--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
Devices that the command can use. 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.
--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.
--nolocking
Disable locking.
--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.)
