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133 lines
4.8 KiB
Groff
133 lines
4.8 KiB
Groff
.TH LVEXTEND 8 "LVM TOOLS #VERSION#" "Sistina Software UK" \" -*- nroff -*-
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.SH NAME
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lvextend \(em extend the size of a logical volume
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.SH SYNOPSIS
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.B lvextend
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.RB [ \-\-alloc
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.IR AllocationPolicy ]
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.RB [ \-A | \-\-autobackup
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.RI { y | n }]
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.RB [ \-\-commandprofile
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.IR ProfileName ]
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.RB [ \-d | \-\-debug ]
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.RB [ \-h | \-? | \-\-help ]
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.RB [ \-f | \-\-force ]
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.RB [ \-i | \-\-stripes
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.I Stripes
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.RB [ \-I | \-\-stripesize
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.IR StripeSize ]]
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.RB { \-l | \-\-extents
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.RI [ + ] LogicalExtentsNumber [ % { VG | LV | PVS | FREE | ORIGIN }]
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.BR \-L | \-\-size
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.RI [ + ] LogicalVolumeSize [ bBsSkKmMgGtTpPeE ]}
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.RB [ \-n | \-\-nofsck ]
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.RB [ \-\-noudevsync]
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.RB [ \-r | \-\-resizefs ]
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.RB [ \-\-use\-policies ]
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.RB [ \-t | \-\-test ]
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.RB [ \-v | \-\-verbose ]
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.I LogicalVolumePath
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.RI [ PhysicalVolumePath [ :PE [ \-PE ]]...]
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.SH DESCRIPTION
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lvextend allows you to extend the size of a logical volume.
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Extension of snapshot logical volumes (see
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.BR lvcreate (8)
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for information to create 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(8) for common options.
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.TP
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.BR \-f ", " \-\-force
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Proceed with size extension without prompting.
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.TP
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.IR \fB\-l ", " \fB\-\-extents " [" + ] LogicalExtentsNumber [ % { VG | LV | PVS | FREE | ORIGIN }]
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Extend or set the logical volume size in units of logical extents.
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With the '\fI+\fP' sign the value is added to 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 total number of physical extents allocated will be
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greater than this, for example, if the volume is mirrored.
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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 \fI%VG\fP, relative to the existing
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size of the Logical Volume with the suffix \fI%LV\fP, of the remaining
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free space for the specified PhysicalVolume(s) with the suffix \fI%PVS\fP,
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as a percentage of the remaining free space in the Volume Group
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with the suffix \fI%FREE\fP, or (for a snapshot) as a percentage of the total
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space in the Origin Logical Volume with the suffix \fI%ORIGIN\fP.
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The resulting value is rounded upward.
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N.B. In a future release, when expressed as a percentage with PVS, VG or FREE,
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the number will be treated as an approximate upper limit for the total number
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of physical extents to be allocated (including extents used by any mirrors, for
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example). The code may currently allocate more space than you might otherwise
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expect.
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.TP
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.IR \fB\-L ", " \fB\-\-size " [" + ] LogicalVolumeSize [ bBsSkKmMgGtTpPeE ]
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Extend 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 + sign the value is added to 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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.TP
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.BR \-i ", " \-\-stripes " " \fIStripes
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Gives the number of stripes for the extension.
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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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.BR \-I ", " \-\-stripesize " " \fIStripeSize
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Gives the number of kilobytes for the granularity of the stripes.
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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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.br
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StripeSize must be 2^n (n = 2 to 9)
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.TP
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.BR \-n ", " \-\-nofsck
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Do not perform fsck before extending filesystem when filesystem
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requires it. You may need to use \fB\-\-force\fR to proceed with
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this option.
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.TP
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.B \-\-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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.BR \-r ", " \-\-resizefs
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Resize underlying filesystem together with the logical volume using
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\fBfsadm\fR(8).
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.TP
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.B \-\-use\-policies
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Resizes the logical volume according to configured policy. See
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\fBlvm.conf\fR(5) for some details.
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.SH Examples
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Extends the size of the logical volume "vg01/lvol10" by 54MiB on physical
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volume /dev/sdk3. This is only possible if /dev/sdk3 is a member of
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volume group vg01 and there are enough free physical extents in it:
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.sp
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.B lvextend \-L +54 /dev/vg01/lvol10 /dev/sdk3
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Extends the size of logical volume "vg01/lvol01" by the amount of free
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space on physical volume /dev/sdk3. This is equivalent to specifying
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"\-l +100%PVS" on the command line:
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.sp
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.B lvextend /dev/vg01/lvol01 /dev/sdk3
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Extends a logical volume "vg01/lvol01" by 16MiB using physical extents
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/dev/sda:8\-9 and /dev/sdb:8\-9 for allocation of extents:
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.sp
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.B lvextend -L+16M vg01/lvol01 /dev/sda:8\-9 /dev/sdb:8\-9
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.SH SEE ALSO
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.BR fsadm (8),
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.BR lvm (8),
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.BR lvm.conf (5),
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.BR lvcreate (8),
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.BR lvconvert (8),
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.BR lvreduce (8),
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.BR lvresize (8),
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.BR lvchange (8)
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