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LEARN ABOUT SUSE

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]   [--noudevsync]   {-l|--extents   [-]LogicalExtentsNum-
       ber[%{VG|LV|FREE|ORIGIN}] | -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 cre-
	      ates.

       -l, --extents [-]LogicalExtentsNumber[%{VG|LV|FREE|ORIGIN}]
	      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 value 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, relative to the existing size of the Logical Volume with the suffix %LV,
	      as  a  percentage  of the remaining free space in the Volume Group with the suffix %FREE, or (for a snapshot) as a percentage of the
	      total space in the Origin Logical Volume with the suffix %ORIGIN.

       -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 vol-
	      ume'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 2.02.67(2) (2010-06-04)					       LVREDUCE(8)

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