into a two-way mirror of 61.Ar device 62and 63.Ar new_device . 64If 65.Ar device 66is part of a two-way mirror, attaching 67.Ar new_device 68creates a three-way mirror, and so on. 69In either case, 70.Ar new_device 71begins to resilver immediately and any running scrub is cancelled. 72.Bl -tag -width Ds 73.It Fl f 74Forces use of 75.Ar new_device , 76even if it appears to be in use. 77Not all devices can be overridden in this manner. 78.It Fl o Ar property Ns = Ns Ar value 79Sets the given pool properties. See the 80.Xr zpoolprops 8 81manual page for a list of valid properties that can be set. The only property 82supported at the moment is ashift. 83.It Fl s 84The 85.Ar new_device 86is reconstructed sequentially to restore redundancy as quickly as possible. 87Checksums are not verfied during sequential reconstruction so a scrub is 88started when the resilver completes. 89Sequential reconstruction is not supported for raidz configurations. 90.It Fl w 91Waits until 92.Ar new_device 93has finished resilvering before returning. 94.El 95.El 96.Sh SEE ALSO 97.Xr zpool-detach 8 , 98.Xr zpool-add 8 , 99.Xr zpool-import 8 , 100.Xr zpool-initialize 8 , 101.Xr zpool-online 8 , 102.Xr zpool-replace 8 , 103.Xr zpool-resilver 8 104