.TH VGREDUCE 8 "LVM TOOLS #VERSION#" "Red Hat, Inc."
.SH NAME
vgreduce - Remove physical volume(s) from a volume group
.
.SH SYNOPSIS
\fBvgreduce\fP \fIoption_args\fP \fIposition_args\fP
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    [ \fIoption_args\fP ]
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.P
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 \fB-a\fP|\fB--all\fP
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 \fB-A\fP|\fB--autobackup\fP \fBy\fP|\fBn\fP
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    \fB--commandprofile\fP \fIString\fP
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    \fB--config\fP \fIString\fP
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 \fB-d\fP|\fB--debug\fP
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    \fB--devices\fP \fIPV\fP
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    \fB--devicesfile\fP \fIString\fP
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    \fB--driverloaded\fP \fBy\fP|\fBn\fP
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 \fB-f\fP|\fB--force\fP
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 \fB-h\fP|\fB--help\fP
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    \fB--lockopt\fP \fIString\fP
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    \fB--longhelp\fP
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    \fB--mirrorsonly\fP
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    \fB--nolocking\fP
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    \fB--profile\fP \fIString\fP
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 \fB-q\fP|\fB--quiet\fP
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    \fB--removemissing\fP
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    \fB--reportformat\fP \fBbasic\fP|\fBjson\fP
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 \fB-t\fP|\fB--test\fP
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 \fB-v\fP|\fB--verbose\fP
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    \fB--version\fP
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 \fB-y\fP|\fB--yes\fP
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.SH DESCRIPTION
vgreduce removes one or more unused PVs from a VG.
.SH USAGE
Remove a PV from a VG.
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.P
\fBvgreduce\fP \fIVG\fP \fIPV\fP ...
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.RS 4
[ COMMON_OPTIONS ]
.RE
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-

Remove all unused PVs from a VG.
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.P
\fBvgreduce\fP \fB-a\fP|\fB--all\fP \fIVG\fP
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.RS 4
[ COMMON_OPTIONS ]
.RE
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-

Remove all missing PVs from a VG.
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.P
\fBvgreduce\fP \fB--removemissing\fP \fIVG\fP
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.RS 4
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[    \fB--mirrorsonly\fP ]
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[ COMMON_OPTIONS ]
.RE
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-

Common options for command:
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.RS 4
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[ \fB-A\fP|\fB--autobackup\fP \fBy\fP|\fBn\fP ]
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[ \fB-f\fP|\fB--force\fP ]
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[    \fB--reportformat\fP \fBbasic\fP|\fBjson\fP ]
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.RE

Common options for lvm:
.
.RS 4
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[ \fB-d\fP|\fB--debug\fP ]
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[ \fB-h\fP|\fB--help\fP ]
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[ \fB-q\fP|\fB--quiet\fP ]
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[ \fB-t\fP|\fB--test\fP ]
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[ \fB-v\fP|\fB--verbose\fP ]
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[ \fB-y\fP|\fB--yes\fP ]
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[    \fB--commandprofile\fP \fIString\fP ]
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[    \fB--config\fP \fIString\fP ]
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[    \fB--devices\fP \fIPV\fP ]
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[    \fB--devicesfile\fP \fIString\fP ]
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[    \fB--driverloaded\fP \fBy\fP|\fBn\fP ]
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[    \fB--lockopt\fP \fIString\fP ]
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[    \fB--longhelp\fP ]
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[    \fB--nolocking\fP ]
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[    \fB--profile\fP \fIString\fP ]
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[    \fB--version\fP ]
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.RE
.SH OPTIONS
.HP
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\fB-a\fP|\fB--all\fP
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Removes all empty PVs if none are named on the command line.
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\fB-A\fP|\fB--autobackup\fP \fBy\fP|\fBn\fP
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Specifies if metadata should be backed up automatically after a change.
Enabling this is strongly advised! See \fBvgcfgbackup\fP(8) for more information.
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\fB--commandprofile\fP \fIString\fP
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The command profile to use for command configuration.
See \fBlvm.conf\fP(5) for more information about profiles.
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\fB--config\fP \fIString\fP
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Config settings for the command. These override lvm.conf settings.
The String arg uses the same format as lvm.conf,
or may use section/field syntax.
See \fBlvm.conf\fP(5) for more information about config.
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\fB-d\fP|\fB--debug\fP ...
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Set debug level. Repeat from 1 to 6 times to increase the detail of
messages sent to the log file and/or syslog (if configured).
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\fB--devices\fP \fIPV\fP
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Devices that the command can use. This option can be repeated
or accepts a comma separated list of devices. This overrides
the devices file.
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\fB--devicesfile\fP \fIString\fP
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A file listing devices that LVM should use.
The file must exist in /etc/lvm/devices/ and is managed
with the lvmdevices(8) command.
This overrides the lvm.conf devices/devicesfile and
devices/use_devicesfile settings.
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\fB--driverloaded\fP \fBy\fP|\fBn\fP
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If set to no, the command will not attempt to use device-mapper.
For testing and debugging.
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\fB-f\fP|\fB--force\fP ...
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Override various checks, confirmations and protections.
Use with extreme caution.
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\fB-h\fP|\fB--help\fP
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Display help text.
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\fB--lockopt\fP \fIString\fP
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Used to pass options for special cases to lvmlockd.
See \fBlvmlockd\fP(8) for more information.
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\fB--longhelp\fP
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Display long help text.
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\fB--mirrorsonly\fP
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Only remove missing PVs from mirror LVs.
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\fB--nolocking\fP
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Disable locking.
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\fB--profile\fP \fIString\fP
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An alias for --commandprofile or --metadataprofile, depending
on the command.
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\fB-q\fP|\fB--quiet\fP ...
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Suppress output and log messages. Overrides --debug and --verbose.
Repeat once to also suppress any prompts with answer 'no'.
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\fB--removemissing\fP
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Removes all missing PVs from the VG, if there are no LVs allocated
on them. This resumes normal operation of the VG (new LVs may again
be created, changed and so on).
If this is not possible because LVs are referencing the missing PVs,
this option can be combined with --force to have the command remove
any partial LVs. In this case, any LVs and dependent snapshots that
were partly on the missing disks are removed completely, including
those parts on disks that are still present.
If LVs spanned several disks, including ones that are lost, salvaging
some data first may be possible by activating LVs in partial mode.
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\fB--reportformat\fP \fBbasic\fP|\fBjson\fP
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Overrides current output format for reports which is defined globally by
the report/output_format setting in lvm.conf.
\fBbasic\fP is the original format with columns and rows.
If there is more than one report per command, each report is prefixed
with the report name for identification. \fBjson\fP produces report
output in JSON format. See \fBlvmreport\fP(7) for more information.
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\fB-t\fP|\fB--test\fP
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Run in test mode. Commands will not update metadata.
This is implemented by disabling all metadata writing but nevertheless
returning success to the calling function. This may lead to unusual
error messages in multi-stage operations if a tool relies on reading
back metadata it believes has changed but hasn't.
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\fB-v\fP|\fB--verbose\fP ...
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Set verbose level. Repeat from 1 to 4 times to increase the detail
of messages sent to stdout and stderr.
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\fB--version\fP
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Display version information.
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\fB-y\fP|\fB--yes\fP
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Do not prompt for confirmation interactively but always assume the
answer yes. Use with extreme caution.
(For automatic no, see -qq.)
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.SH VARIABLES
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\fIVG\fP
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Volume Group name.  See \fBlvm\fP(8) for valid names.
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\fIPV\fP
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Physical Volume name, a device path under /dev.
For commands managing physical extents, a PV positional arg
generally accepts a suffix indicating a range (or multiple ranges)
of physical extents (PEs). When the first PE is omitted, it defaults
to the start of the device, and when the last PE is omitted it defaults to end.
Start and end range (inclusive): \fIPV\fP[\fB:\fP\fIPE\fP\fB-\fP\fIPE\fP]...
Start and length range (counting from 0): \fIPV\fP[\fB:\fP\fIPE\fP\fB+\fP\fIPE\fP]...
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\fIString\fP
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See the option description for information about the string content.
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\fISize\fP[UNIT]
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Size is an input number that accepts an optional unit.
Input units are always treated as base two values, regardless of
capitalization, e.g. 'k' and 'K' both refer to 1024.
The default input unit is specified by letter, followed by |UNIT.
UNIT represents other possible input units: \fBbBsSkKmMgGtTpPeE\fP.
b|B is bytes, s|S is sectors of 512 bytes, k|K is KiB,
m|M is MiB, g|G is GiB, t|T is TiB, p|P is PiB, e|E is EiB.
(This should not be confused with the output control --units, where
capital letters mean multiple of 1000.)
.SH ENVIRONMENT VARIABLES
See \fBlvm\fP(8) for information about environment variables used by lvm.
For example, LVM_VG_NAME can generally be substituted for a required VG parameter.
.SH SEE ALSO

.BR lvm (8)
.BR lvm.conf (5)
.BR lvmconfig (8)
.BR lvmdevices (8)

.BR pvchange (8)
.BR pvck (8)
.BR pvcreate (8)
.BR pvdisplay (8)
.BR pvmove (8)
.BR pvremove (8)
.BR pvresize (8)
.BR pvs (8)
.BR pvscan (8) 

.BR vgcfgbackup (8)
.BR vgcfgrestore (8)
.BR vgchange (8)
.BR vgck (8)
.BR vgcreate (8)
.BR vgconvert (8)
.BR vgdisplay (8)
.BR vgexport (8)
.BR vgextend (8)
.BR vgimport (8)
.BR vgimportclone (8)
.BR vgimportdevices (8)
.BR vgmerge (8)
.BR vgmknodes (8)
.BR vgreduce (8)
.BR vgremove (8)
.BR vgrename (8)
.BR vgs (8)
.BR vgscan (8)
.BR vgsplit (8) 

.BR lvcreate (8)
.BR lvchange (8)
.BR lvconvert (8)
.BR lvdisplay (8)
.BR lvextend (8)
.BR lvreduce (8)
.BR lvremove (8)
.BR lvrename (8)
.BR lvresize (8)
.BR lvs (8)
.BR lvscan (8)

.BR lvm-fullreport (8)
.BR lvm-lvpoll (8)
.BR lvm2-activation-generator (8)
.BR blkdeactivate (8)
.BR lvmdump (8)

.BR dmeventd (8)
.BR lvmpolld (8)
.BR lvmlockd (8)
.BR lvmlockctl (8)
.BR cmirrord (8)
.BR lvmdbusd (8)

.BR lvmsystemid (7)
.BR lvmreport (7)
.BR lvmraid (7)
.BR lvmthin (7)
.BR lvmcache (7)