netbsd man page for lvreduce

LVREDUCE(8)						      System Manager's Manual						       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] 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.

       -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[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 giga-
	      bytes, t for terabytes, p for petabytes or e for exabytes is optional.  With the - sign the value will be subtracted from the  logi-
	      cal 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)

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