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58 lines
2.0 KiB
Groff
58 lines
2.0 KiB
Groff
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.TH LVREDUCE 8 "LVM TOOLS" "Sistina Software UK" \" -*- nroff -*-
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.SH NAME
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lvreduce \- reduce the size of a logical volume
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.SH SYNOPSIS
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.B lvreduce
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[\-A/\-\-autobackup y/n] [\-d/\-\-debug] [\-f/\-\-force]
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[\-h/\-?/\-\-help] {\-l/\-\-extents [\-]LogicalExtentsNumber |
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\-L/\-\-size [\-]LogicalVolumeSize[kKmMgGtT]}
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[\-v/\-\-verbose] LogicalVolumePath
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.SH DESCRIPTION
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lvreduce allows you to reduce the size of a logical volume.
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Be careful when reducing a logical volume's size, because data in the
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reduced part is lost!!!
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.br
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You should therefore ensure that the (eg) filesystem on the volume is
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resized
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.i before
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running lvreduce so that the extents that are to be removed are not in use.
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If the filesystem is ext2 then you can use the
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.B e2fsadm(8)
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command to both resize the filesystem and the logical volume together.
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.br.
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Shrinking snapshot logical volumes (see
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.B lvcreate(8)
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for information to create snapshots) is supported as well.
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.SH OPTIONS
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See \fBlvm\fP for common options.
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.TP
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.I \-A, \-\-autobackup y/n
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Controls automatic backup of VG metadata after the change ( see
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.B vgcfgbackup(8)
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). Default is yes.
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.TP
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.I \-f, \-\-force
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Force size reduction without any question.
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.TP
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.I \-l, \-\-extents [\-]LogicalExtentsNumber
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Reduce or set the logical volume size in units of logical extents.
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With the - sign the value will be subtracted from
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the logical volume's actual size and without it the will be taken as
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an absolute size.
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.TP
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.I \-L, \-\-size [\-]LogicalVolumeSize[kKmMgGtT]
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Reduce or set the logical volume size in units of megabyte by default.
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A size suffix of k for kilobyte, m for megabyte, g for gigabyte or
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t for terabyte is optional.
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With the - sign the value will be subtracted from
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the logical volume's actual size and without it the will be taken as
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an absolute size.
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.SH Example
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"lvreduce -l -3 /dev/vg00/lvol1" reduces the size of logical volume lvol1
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in volume group vg00 by 3 logical extents.
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.SH SEE ALSO
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.BR lvm (8),
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.BR lvcreate (8),
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.BR lvextend (8),
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.BR lvchange (8)
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