.TH VGCHANGE 8 "LVM TOOLS" "Sistina Software UK" \" -*- nroff -*-
.SH NAME
vgchange \- change attributes of a volume group
.SH SYNOPSIS
.B vgchange
.RB [ \-A | \-\-autobackup " {" y | n }]
.RB [\-a | \-\-available " {" y | n }]
.RB [\-d | \-\-debug]
.RB [ \-h | \-\-help]
.RB [\-l | \-\-logicalvolume
.IR MaxLogicalVolumes ]
.RB [ \-v | \-\-verbose ]
.RB [ \-\-version ]
.RB [\-x | \-\-allocation " {" y | n }]
.RI [ VolumeGroupName ...]
.SH DESCRIPTION
.B vgchange
allows you to change the attributes of one or more volume groups.
Its main purpose is to activate and deactivate
.IR VolumeGroupName ,
or all volume groups if none is specified.  Only active volume groups
are subject to changes and allow access to their logical volumes.
During volume group activation, if
.B vgchange
recognizes snapshot logical volumes which were dropped because they ran
out of space, it displays a message informing the administrator that such
snapshots should be removed (see
.BR lvremove (8)).
.SH OPTIONS
See \fBlvm\fP for common options.
.TP
.BR \-A ", " \-\-autobackup { y | n }
Controls automatic backup of metadata after the change.  See
.B vgcfgbackup (8).
Default is yes.
.TP
.BR \-a ", " \-\-available { y | n }
Controls the availability of the volume group for input/output.
In other words: makes a volume group known/unknown to the kernel.
.TP
.BR \-l ", " \-\-logicalvolume " " \fIMaxLogicalVolumes\fR
Changes the maximum logical volume number of an existing inactive
volume group.
.TP
.BR \-x ", " \-\-allocation { y | n }
Enables or disables the extension/reduction of this volume group
with/by physical volumes.
.SH EXAMPLES
To activate all known volume groups in the system:
.nf

\	vgchange -a y

.fi
To change the maximum number of logical volumes of inactive volume group
.B vg00
to 128.
.nf

\	vgchange -l 128 /dev/vg00

.fi
.SH SEE ALSO
.BR lvm (8),
.BR vgcreate (8)