lvextend
Add space to a logical volume
TLDR
Increase a volume's size to 120 GB
Increase a volume's size by 40 GB as well as the underlying filesystem
Increase a volume's size to 100% of the free physical volume space
SYNOPSIS
lvextend option_args
position_args
[ option_args ]
[ position_args ]
--alloc
contiguous|cling|cling_by_tags|normal|anywhere|inherit
-A|--autobackup
y|n
--commandprofile String
--config String
-d|--debug
--devices PV
--devicesfile String
--driverloaded
y|n
-l|--extents
[+]Number[PERCENT]
-f|--force
-h|--help
--journal String
--lockopt String
--longhelp
-m|--mirrors Number
-n|--nofsck
--nohints
--nolocking
--nosync
--noudevsync
--poolmetadatasize
[+]Size[m|UNIT]
--profile String
-q|--quiet
--reportformat
basic|json
-r|--resizefs
-L|--size
[+]Size[m|UNIT]
-i|--stripes Number
-I|--stripesize
Size[k|UNIT]
-t|--test
--type
linear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|vdo-pool|cache|cache-pool|writecache
--usepolicies
-v|--verbose
--version
-y|--yes
DESCRIPTION
lvextend extends the size of an LV. This requires allocating logical extents from the VG's free physical extents. If the extension adds a new LV segment, the new segment will use the existing segment type of the LV.
Extending a copy-on-write snapshot LV adds space for COW blocks.
Use lvconvert(8) to change the number of data images in a RAID or mirrored LV.
In the usage section below, --size Size can be replaced with --extents Number. See both descriptions the options section.
USAGE
Extend an LV by a specified size.
lvextend -L|--size
[+]Size[m|UNIT] LV
[ -l|--extents [+]Number[PERCENT] ]
[ -r|--resizefs ]
[ -i|--stripes Number ]
[ -I|--stripesize Size[k|UNIT] ]
[ --poolmetadatasize [+]Size[m|UNIT] ]
[ COMMON_OPTIONS ]
[ PV ... ]
—
Extend an LV by specified PV extents.
lvextend LV PV ...
[ -r|--resizefs ]
[ -i|--stripes Number ]
[ -I|--stripesize Size[k|UNIT] ]
[ COMMON_OPTIONS ]
—
Extend a pool metadata SubLV by a specified size.
lvextend --poolmetadatasize
[+]Size[m|UNIT] LV1
[ -i|--stripes Number ]
[ -I|--stripesize Size[k|UNIT] ]
[ COMMON_OPTIONS ]
[ PV ... ]
LV1 types: thinpool
—
Extend an LV according to a predefined policy.
lvextend --usepolicies
LV1
[ -r|--resizefs ]
[ COMMON_OPTIONS ]
[ PV ... ]
LV1 types: snapshot thinpool
—
Common options for command:
[ -A|--autobackup y|n ]
[ -f|--force ]
[ -m|--mirrors Number ]
[ -n|--nofsck ]
[ --alloccontiguous|cling|cling_by_tags|normal|anywhere|inherit
]
[ --nosync ]
[ --noudevsync ]
[ --reportformat basic|json ]
[ --typelinear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|vdo-pool|cache|cache-pool|writecache
]
Common options for lvm:
[ -d|--debug ]
[ -h|--help ]
[ -q|--quiet ]
[ -t|--test ]
[ -v|--verbose ]
[ -y|--yes ]
[ --commandprofile String ]
[ --config String ]
[ --devices PV ]
[ --devicesfile String ]
[ --driverloaded y|n ]
[ --journal String ]
[ --lockopt String ]
[ --longhelp ]
[ --nohints ]
[ --nolocking ]
[ --profile String ]
[ --version ]
OPTIONS
--alloc
contiguous|cling|cling_by_tags|normal|anywhere|inherit
Determines the allocation policy when a command needs to allocate
Physical Extents (PEs) from the VG. Each VG and LV has an allocation
policy which can be changed with vgchange/lvchange, or overridden on the
command line. normal applies common sense rules such as
not placing parallel stripes on the same PV. inherit
applies the VG policy to an LV. contiguous requires new
PEs be placed adjacent to existing PEs. cling places
new PEs on the same PV as existing PEs in the same stripe of the LV. If
there are sufficient PEs for an allocation, but normal does not use
them, anywhere will use them even if it reduces
performance, e.g. by placing two stripes on the same PV. Optional
positional PV args on the command line can also be used to limit which
PVs the command will use for allocation. See lvm(8) for
more information about allocation.
-A|--autobackup
y|n
Specifies if metadata should be backed up automatically after a change.
Enabling this is strongly advised! See vgcfgbackup(8)
for more information.
--commandprofile String
The command profile to use for command configuration. See
lvm.conf(5) for more information about profiles.
--config String
Config settings for the command. These override
lvm.conf(5) settings. The String arg uses the same
format as lvm.conf(5), or may use section/field syntax.
See lvm.conf(5) for more information about config.
-d|--debug ...
Set debug level. Repeat from 1 to 6 times to increase the detail of
messages sent to the log file and/or syslog (if configured).
--devices PV
Restricts the devices that are visible and accessible to the command.
Devices not listed will appear to be missing. This option can be
repeated, or accepts a comma separated list of devices. This overrides
the devices file.
--devicesfile String
A file listing devices that LVM should use. The file must exist in
/etc/lvm/devices/ and is managed with the
lvmdevices(8) command. This overrides the
lvm.conf(5) devices/devicesfile and
devices/use_devicesfile settings.
--driverloaded
y|n
If set to no, the command will not attempt to use device-mapper. For
testing and debugging.
-l|--extents
[+]Number[PERCENT]
Specifies the new size of the LV in logical extents. The --size and
--extents options are alternate methods of specifying size. The total
number of physical extents used will be greater when redundant data is
needed for RAID levels. An alternate syntax allows the size to be
determined indirectly as a percentage of the size of a related VG, LV,
or set of PVs. The suffix %VG denotes the total size of
the VG, the suffix %FREE the remaining free space in
the VG, and the suffix %PVS the free space in the
specified PVs. For a snapshot, the size can be expressed as a percentage
of the total size of the origin LV with the suffix
%ORIGIN (100%ORIGIN provides space for
the whole origin). When expressed as a percentage, the size defines an
upper limit for the number of logical extents in the new LV. The precise
number of logical extents in the new LV is not determined until the
command has completed. When the plus + or minus
- prefix is used, the value is not an absolute size,
but is relative and added or subtracted from the current size.
-f|--force ...
Override various checks, confirmations and protections. Use with extreme
caution.
-h|--help
Display help text.
--journal String
Record information in the systemd journal. This information is in
addition to information enabled by the lvm.conf log/journal setting.
command: record information about the command. output: record the
default command output. debug: record full command debugging.
--lockopt String
Used to pass options for special cases to lvmlockd. See
lvmlockd(8) for more information.
--longhelp
Display long help text.
-m|--mirrors Number
Not used.
-n|--nofsck
Do not perform fsck before resizing filesystem when filesystem requires
it. You may need to use --force to proceed with this option.
--nohints
Do not use the hints file to locate devices for PVs. A command may read
more devices to find PVs when hints are not used. The command will still
perform standard hint file invalidation where appropriate.
--nolocking
Disable locking. Use with caution, concurrent commands may produce
incorrect results.
--nosync
Causes the creation of mirror, raid1, raid4, raid5 and raid10 to skip
the initial synchronization. In case of mirror, raid1 and raid10, any
data written afterwards will be mirrored, but the original contents will
not be copied. In case of raid4 and raid5, no parity blocks will be
written, though any data written afterwards will cause parity blocks to
be stored. This is useful for skipping a potentially long and resource
intensive initial sync of an empty mirror/raid1/raid4/raid5 and raid10
LV. This option is not valid for raid6, because raid6 relies on proper
parity (P and Q Syndromes) being created during initial synchronization
in order to reconstruct proper user date in case of device failures.
raid0 and raid0_meta do not provide any data copies or parity support
and thus do not support initial synchronization.
--noudevsync
Disables udev synchronisation. The process will not wait for
notification from udev. It will continue irrespective of any possible
udev processing in the background. Only use this if udev is not running
or has rules that ignore the devices LVM creates.
--poolmetadatasize
[+]Size[m|UNIT]
Specifies the new size of the pool metadata LV. The plus prefix
+ can be used, in which case the value is added to the
current size.
--profile String
An alias for --commandprofile or --metadataprofile, depending on the
command.
-q|--quiet ...
Suppress output and log messages. Overrides --debug and --verbose.
Repeat once to also suppress any prompts with answer 'no'.
--reportformat
basic|json
Overrides current output format for reports which is defined globally by
the report/output_format setting in lvm.conf(5).
basic is the original format with columns and rows. If
there is more than one report per command, each report is prefixed with
the report name for identification. json produces
report output in JSON format. See lvmreport(7) for more
information.
-r|--resizefs
Resize underlying filesystem together with the LV using
fsadm(8).
-L|--size
[+]Size[m|UNIT]
Specifies the new size of the LV. The --size and --extents options are
alternate methods of specifying size. The total number of physical
extents used will be greater when redundant data is needed for RAID
levels. When the plus + or minus -
prefix is used, the value is not an absolute size, but is relative and
added or subtracted from the current size.
-i|--stripes Number
Specifies the number of stripes in a striped LV. This is the number of
PVs (devices) that a striped LV is spread across. Data that appears
sequential in the LV is spread across multiple devices in units of the
stripe size (see --stripesize). This does not change existing allocated
space, but only applies to space being allocated by the command. When
creating a RAID 4/5/6 LV, this number does not include the extra devices
that are required for parity. The largest number depends on the RAID
type (raid0: 64, raid10: 32, raid4/5: 63, raid6: 62), and when
unspecified, the default depends on the RAID type (raid0: 2, raid10: 2,
raid4/5: 3, raid6: 5.) To stripe a new raid LV across all PVs by
default, see lvm.conf(5)
allocation/raid_stripe_all_devices.
-I|--stripesize
Size[k|UNIT]
The amount of data that is written to one device before moving to the
next in a striped LV.
-t|--test
Run in test mode. Commands will not update metadata. This is implemented
by disabling all metadata writing but nevertheless returning success to
the calling function. This may lead to unusual error messages in
multi-stage operations if a tool relies on reading back metadata it
believes has changed but hasn't.
--type
linear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|vdo-pool|cache|cache-pool|writecache
The LV type, also known as "segment type" or "segtype". See usage
descriptions for the specific ways to use these types. For more
information about redundancy and performance
(raid<N>, mirror,
striped, linear) see
lvmraid(7). For thin provisioning
(thin, thin-pool) see
lvmthin(7). For performance caching
(cache, cache-pool) see
lvmcache(7). For copy-on-write snapshots
(snapshot) see usage definitions. For VDO
(vdo) see lvmvdo(7). Several commands
omit an explicit type option because the type is inferred from other
options or shortcuts (e.g. --stripes, --mirrors, --snapshot,
--virtualsize, --thin, --cache, --vdo). Use inferred types with care
because it can lead to unexpected results.
--usepolicies
Perform an operation according to the policy configured in
lvm.conf(5) or a profile.
-v|--verbose ...
Set verbose level. Repeat from 1 to 4 times to increase the detail of
messages sent to stdout and stderr.
--version
Display version information.
-y|--yes
Do not prompt for confirmation interactively but always assume the
answer yes. Use with extreme caution. (For automatic no, see -qq.)
VARIABLES
- LV
-
Logical Volume name. See lvm(8) for valid names. An LV positional arg generally includes the VG name and LV name, e.g. VG/LV. LV1 indicates the LV must have a specific type, where the accepted LV types are listed. (raid represents raid<N> type).
- PV
-
Physical Volume name, a device path under /dev. For commands managing physical extents, a PV positional arg generally accepts a suffix indicating a range (or multiple ranges) of physical extents (PEs). When the first PE is omitted, it defaults to the start of the device, and when the last PE is omitted it defaults to end. Start and end range (inclusive): PV[:PE-PE]... Start and length range (counting from 0): PV[:PE+PE]...
- String
-
See the option description for information about the string content.
- Size[UNIT]
-
Size is an input number that accepts an optional unit. Input units are always treated as base two values, regardless of capitalization, e.g. 'k' and 'K' both refer to 1024. The default input unit is specified by letter, followed by |UNIT. UNIT represents other possible input units: b|B is bytes, s|S is sectors of 512 bytes, k|K is KiB, m|M is MiB, g|G is GiB, t|T is TiB, p|P is PiB, e|E is EiB. (This should not be confused with the output control --units, where capital letters mean multiple of 1000.)
ENVIRONMENT VARIABLES
See lvm(8) for information about environment variables used by lvm. For example, LVM_VG_NAME can generally be substituted for a required VG parameter.
EXAMPLES
Extend the size of an LV by 54MiB, using a specific PV.
lvextend -L +54 vg01/lvol10 /dev/sdk3
Extend the size of an LV by the amount of free space on PV /dev/sdk3.
This is equivalent to specifying "-l +100%PVS" on the command
line.
lvextend vg01/lvol01 /dev/sdk3
Extend an LV by 16MiB using specific physical extents.
lvextend -L+16m vg01/lvol01 /dev/sda:8-9
/dev/sdb:8-9
Extend an LV to use all remaining free space in volume group and all
resize its filesystem with fsadm(8).
lvextend -l+100%FREE -r vg01/lvol01
SEE ALSO
lvm(8), lvm.conf(5), lvmconfig(8), lvmdevices(8), pvchange(8), pvck(8), pvcreate(8), pvdisplay(8), pvmove(8), pvremove(8), pvresize(8), pvs(8), pvscan(8), vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8), vgcreate(8), vgconvert(8), vgdisplay(8), vgexport(8), vgextend(8), vgimport(8), vgimportclone(8), vgimportdevices(8), vgmerge(8), vgmknodes(8), vgreduce(8), vgremove(8), vgrename(8), vgs(8), vgscan(8), vgsplit(8), lvcreate(8), lvchange(8), lvconvert(8), lvdisplay(8), lvextend(8), lvreduce(8), lvremove(8), lvrename(8), lvresize(8), lvs(8), lvscan(8), lvm-fullreport(8), lvm-lvpoll(8), blkdeactivate(8), lvmdump(8), dmeventd(8), lvmpolld(8), lvmlockd(8), lvmlockctl(8), cmirrord(8), lvmdbusd(8), fsadm(8), lvmsystemid(7), lvmreport(7), lvmraid(7), lvmthin(7), lvmcache(7)