.TH LVREDUCE 8 "LVM TOOLS" "Sistina Software UK" \" -*- nroff -*-
.SH NAME
lvreduce \- reduce the size of a logical volume
.SH SYNOPSIS
.B lvreduce
[\-A/\-\-autobackup y/n] [\-d/\-\-debug] [\-f/\-\-force]
[\-h/\-?/\-\-help] {\-l/\-\-extents [\-]LogicalExtentsNumber |
\-L/\-\-size [\-]LogicalVolumeSize[kKmMgGtT]}
[\-v/\-\-verbose] LogicalVolumePath
.SH DESCRIPTION
lvreduce allows you to reduce the size of a logical volume.
Be careful when reducing a logical volume's size, because data in the
reduced part is lost!!! 
.br 
You should therefore ensure that the (eg) filesystem on the volume is 
resized
.i before
running lvreduce so that the extents that are to be removed are not in use.
If the filesystem is ext2 then you can use the 
.B e2fsadm(8)
command to both resize the filesystem and the logical volume together.
.br.
Shrinking snapshot logical volumes (see
.B lvcreate(8)
for information to create snapshots) is supported as well.
.SH OPTIONS
See \fBlvm\fP for common options.
.TP
.I \-A, \-\-autobackup y/n
Controls automatic backup of VG metadata after the change ( see
.B vgcfgbackup(8)
). Default is yes.
.TP
.I \-f, \-\-force
Force size reduction without any question.
.TP
.I \-l, \-\-extents [\-]LogicalExtentsNumber
Reduce or set the logical volume size in units of logical extents.
With the - sign the value will be subtracted from
the logical volume's actual size and without it the will be taken as
an absolute size.
.TP
.I \-L, \-\-size [\-]LogicalVolumeSize[kKmMgGtT]
Reduce or set the logical volume size in units of megabyte by default.
A size suffix of k for kilobyte, m for megabyte, g for gigabyte or
t for terabyte is optional.
With the - sign the value will be subtracted from
the logical volume's actual size and without it the will be taken as
an absolute size.
.SH Example
"lvreduce -l -3 /dev/vg00/lvol1" reduces the size of logical volume lvol1
in volume group vg00 by 3 logical extents.
.SH SEE ALSO
.BR lvm (8), 
.BR lvcreate (8), 
.BR lvextend (8), 
.BR lvchange (8)