Provided by: lvm2_2.02.176-4.1ubuntu4_amd64 bug

NAME

       lvcreate - Create a logical volume

SYNOPSIS

       lvcreate option_args position_args
           [ option_args ]
           [ position_args ]

        -a|--activate y|n|ay
           --addtag Tag
           --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
        -A|--autobackup y|n
        -H|--cache
           --cachemetadataformat auto|1|2
           --cachemode writethrough|writeback|passthrough
           --cachepolicy String
           --cachepool LV
           --cachesettings String
        -c|--chunksize Size[k|UNIT]
           --commandprofile String
           --config String
        -C|--contiguous y|n
        -d|--debug
           --discards passdown|nopassdown|ignore
           --driverloaded y|n
           --errorwhenfull y|n
        -l|--extents Number[PERCENT]
        -h|--help
        -K|--ignoreactivationskip
           --ignoremonitoring
           --longhelp
        -j|--major Number
           --[raid]maxrecoveryrate Size[k|UNIT]
           --metadataprofile String
           --minor Number
           --[raid]minrecoveryrate Size[k|UNIT]
           --mirrorlog core|disk
        -m|--mirrors Number
           --monitor y|n
        -n|--name String
           --nosync
           --noudevsync
        -p|--permission rw|r
        -M|--persistent y|n
           --poolmetadatasize Size[m|UNIT]
           --poolmetadataspare y|n
           --profile String
        -q|--quiet
        -r|--readahead auto|none|Number
        -R|--regionsize Size[m|UNIT]
           --reportformat basic|json
        -k|--setactivationskip y|n
        -L|--size Size[m|UNIT]
        -s|--snapshot
        -i|--stripes Number
        -I|--stripesize Size[k|UNIT]
        -t|--test
        -T|--thin
           --thinpool LV
           --type linear|striped|snapshot|mirror|raid|thin|cache|thin-pool|cache-pool
        -v|--verbose
           --version
        -V|--virtualsize Size[m|UNIT]
        -W|--wipesignatures y|n
        -y|--yes
        -Z|--zero y|n

DESCRIPTION

       lvcreate  creates  a  new  LV  in a VG. For standard LVs, this requires allocating logical
       extents from the VG's free physical extents. If there is not enough free space, the VG can
       be  extended  with  other  PVs  (vgextend(8)),  or  existing LVs can be reduced or removed
       (lvremove(8), lvreduce(8).)

       To control which PVs a new LV will use, specify one or more PVs as position  args  at  the
       end  of  the command line. lvcreate will allocate physical extents only from the specified
       PVs.

       lvcreate can also create snapshots of existing LVs, e.g. for backup purposes. The data  in
       a new snapshot LV represents the content of the original LV from the time the snapshot was
       created.

       RAID LVs can be created by specifying an LV type when creating the  LV  (see  lvmraid(7)).
       Different  RAID  levels require different numbers of unique PVs be available in the VG for
       allocation.

       Thin pools (for thin provisioning) and  cache  pools  (for  caching)  are  represented  by
       special LVs with types thin-pool and cache-pool (see lvmthin(7) and lvmcache(7)). The pool
       LVs are not usable as standard block devices, but the LV names act as  references  to  the
       pools.

       Thin  LVs  are  thinly  provisioned  from a thin pool, and are created with a virtual size
       rather than a physical size. A cache LV is the combination of a standard LV with  a  cache
       pool, used to cache active portions of the LV to improve performance.

   Usage notes
       In  the  usage  section  below,  --size  Size  can  be replaced with --extents Number. See
       descriptions in the options section.

       In the usage section below, --name is omitted from the required options, even though it is
       typically used. When the name is not specified, a new LV name is generated with the "lvol"
       prefix and a unique numeric suffix.

USAGE

       Create a linear LV.

       lvcreate -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [    --type linear ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a striped LV (infers --type striped).

       lvcreate -i|--stripes Number -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -I|--stripesize Size[k|UNIT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a raid1 or mirror LV (infers --type raid1|mirror).

       lvcreate -m|--mirrors Number -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -R|--regionsize Size[m|UNIT] ]
           [    --mirrorlog core|disk ]
           [    --[raid]minrecoveryrate Size[k|UNIT] ]
           [    --[raid]maxrecoveryrate Size[k|UNIT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a raid LV (a specific raid level must be used, e.g. raid1).

       lvcreate --type raid -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -m|--mirrors Number ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [ -R|--regionsize Size[m|UNIT] ]
           [    --[raid]minrecoveryrate Size[k|UNIT] ]
           [    --[raid]maxrecoveryrate Size[k|UNIT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a raid10 LV.

       lvcreate -m|--mirrors Number -i|--stripes Number
             -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -I|--stripesize Size[k|UNIT] ]
           [ -R|--regionsize Size[m|UNIT] ]
           [    --[raid]minrecoveryrate Size[k|UNIT] ]
           [    --[raid]maxrecoveryrate Size[k|UNIT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a COW snapshot LV of an origin LV.

       lvcreate -s|--snapshot -L|--size Size[m|UNIT] LV
           [ -l|--extents Number[PERCENT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [ -c|--chunksize Size[k|UNIT] ]
           [    --type snapshot ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a thin pool.

       lvcreate --type thin-pool -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --thinpool LV_new ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a cache pool.

       lvcreate --type cache-pool -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -H|--cache ]
           [ -c|--chunksize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --cachemode writethrough|writeback|passthrough ]
           [    --cachepolicy String ]
           [    --cachesettings String ]
           [    --cachemetadataformat auto|1|2 ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a thin LV in a thin pool (infers --type thin).

       lvcreate -V|--virtualsize Size[m|UNIT] --thinpool LV_thinpool VG
           [ -T|--thin ]
           [    --type thin ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
       -

       Create a thin LV that is a snapshot of an existing thin LV
       (infers --type thin).

       lvcreate -s|--snapshot LV_thin
           [    --type thin ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
       -

       Create a thin LV that is a snapshot of an external origin LV.

       lvcreate --type thin --thinpool LV_thinpool LV
           [ -T|--thin ]
           [ -c|--chunksize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
       -

       Create a thin LV, first creating a thin pool for it,
       where the new thin pool is named by the --thinpool arg.

       lvcreate --type thin -V|--virtualsize Size[m|UNIT]
             -L|--size Size[m|UNIT] --thinpool LV_new
           [ -l|--extents Number[PERCENT] ]
           [ -T|--thin ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a cache LV, first creating a new origin LV,
       then combining it with the existing cache pool named
       by the --cachepool arg.

       lvcreate --type cache -L|--size Size[m|UNIT]
             --cachepool LV_cachepool VG
           [ -l|--extents Number[PERCENT] ]
           [ -H|--cache ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --cachemode writethrough|writeback|passthrough ]
           [    --cachepolicy String ]
           [    --cachesettings String ]
           [    --cachemetadataformat auto|1|2 ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Common options for command:
           [ -a|--activate y|n|ay ]
           [ -A|--autobackup y|n ]
           [ -C|--contiguous y|n ]
           [ -K|--ignoreactivationskip ]
           [ -j|--major Number ]
           [ -n|--name String ]
           [ -p|--permission rw|r ]
           [ -M|--persistent y|n ]
           [ -r|--readahead auto|none|Number ]
           [ -k|--setactivationskip y|n ]
           [ -W|--wipesignatures y|n ]
           [ -Z|--zero y|n ]
           [    --addtag Tag ]
           [    --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit ]
           [    --ignoremonitoring ]
           [    --metadataprofile String ]
           [    --minor Number ]
           [    --monitor y|n ]
           [    --nosync ]
           [    --noudevsync ]
           [    --reportformat basic|json ]

       Common options for lvm:
           [ -d|--debug ]
           [ -h|--help ]
           [ -q|--quiet ]
           [ -t|--test ]
           [ -v|--verbose ]
           [ -y|--yes ]
           [    --commandprofile String ]
           [    --config String ]
           [    --driverloaded y|n ]
           [    --longhelp ]
           [    --profile String ]
           [    --version ]

OPTIONS

       -a|--activate y|n|ay
              Controls the active state of the new LV.  y makes the LV active, or available.  New
              LVs are made active by default.  n makes the LV inactive, or unavailable, only when
              possible.  In some cases, creating an LV requires it to be active.  For example,
              COW snapshots of an active origin LV can only be created in the active state (this
              does not apply to thin snapshots).  The --zero option normally requires the LV to
              be active.  If autoactivation ay is used, the LV is only activated if it matches an
              item in lvm.conf activation/auto_activation_volume_list.  ay implies --zero n and
              --wipesignatures n.  See lvmlockd(8) for more information about activation options
              for shared VGs.  See clvmd(8) for more information about activation options for
              clustered VGs.

       --addtag Tag
              Adds a tag to a PV, VG or LV. This option can be repeated to add multiple tags at
              once. See lvm(8) for information about tags.

       --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 overriden 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.

       -H|--cache
              Specifies the command is handling a cache LV or cache pool.  See --type cache and
              --type cache-pool.  See lvmcache(7) for more information about LVM caching.

       --cachemetadataformat auto|1|2
              Specifies the cache metadata format used by cache target.

       --cachemode writethrough|writeback|passthrough
              Specifies when writes to a cache LV should be considered complete.  writeback
              considers a write complete as soon as it is stored in the cache pool.  writethough
              considers a write complete only when it has been stored in both the cache pool and
              on the origin LV.  While writethrough may be slower for writes, it is more
              resilient if something should happen to a device associated with the cache pool LV.
              With passthrough, all reads are served from the origin LV (all reads miss the
              cache) and all writes are forwarded to the origin LV; additionally, write hits
              cause cache block invalidates. See lvmcache(7) for more information.

       --cachepolicy String
              Specifies the cache policy for a cache LV.  See lvmcache(7) for more information.

       --cachepool LV
              The name of a cache pool LV.

       --cachesettings String
              Specifies tunable values for a cache LV in "Key = Value" form.  Repeat this option
              to specify multiple values.  (The default values should usually be adequate.)  The
              special string value default switches settings back to their default kernel values
              and removes them from the list of settings stored in LVM metadata.  See lvmcache(7)
              for more information.

       -c|--chunksize Size[k|UNIT]
              The size of chunks in a snapshot, cache pool or thin pool.  For snapshots, the
              value must be a power of 2 between 4KiB and 512KiB and the default value is 4.  For
              a cache pool the value must be between 32KiB and 1GiB and the default value is 64.
              For a thin pool the value must be between 64KiB and 1GiB and the default value
              starts with 64 and scales up to fit the pool metadata size within 128MiB, if the
              pool metadata size is not specified.  The value must be a multiple of 64KiB.  See
              lvmthin(7) and lvmcache(7) 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 settings.  The String arg
              uses the same format as lvm.conf, or may use section/field syntax.  See lvm.conf(5)
              for more information about config.

       -C|--contiguous y|n
              Sets or resets the contiguous allocation policy for LVs.  Default is no contiguous
              allocation based on a next free principle.  It is only possible to change a non-
              contiguous allocation policy to contiguous if all of the allocated physical extents
              in the LV are already contiguous.

       -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).

       --discards passdown|nopassdown|ignore
              Specifies how the device-mapper thin pool layer in the kernel should handle
              discards.  ignore causes the thin pool to ignore discards.  nopassdown causes the
              thin pool to process discards itself to allow reuse of unneeded extents in the thin
              pool.  passdown causes the thin pool to process discards itself (like nopassdown)
              and pass the discards to the underlying device.  See lvmthin(7) for more
              information.

       --driverloaded y|n
              If set to no, the command will not attempt to use device-mapper.  For testing and
              debugging.

       --errorwhenfull y|n
              Specifies thin pool behavior when data space is exhausted.  When yes, device-mapper
              will immediately return an error when a thin pool is full and an I/O request
              requires space.  When no, device-mapper will queue these I/O requests for a period
              of time to allow the thin pool to be extended.  Errors are returned if no space is
              available after the timeout.  (Also see dm-thin-pool kernel module option
              no_space_timeout.)  See lvmthin(7) for more information.

       -l|--extents Number[PERCENT]
              Specifies the size of the new 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.

       -h|--help
              Display help text.

       -K|--ignoreactivationskip
              Ignore the "activation skip" LV flag during activation to allow LVs with the flag
              set to be activated.

       --ignoremonitoring
              Do not interact with dmeventd unless --monitor is specified.  Do not use this if
              dmeventd is already monitoring a device.

       --longhelp
              Display long help text.

       -j|--major Number
              Sets the major number of an LV block device.

       --[raid]maxrecoveryrate Size[k|UNIT]
              Sets the maximum recovery rate for a RAID LV.  The rate value is an amount of data
              per second for each device in the array.  Setting the rate to 0 means it will be
              unbounded.  See lvmraid(7) for more information.

       --metadataprofile String
              The metadata profile to use for command configuration.  See lvm.conf(5) for more
              information about profiles.

       --minor Number
              Sets the minor number of an LV block device.

       --[raid]minrecoveryrate Size[k|UNIT]
              Sets the minimum recovery rate for a RAID LV.  The rate value is an amount of data
              per second for each device in the array.  Setting the rate to 0 means it will be
              unbounded.  See lvmraid(7) for more information.

       --mirrorlog core|disk
              Specifies the type of mirror log for LVs with the "mirror" type (does not apply to
              the "raid1" type.)  disk is a persistent log and requires a small amount of storage
              space, usually on a separate device from the data being mirrored.  core is not
              persistent; the log is kept only in memory.  In this case, the mirror must be
              synchronized (by copying LV data from the first device to others) each time the LV
              is activated, e.g. after reboot.  mirrored is a persistent log that is itself
              mirrored, but should be avoided. Instead, use the raid1 type for log redundancy.

       -m|--mirrors Number
              Specifies the number of mirror images in addition to the original LV image, e.g.
              --mirrors 1 means there are two images of the data, the original and one mirror
              image.  Optional positional PV args on the command line can specify the devices the
              images should be placed on.  There are two mirroring implementations: "raid1" and
              "mirror".  These are the names of the corresponding LV types, or "segment types".
              Use the --type option to specify which to use (raid1 is default, and mirror is
              legacy) Use lvm.conf global/mirror_segtype_default and
              global/raid10_segtype_default to configure the default types.  See the --nosync
              option for avoiding initial image synchronization.  See lvmraid(7) for more
              information.

       --monitor y|n
              Start (yes) or stop (no) monitoring an LV with dmeventd.  dmeventd monitors kernel
              events for an LV, and performs automated maintenance for the LV in reponse to
              specific events.  See dmeventd(8) for more information.

       -n|--name String
              Specifies the name of a new LV.  When unspecified, a default name of "lvol#" is
              generated, where # is a number generated by LVM.

       --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.

       -p|--permission rw|r
              Set access permission to read only r or read and write rw.

       -M|--persistent y|n
              When yes, makes the specified minor number persistent.

       --poolmetadatasize Size[m|UNIT]
              Specifies the size of the new pool metadata LV.

       --poolmetadataspare y|n
              Enable or disable the automatic creation and management of a spare pool metadata LV
              in the VG. A spare metadata LV is reserved space that can be used when repairing a
              pool.

       --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'.

       -r|--readahead auto|none|Number
              Sets read ahead sector count of an LV.  auto is the default which allows the kernel
              to choose a suitable value automatically.  none is equivalent to zero.

       -R|--regionsize Size[m|UNIT]
              Size of each raid or mirror synchronization region.  lvm.conf
              activation/raid_region_size can be used to configure a default.

       --reportformat basic|json
              Overrides current output format for reports which is defined globally by the
              report/output_format setting in lvm.conf.  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.

       -k|--setactivationskip y|n
              Persistently sets (yes) or clears (no) the "activation skip" flag on an LV.  An LV
              with this flag set is not activated unless the --ignoreactivationskip option is
              used by the activation command.  This flag is set by default on new thin snapshot
              LVs.  The flag is not applied to deactivation.  The current value of the flag is
              indicated in the lvs lv_attr bits.

       -L|--size Size[m|UNIT]
              Specifies the size of the new 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.

       -s|--snapshot
              Create a snapshot. Snapshots provide a "frozen image" of an origin LV.  The
              snapshot LV can be used, e.g. for backups, while the origin LV continues to be
              used.  This option can create a COW (copy on write) snapshot, or a thin snapshot
              (in a thin pool.)  Thin snapshots are created when the origin is a thin LV and the
              size option is NOT specified. Thin snapshots share the same blocks in the thin
              pool, and do not allocate new space from the VG.  Thin snapshots are created with
              the "activation skip" flag, see --setactivationskip.  A thin snapshot of a non-thin
              "external origin" LV is created when a thin pool is specified. Unprovisioned blocks
              in the thin snapshot LV are read from the external origin LV. The external origin
              LV must be read-only.  See lvmthin(7) for more information about LVM thin
              provisioning.  COW snapshots are created when a size is specified. The size is
              allocated from space in the VG, and is the amount of space that can be used for
              saving COW blocks as writes occur to the origin or snapshot.  The size chosen
              should depend upon the amount of writes that are expected; often 20% of the origin
              LV is enough. If COW space runs low, it can be extended with lvextend (shrinking is
              also allowed with lvreduce.)  A small amount of the COW snapshot LV size is used to
              track COW block locations, so the full size is not available for COW data blocks.
              Use lvs to check how much space is used, and see --monitor to to automatically
              extend the size to avoid running out of space.

       -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
              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.

       -T|--thin
              Specifies the command is handling a thin LV or thin pool.  See --type thin, --type
              thin-pool, and --virtualsize.  See lvmthin(7) for more information about LVM thin
              provisioning.

       --thinpool LV
              The name of a thin pool LV.

       --type linear|striped|snapshot|mirror|raid|thin|cache|thin-pool|cache-pool
              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.  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).  Use inferred types with care because it can lead
              to unexpected results.

       -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.

       -V|--virtualsize Size[m|UNIT]
              The virtual size of a new thin LV.  See lvmthin(7) for more information about LVM
              thin provisioning.  Using virtual size (-V) and actual size (-L) together creates a
              sparse LV.  lvm.conf global/sparse_segtype_default determines the default segment
              type used to create a sparse LV.  Anything written to a sparse LV will be returned
              when reading from it.  Reading from other areas of the LV will return blocks of
              zeros.  When using a snapshot to create a sparse LV, a hidden virtual device is
              created using the zero target, and the LV has the suffix _vorigin.  Snapshots are
              less efficient than thin provisioning when creating large sparse LVs (GiB).

       -W|--wipesignatures y|n
              Controls detection and subsequent wiping of signatures on new LVs.  There is a
              prompt for each signature detected to confirm its wiping (unless --yes is used to
              override confirmations.)  When not specified, signatures are wiped whenever zeroing
              is done (see --zero). This behaviour can be configured with lvm.conf
              allocation/wipe_signatures_when_zeroing_new_lvs.  If blkid wiping is used (lvm.conf
              allocation/use_blkid_wiping) and LVM is compiled with blkid wiping support, then
              the blkid(8) library is used to detect the signatures (use blkid -k to list the
              signatures that are recognized).  Otherwise, native LVM code is used to detect
              signatures (only MD RAID, swap and LUKS signatures are detected in this case.)  The
              LV is not wiped if the read only flag is set.

       -y|--yes
              Do not prompt for confirmation interactively but always assume the answer yes. Use
              with extreme caution.  (For automatic no, see -qq.)

       -Z|--zero y|n
              Controls zeroing of the first 4KiB of data in the new LV.  Default is y.  Snapshot
              COW volumes are always zeroed.  LV is not zeroed if the read only flag is set.
              Warning: trying to mount an unzeroed LV can cause the system to hang.

VARIABLES

       VG
              Volume Group name.  See lvm(8) for valid names.   For  lvcreate,  the  required  VG
              positional  arg may be omitted when the VG name is included in another option, e.g.
              --name VG/LV.

       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.  LV followed by _<type> indicates
              that an LV of the given type is required. (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: bBsSkKmMgGtTpPeE.  b|B is bytes, s|S is
              sectors  of 512 bytes, k|K is kilobytes, m|M is megabytes, g|G is gigabytes, t|T is
              terabytes, p|P is petabytes, e|E is exabytes.  (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.

ADVANCED USAGE

       Alternate command forms, advanced command usage, and  listing  of  all  valid  syntax  for
       completeness.

       Create an LV that returns errors when used.

       lvcreate --type error -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ COMMON_OPTIONS ]
       -

       Create an LV that returns zeros when read.

       lvcreate --type zero -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ COMMON_OPTIONS ]
       -

       Create a linear LV.

       lvcreate --type linear -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a striped LV (also see lvcreate --stripes).

       lvcreate --type striped -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a mirror LV (also see --type raid1).

       lvcreate --type mirror -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -m|--mirrors Number ]
           [ -R|--regionsize Size[m|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --mirrorlog core|disk ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a COW snapshot LV of an origin LV
       (also see --snapshot).

       lvcreate --type snapshot -L|--size Size[m|UNIT] LV
           [ -l|--extents Number[PERCENT] ]
           [ -s|--snapshot ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a sparse COW snapshot LV of a virtual origin LV
       (also see --snapshot).

       lvcreate --type snapshot -L|--size Size[m|UNIT]
             -V|--virtualsize Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -s|--snapshot ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a sparse COW snapshot LV of a virtual origin LV.

       lvcreate -s|--snapshot -L|--size Size[m|UNIT]
             -V|--virtualsize Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -c|--chunksize Size[k|UNIT] ]
           [    --type snapshot ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a thin pool (infers --type thin-pool).

       lvcreate -T|--thin -L|--size Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --type thin-pool ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a thin pool named by the --thinpool arg
       (infers --type thin-pool).

       lvcreate -L|--size Size[m|UNIT] --thinpool LV_new VG
           [ -l|--extents Number[PERCENT] ]
           [ -T|--thin ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --type thin-pool ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a cache pool named by the --cachepool arg
       (variant, uses --cachepool in place of --name).

       lvcreate --type cache-pool -L|--size Size[m|UNIT]
             --cachepool LV_new VG
           [ -l|--extents Number[PERCENT] ]
           [ -H|--cache ]
           [ -c|--chunksize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --cachemode writethrough|writeback|passthrough ]
           [    --cachepolicy String ]
           [    --cachesettings String ]
           [    --cachemetadataformat auto|1|2 ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a thin LV in a thin pool.

       lvcreate --type thin -V|--virtualsize Size[m|UNIT]
             --thinpool LV_thinpool VG
           [ -T|--thin ]
           [ -c|--chunksize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
       -

       Create a thin LV in a thin pool named in the first arg
       (variant, also see --thinpool for naming pool).

       lvcreate --type thin -V|--virtualsize Size[m|UNIT] LV_thinpool
           [ -T|--thin ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
       -

       Create a thin LV in the thin pool named in the first arg
       (variant, infers --type thin, also see --thinpool for
       naming pool.)

       lvcreate -V|--virtualsize Size[m|UNIT] LV_thinpool
           [ -T|--thin ]
           [    --type thin ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
       -

       Create a thin LV that is a snapshot of an existing thin LV.

       lvcreate --type thin LV_thin
           [ -T|--thin ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
       -

       Create a thin LV that is a snapshot of an existing thin LV
       (infers --type thin).

       lvcreate -T|--thin LV_thin
           [    --type thin ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
       -

       Create a thin LV that is a snapshot of an external origin LV
       (infers --type thin).

       lvcreate -s|--snapshot --thinpool LV_thinpool LV
           [    --type thin ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
       -

       Create a thin LV, first creating a thin pool for it,
       where the new thin pool is named by the --thinpool arg
       (variant, infers --type thin).

       lvcreate -V|--virtualsize Size[m|UNIT] -L|--size Size[m|UNIT]
             --thinpool LV_new
           [ -l|--extents Number[PERCENT] ]
           [ -T|--thin ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a thin LV, first creating a thin pool for it,
       where the new thin pool is named by the --thinpool arg
       (variant, infers --type thin).

       lvcreate -V|--virtualsize Size[m|UNIT] -L|--size Size[m|UNIT]
             --thinpool LV_new VG
           [ -l|--extents Number[PERCENT] ]
           [ -T|--thin ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a thin LV, first creating a thin pool for it,
       where the new thin pool is named in the first arg,
       or the new thin pool name is generated when the first
       arg is a VG name.

       lvcreate --type thin -V|--virtualsize Size[m|UNIT]
             -L|--size Size[m|UNIT] VG|LV_new
           [ -l|--extents Number[PERCENT] ]
           [ -T|--thin ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a thin LV, first creating a thin pool for it,
       where the new thin pool is named in the first arg,
       or the new thin pool name is generated when the first
       arg is a VG name (variant, infers --type thin).

       lvcreate -T|--thin -V|--virtualsize Size[m|UNIT]
             -L|--size Size[m|UNIT] VG|LV_new
           [ -l|--extents Number[PERCENT] ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a thin LV, first creating a thin pool for it
       (infers --type thin).
       Create a sparse snapshot of a virtual origin LV
       (infers --type snapshot).
       Chooses --type thin or --type snapshot according to
       config setting sparse_segtype_default.

       lvcreate -L|--size Size[m|UNIT] -V|--virtualsize Size[m|UNIT] VG
           [ -l|--extents Number[PERCENT] ]
           [ -s|--snapshot ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --type snapshot ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --discards passdown|nopassdown|ignore ]
           [    --errorwhenfull y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a cache LV, first creating a new origin LV,
       then combining it with the existing cache pool named
       by the --cachepool arg (variant, infers --type cache).

       lvcreate -L|--size Size[m|UNIT] --cachepool LV_cachepool VG
           [ -l|--extents Number[PERCENT] ]
           [ -H|--cache ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --type cache ]
           [    --cachemode writethrough|writeback|passthrough ]
           [    --cachepolicy String ]
           [    --cachesettings String ]
           [    --cachemetadataformat auto|1|2 ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       Create a cache LV, first creating a new origin LV,
       then combining it with the existing cache pool named
       in the first arg (variant, also use --cachepool).

       lvcreate --type cache -L|--size Size[m|UNIT] LV_cachepool
           [ -l|--extents Number[PERCENT] ]
           [ -H|--cache ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [    --cachemode writethrough|writeback|passthrough ]
           [    --cachepolicy String ]
           [    --cachesettings String ]
           [    --cachemetadataformat auto|1|2 ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

       When LV is a cache pool, create a cache LV,
       first creating a new origin LV, then combining it with
       the existing cache pool named in the first arg
       (variant, infers --type cache, also use --cachepool).
       When LV is not a cache pool, convert the specified LV
       to type cache after creating a new cache pool LV to use
       (use lvconvert).

       lvcreate -H|--cache -L|--size Size[m|UNIT] LV
           [ -l|--extents Number[PERCENT] ]
           [ -c|--chunksize Size[k|UNIT] ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --cachemode writethrough|writeback|passthrough ]
           [    --cachepolicy String ]
           [    --cachesettings String ]
           [    --cachemetadataformat auto|1|2 ]
           [    --poolmetadatasize Size[m|UNIT] ]
           [    --poolmetadataspare y|n ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
       -

EXAMPLES

       Create  a  striped  LV with 3 stripes, a stripe size of 8KiB and a size of 100MiB.  The LV
       name is chosen by lvcreate.
       lvcreate -i 3 -I 8 -L 100m vg00

       Create a raid1 LV with two images, and a useable size of 500 MiB. This operation  requires
       two  devices,  one  for  each  mirror image. RAID metadata (superblock and bitmap) is also
       included on the two devices.
       lvcreate --type raid1 -m1 -L 500m -n mylv vg00

       Create a mirror LV with two images, and  a  useable  size  of  500  MiB.   This  operation
       requires three devices: two for mirror images and one for a disk log.
       lvcreate --type mirror -m1 -L 500m -n mylv vg00

       Create  a mirror LV with 2 images, and a useable size of 500 MiB.  This operation requires
       2 devices because the log is in memory.
       lvcreate --type mirror -m1 --mirrorlog core -L 500m -n mylv vg00

       Create a copy-on-write snapshot of an LV:
       lvcreate --snapshot --size 100m --name mysnap vg00/mylv

       Create a copy-on-write snapshot with a size sufficient for overwriting 20% of the size  of
       the original LV.
       lvcreate -s -l 20%ORIGIN -n mysnap vg00/mylv

       Create a sparse LV with 1TiB of virtual space, and actual space just under 100MiB.
       lvcreate --snapshot --virtualsize 1t --size 100m --name mylv vg00

       Create a linear LV with a usable size of 64MiB on specific physical extents.
       lvcreate -L 64m -n mylv vg00 /dev/sda:0-7 /dev/sdb:0-7

       Create  a  RAID5 LV with a usable size of 5GiB, 3 stripes, a stripe size of 64KiB, using a
       total of 4 devices (including one for parity).
       lvcreate --type raid5 -L 5G -i 3 -I 64 -n mylv vg00

       Create a RAID5 LV using all of the free space in the VG and spanning all the PVs in the VG
       (note  that the command will fail if there are more than 8 PVs in the VG, in which case -i
       7 must be used to get to the current maximum of 8 devices including parity for RaidLVs).
       lvcreate --config allocation/raid_stripe_all_devices=1
              --type raid5 -l 100%FREE -n mylv vg00

       Create RAID10 LV with a usable size of 5GiB, using 2 stripes, each on a two-image  mirror.
       (Note  that  the  -i and -m arguments behave differently: -i specifies the total number of
       stripes, but -m specifies the number of images in addition to the first image).
       lvcreate --type raid10 -L 5G -i 2 -m 1 -n mylv vg00

       Create a 1TiB thin LV, first creating a new thin pool for it,  where  the  thin  pool  has
       100MiB of space, uses 2 stripes, has a 64KiB stripe size, and 256KiB chunk size.
       lvcreate --type thin --name mylv --thinpool mypool
              -V 1t -L 100m -i 2 -I 64 -c 256 vg00

       Create  a  thin snapshot of a thin LV (the size option must not be used, otherwise a copy-
       on-write snapshot would be created).
       lvcreate --snapshot --name mysnap vg00/thinvol

       Create a thin snapshot of the read-only  inactive  LV  named  "origin"  which  becomes  an
       external origin for the thin snapshot LV.
       lvcreate --snapshot --name mysnap --thinpool mypool vg00/origin

       Create  a cache pool from a fast physical device. The cache pool can then be used to cache
       an LV.
       lvcreate --type cache-pool -L 1G -n my_cpool vg00 /dev/fast1

       Create a cache LV, first creating a  new  origin  LV  on  a  slow  physical  device,  then
       combining the new origin LV with an existing cache pool.
       lvcreate --type cache --cachepool my_cpool
              -L 100G -n mylv vg00 /dev/slow1

SEE ALSO

       lvm(8) lvm.conf(5) lvmconfig(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) 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) lvm2-activation-generator(8) blkdeactivate(8) lvmdump(8)

       dmeventd(8)   lvmetad(8)   lvmpolld(8)   lvmlockd(8)  lvmlockctl(8)  clvmd(8)  cmirrord(8)
       lvmdbusd(8)

       lvmsystemid(7) lvmreport(7) lvmraid(7) lvmthin(7) lvmcache(7)