LVREDUCE(8)                                                        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[%{VG|LV|FREE}]   |    -L|--size
       [-]LogicalVolumeSize[kKmMgGtT]}  [-t|--test] [-v|--verbose] LogicalVol-
       ume[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 for common options.

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

       -l, --extents [-]LogicalExtentsNumber[%{VG|LV|FREE}]
              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.   The number can also be expressed as a per-
              centage of the total space in the Volume Group with  the  suffix
              %VG  or relative to the existing size of the Logical Volume with
              the suffix %LV or as a percentage of the remaining free space in
              the Volume Group with the suffix %FREE.

       -L, --size [-]LogicalVolumeSize[kKmMgGtTpPeE]
              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
              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.

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),  lvconvert(8),  lvcreate(8),  lvextend(8),  lvm(8),  lvre-
       size(8), vgreduce(8)



Sistina Software UK    LVM TOOLS 2.02.44-cvs (02-17-09)            LVREDUCE(8)

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