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NetBSD 6.1.5 - man page for lvreduce (netbsd section 8)

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] 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  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 suf-
	      fix 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 sub-
	      tracted 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)

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


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