LVREDUCE(8)

NAME
lvreduce - reduce the size of a logical volume

SYNOPSIS
lvreduce [-A/--autobackup y/n] [-d/--debug] [-f/--force] [-h/-?/--help] {-l/--extents [-]LogicalExtentsNumber | -L/--size [-]LogicalVolumeSize[kKmMgGtT]} [-v/--verbose] LogicalVolumePath

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 the (eg) filesystem on the volume is resized 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 e2fsadm(8) command to both resize the filesystem and the logical volume together. Shrinking snapshot logical volumes (see lvcreate(8) for information to create snapshots) is supported as well.

OPTIONS
See lvm for common options.

-A, --autobackup y/n
    Controls automatic backup of VG metadata after the change ( see vgcfgbackup(8) ). Default is yes.

-f, --force
    Force size reduction without any question.

-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.

-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.

Example
"lvreduce -l -3 /dev/vg00/lvol1" reduces the size of logical volume lvol1 in volume group vg00 by 3 logical extents.

SEE ALSO
lvm(8), lvcreate(8), lvextend(8), lvchange(8)