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NAME

       lvreduce - reduce the size of a logical volume

SYNOPSIS

       lvreduce [-A|--autobackup y|n] [-d|--debug] [-f|--force] [-h|-?|--help]
       [--noudevsync] {-l|--extents  [-]LogicalExtentsNumber[%{VG|LV|FREE}]  |
       -L|--size      [-]LogicalVolumeSize[bBsSkKmMgGtTpPeE]}      [-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.  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.

       --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}]
              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
              percentage 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[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.

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),
       lvresize(8), vgreduce(8)