Provided by: lvm2_2.02.02-1ubuntu1_i386 bug

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]}        [-t/--test]       [-v/--verbose]
       LogicalVolume[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.
       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 for common options.

       -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 it will be taken as an absolute size.

Example

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

SEE ALSO

       lvchange(8), lvcreate(8), lvextend(8), lvm(8), lvresize(8), vgreduce(8)