NAME¶
lvreduce - reduce the size of a logical volume
SYNOPSIS¶
lvreduce [
-A|
--autobackup {
y|
n}]
[
-d|
--debug] [
-h|
--help] [
-t|
--test]
[
-v|
--verbose] [
--version] [
-f|
--force]
[
--noudevsync] {
-l|
--extents
[
-]
LogicalExtentsNumber[
%{
VG|
LV|
FREE|
ORIGIN}]
| [
-L|
--size
[
-]
LogicalVolumeSize[
bBsSkKmMgGtTpPeE]}
[
-n|
--nofsck] [
-r|
--resizefs]
LogicalVolume{
Name|
Path}
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!!!
You should therefore ensure that any filesystem on the volume is resized
before running lvreduce so that the extents that are to be removed are
not in use.
Shrinking snapshot logical volumes (see
lvcreate(8) for information to
create snapshots) is supported as well. But to change the number of copies in
a mirrored logical volume use
lvconvert(8).
Sizes will be rounded if necessary - for example, the volume size must be an
exact number of extents and the size of a striped segment must be a multiple
of the number of stripes.
OPTIONS¶
See
lvm(8) for common options.
- -f, --force
- Force size reduction without prompting even when it may
cause data loss.
- --noudevsync
- Disable udev synchronisation. The process will not wait for
notification from udev. It will continue irrespective of any possible udev
processing in the background. You should only use this if udev is not
running or has rules that ignore the devices LVM2 creates.
- -l, --extents
[-]LogicalExtentsNumber[%{VG|LV|FREE|ORIGIN}]
- 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 value will be taken as an
absolute size. The number can also be expressed as a percentage of the
total space in the Volume Group with the suffix %VG, relative to
the existing size of the Logical Volume with the suffix %LV, as a
percentage of the remaining free space in the Volume Group with the suffix
%FREE, or (for a snapshot) as a percentage of the total space in
the Origin Logical Volume with the suffix %ORIGIN. The resulting
value for the substraction is rounded downward, for the absolute size it
is rounded upward.
- -L, --size
[-]LogicalVolumeSize[bBsSkKmMgGtTpPeE]
- Reduce or set the logical volume size in units of
megabytes. A size suffix of k for kilobyte, m for megabyte,
g for gigabytes, t for terabytes, p for petabytes or
e for exabytes is optional. With the - sign the value will
be subtracted from the logical volume's actual size and without it it will
be taken as an absolute size.
- -n, --nofsck
- Do not perform fsck before resizing filesystem when
filesystem requires it. You may need to use --force to proceed with
this option.
- -r, --resizefs
- Resize underlying filesystem together with the logical
volume using fsadm(8).
EXAMPLES¶
Reduce the size of logical volume lvol1 in volume group vg00 by 3 logical
extents:
lvreduce -l -3 vg00/lvol1
SEE ALSO¶
fsadm(8),
lvchange(8),
lvconvert(8),
lvcreate(8),
lvextend(8),
lvm(8),
lvresize(8),
vgreduce(8)