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82 lines
3.2 KiB
Groff
82 lines
3.2 KiB
Groff
.TH LVRESIZE 8 "LVM TOOLS #VERSION#" "Sistina Software UK" \" -*- nroff -*-
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.SH NAME
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lvresize \- resize a logical volume
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.SH SYNOPSIS
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.B lvresize
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[\-\-alloc AllocationPolicy]
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[\-A|\-\-autobackup y|n] [\-d|\-\-debug] [\-h|\-?|\-\-help]
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[\-\-noudevsync]
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[\-i|\-\-stripes Stripes [\-I|\-\-stripesize StripeSize]]
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{\-l|\-\-extents [+]LogicalExtentsNumber[%{VG|LV|PVS|FREE}] |
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\-L|\-\-size [+]LogicalVolumeSize[bBsSkKmMgGtTpPeE]}
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[\-t|\-\-test]
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[\-v|\-\-verbose] LogicalVolumePath [PhysicalVolumePath[:PE[-PE]]...]
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.SH DESCRIPTION
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lvresize allows you to resize a logical volume.
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Be careful when reducing a logical volume's size, because data in the reduced
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part is lost!!!
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You should therefore ensure that any filesystem on the volume is
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shrunk first so that the extents that are to be removed are not in use.
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Resizing snapshot logical volumes (see
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.B lvcreate(8)
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for information about creating snapshots) is supported as well.
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But to change the number of copies in a mirrored logical
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volume use
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.BR lvconvert (8).
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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 \-\-noudevsync
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Disable udev synchronisation. The
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process will not wait for notification from udev.
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It will continue irrespective of any possible udev processing
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in the background. You should only use this if udev is not running
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or has rules that ignore the devices LVM2 creates.
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.TP
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.I \-l, \-\-extents [+|-]LogicalExtentsNumber[%{VG|LV|PVS|FREE}]
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Change or set the logical volume size in units of logical extents.
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With the + or - sign the value is added to or subtracted from the actual size
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of the logical volume and without it, the value is taken as an absolute one.
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The number can also be expressed as a percentage of the total space
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in the Volume Group with the suffix %VG, relative to the existing
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size of the Logical Volume with the suffix %LV, as a percentage of
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the remaining free space of the PhysicalVolumes on the command line with the
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suffix %PVS, or as a percentage of the remaining free space in the
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Volume Group with the suffix %FREE.
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.TP
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.I \-L, \-\-size [+|-]LogicalVolumeSize[bBsSkKmMgGtTpPeE]
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Change or set the logical volume size in units of megabytes.
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A size suffix of M for megabytes,
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G for gigabytes, T for terabytes, P for petabytes
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or E for exabytes is optional.
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With the + or - sign the value is added to or subtracted from
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the actual size of the logical volume and without it, the value is taken as an
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absolute one.
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.TP
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.I \-i, \-\-stripes Stripes
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Gives the number of stripes to use when extending a Logical Volume.
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Defaults to whatever the last segment of the Logical Volume uses.
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Not applicable to LVs using the original metadata LVM format, which must
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use a single value throughout.
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.TP
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.I \-I, \-\-stripesize StripeSize
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Gives the number of kilobytes for the granularity of the stripes.
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Defaults to whatever the last segment of the Logical Volume uses.
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Not applicable to LVs using the original metadata LVM format, which
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must use a single value throughout.
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.br
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StripeSize must be 2^n (n = 2 to 9)
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.SH Examples
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.br
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"lvresize -L+16M vg1/lv1 /dev/sda:0-1 /dev/sdb:0-1"
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.br
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tries to extend a logical volume "vg1/lv1" by 16MB using physical extents
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/dev/sda:0-1 and /dev/sdb:0-1 for allocation of extents.
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.SH SEE ALSO
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.BR lvm (8),
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.BR lvconvert (8),
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.BR lvcreate (8),
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.BR lvreduce (8),
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.BR lvchange (8)
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