LVCREATE(8)    (LVM TOOLS 2.03.11(2) (2021-01-08))    LVCREATE(8)

     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
              --cachedevice PV
              --cachemetadataformat auto|1|2
              --cachemode writethrough|writeback|passthrough
              --cachepolicy String
              --cachepool LV
              --cachesettings String
              --cachesize Size[m|UNIT]
              --cachevol LV
           -c|--chunksize Size[k|UNIT]
              --commandprofile String
              --compression y|n
              --config String
           -C|--contiguous y|n
           -d|--debug
              --deduplication y|n
              --discards passdown|nopassdown|ignore
              --driverloaded y|n
              --errorwhenfull y|n
           -l|--extents Number[PERCENT]
           -h|--help
           -K|--ignoreactivationskip
              --ignoremonitoring
              --lockopt String
              --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
              --nolocking
              --nosync
              --noudevsync

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           -p|--permission rw|r
           -M|--persistent y|n
              --poolmetadatasize Size[m|UNIT]
              --poolmetadataspare y|n
              --profile String
           -q|--quiet
              --raidintegrity y|n
              --raidintegrityblocksize Number
              --raidintegritymode String
           -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|vdo|thin-pool|cache-pool|vdo-pool
              --vdo
              --vdopool LV
           -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.

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          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.

          VDO LVs are also provisioned volumes from a  VDO  pool,  and
          are  created with a virtual size rather than a physical size
          (see lvmvdo(7)).

        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.

          In the usage section below, when creating  a  pool  and  the
          name  is  omitted the new LV pool name is generated with the
          "vpool" for vdo-pools   for  prefix  and  a  unique  numeric
          suffix.

          Pool name can be  specified  together  with  VG  name  i.e.:
          vg00/mythinpool.

     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 ... ]
          -

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          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] ]
              [    --raidintegrity y|n ]
              [    --raidintegritymode String ]
              [    --raidintegrityblocksize Number ]
              [ 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 ]

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              [ 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 ]

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              [    --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 LV that returns VDO when used.

          lvcreate --type vdo -L|--size Size[m|UNIT] VG
              [ -l|--extents Number[PERCENT] ]
              [ -V|--virtualsize Size[m|UNIT] ]
              [ -i|--stripes Number ]
              [ -I|--stripesize Size[k|UNIT] ]
              [    --vdo ]
              [    --vdopool LV_new ]
              [    --compression y|n ]
              [    --deduplication 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.

          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 new LV, then attach the specified cachepool
          which converts the new LV to type cache.

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          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 ... ]
          -

          Create a new LV, then attach the specified cachevol
          which converts the new LV to type cache.

          lvcreate --type cache -L|--size Size[m|UNIT]
                --cachevol LV VG
              [ -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 ]
              [ COMMON_OPTIONS ]
              [ PV ... ]
          -

          Create a new LV, then attach a cachevol created from
          the specified cache device, which converts the
          new LV to type cache.

          lvcreate --type cache -L|--size Size[m|UNIT]
                --cachedevice PV VG
              [ -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 ]
              [    --cachesize Size[m|UNIT] ]
              [ COMMON_OPTIONS ]
              [ PV ... ]
          -

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          Create a new LV, then attach the specified cachevol
          which converts the new LV to type writecache.

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

          Create a new LV, then attach a cachevol created from
          the specified cache device, which converts the
          new LV to type writecache.

          lvcreate --type writecache -L|--size Size[m|UNIT]
                --cachedevice PV VG
              [ -l|--extents Number[PERCENT] ]
              [ -i|--stripes Number ]
              [ -I|--stripesize Size[k|UNIT] ]
              [    --cachesize Size[m|UNIT] ]
              [    --cachesettings String ]
              [ 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 ]

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

          --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

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               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.

          --cachedevice PV
               The name of a device to use for a cache.

          --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.

          --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.

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          --cachesize Size[m|UNIT]
               The size of cache to use.

          --cachevol LV
               The name of a cache volume.

          -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.

          --compression y|n
               Controls whether compression is enabled or disable for
               VDO volume.  See lvmvdo(7) for more information about
               VDO usage.

          --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).

          --deduplication y|n
               Controls whether deduplication is enabled or disable
               for VDO volume.  See lvmvdo(7) for more information
               about VDO usage.

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          --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

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

          --lockopt String
               Used to pass options for special cases to lvmlockd.
               See lvmlockd(8) for more information.

          --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.

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               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.

          --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.

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

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               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'.

          --raidintegrity y|n
               Enable or disable data integrity checksums for raid
               images.

          --raidintegrityblocksize Number
               The block size to use for dm-integrity on raid images.
               The integrity block size should usually match the
               device logical block size, or the file system block
               size.  It may be less than the file system block size,
               but not less than the device logical block size.
               Possible values: 512, 1024, 2048, 4096.

          --raidintegritymode String
               Use a journal (default) or bitmap for keeping integrity
               checksums consistent in case of a crash. The bitmap
               areas are recalculated after a crash, so corruption in
               those areas would not be detected. A journal does not
               have this problem.  The journal mode doubles writes to
               storage, but can improve performance for scattered
               writes packed into a single journal write.  bitmap mode
               can in theory achieve full write throughput of the
               device, but would not benefit from the potential
               scattered write optimization.

          -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.

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          -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

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               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|vdo|thin-pool|cache-pool|vdo-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

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               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.

          --vdo
               Specifies the command is handling VDO LV.  See --type
               vdo.  See lvmvdo(7) for more information about VDO
               usage.

          --vdopool LV
               The name of a VDO pool LV.  See lvmvdo(7) for more
               information about VDO usage.

          -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

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               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.  For thin pools, this controls zeroing of
               provisioned blocks.  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,

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               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 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.

     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).

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          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] ]

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              [ -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 ]

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              [ -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).

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

          Create a VDO LV with VDO pool.

          lvcreate --vdo -L|--size Size[m|UNIT] VG
              [ -l|--extents Number[PERCENT] ]
              [ -V|--virtualsize Size[m|UNIT] ]
              [ -i|--stripes Number ]
              [ -I|--stripesize Size[k|UNIT] ]
              [    --vdopool LV_new ]
              [    --compression y|n ]
              [    --deduplication y|n ]
              [ COMMON_OPTIONS ]
              [ PV ... ]
          -

          Create a VDO LV with VDO pool.

          lvcreate --vdopool LV_new -L|--size Size[m|UNIT] VG
              [ -l|--extents Number[PERCENT] ]
              [ -V|--virtualsize Size[m|UNIT] ]
              [ -i|--stripes Number ]
              [ -I|--stripesize Size[k|UNIT] ]
              [    --vdo ]
              [    --type vdo ]
              [    --compression y|n ]
              [    --deduplication 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
              [ -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 ]

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              [ 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] ]

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              [ -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 new LV, then attach the specified cachepool
          which converts the new LV to type cache
          (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 ... ]
          -

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          Create a new LV, then attach the specified cachepool
          which converts the new LV to type cache.
          (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 the LV arg is a cachepool, then create a new LV and
          attach the cachepool arg to it.
          (variant, use --type cache and --cachepool.)
          When the LV arg is  not  a  cachepool,  then  create  a  new
          cachepool
          and attach it to the LV arg (alternative, 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

          Create a raid1 LV with two images, and a useable size of 500
          MiB.  This operation requires two devices, one for each mir-
          ror image. RAID metadata (superblock  and  bitmap)  is  also
          included on the two devices.

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          lvcreate --type raid1 -m1 -L 500m

          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

          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

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

          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

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

          Create a linear LV with a usable size of 64MiB  on  specific
          physical extents.
          lvcreate -L 64m -n mylv vg00

          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

          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

          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 num-
          ber  of  stripes,  but  -m specifies the number of images in
          addition to the first image).
          lvcreate --type raid10 -L 5G -i

          Create a 1TiB thin LV mythin, with 256GiB thinpool tpool0 in
          vg00.
          lvcreate --T --size 256G --name mythin

          Create a 1TiB thin LV, first creating a new  thin  pool  for

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          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
               -V 1t -L 100m -i 2

          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 snap-
          shot LV.
          lvcreate --snapshot --name mysnap --thinpool mypool

          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

          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

          Create a VDO LV vdo0 with VDOPoolLV size of 10GiB  and  name
          vpool1.
          lvcreate --vdo --size 10G --name vdo0

     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)    lvmpolld(8)     lvmlockd(8)     lvmlockctl(8)
          cmirrord(8) lvmdbusd(8)

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

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          lvmcache(7)

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