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21.\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
22.\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
23.\" Copyright (c) 2011, 2019 by Delphix. All rights reserved.
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32.Dd June 30, 2019
33.Dt ZFS-UPGRADE 8
34.Os
35.
36.Sh NAME
37.Nm zfs-upgrade
38.Nd manage on-disk version of ZFS filesystems
39.Sh SYNOPSIS
40.Nm zfs
41.Cm upgrade
42.Nm zfs
43.Cm upgrade
44.Fl v
45.Nm zfs
46.Cm upgrade
47.Op Fl r
48.Op Fl V Ar version
49.Fl a Ns | Ns Ar filesystem
50.
51.Sh DESCRIPTION
52.Bl -tag -width ""
53.It Xo
54.Nm zfs
55.Cm upgrade
56.Xc
57Displays a list of file systems that are not the most recent version.
58.It Xo
59.Nm zfs
60.Cm upgrade
61.Fl v
62.Xc
63Displays a list of currently supported file system versions.
64.It Xo
65.Nm zfs
66.Cm upgrade
67.Op Fl r
68.Op Fl V Ar version
69.Fl a Ns | Ns Ar filesystem
70.Xc
71Upgrades file systems to a new on-disk version.
72Once this is done, the file systems will no longer be accessible on systems
73running older versions of ZFS.
74.Nm zfs Cm send
75streams generated from new snapshots of these file systems cannot be accessed on
76systems running older versions of ZFS.
77.Pp
78In general, the file system version is independent of the pool version.
79See
80.Xr zpool-features 7
81for information on features of ZFS storage pools.
82.Pp
83In some cases, the file system version and the pool version are interrelated and
84the pool version must be upgraded before the file system version can be
85upgraded.
86.Bl -tag -width "filesystem"
87.It Fl V Ar version
88Upgrade to
89.Ar version .
90If not specified, upgrade to the most recent version.
91This
92option can only be used to increase the version number, and only up to the most
93recent version supported by this version of ZFS.
94.It Fl a
95Upgrade all file systems on all imported pools.
96.It Ar filesystem
97Upgrade the specified file system.
98.It Fl r
99Upgrade the specified file system and all descendent file systems.
100.El
101.El
102.Sh SEE ALSO
103.Xr zpool-upgrade 8
104