lvcreate(8) - phpMan

LVCREATE(8)                 System Manager's Manual                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
           --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
           --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
           --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|mir-
       ror|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  combina-
       tion  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  speci-
       fied,  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 ]
           [    --lockopt String ]
           [    --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 snap-
              shots 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 clus-
              tered 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 allo-
              cate 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 infor-
              mation 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 com-
              plete.  writeback considers a write complete as soon as it is
              stored in the cache pool.  writethough considers a write com-
              plete 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 associ-
              ated 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 informa-
              tion.
       --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 meta-
              data.  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 meta-
              data size within 128MiB, if the pool metadata size is not speci-
              fied.  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 set-
              tings.  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 princi-
              ple.  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.
       --lockopt String
              Used to pass options for special cases to lvmlockd.  See lvm-
              lockd(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.  Set-
              ting 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.  Set-
              ting 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 sepa-
              rate device from the data being mirrored.  core is not persis-
              tent; 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 origi-
              nal 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_seg-
              type_default to configure the default types.  See the --nosync
              option for avoiding initial image synchronization.  See lvm-
              raid(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 auto-
              mated 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 use-
              ful for skipping a potentially long and resource intensive ini-
              tial 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 --ver-
              bose.  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 automati-
              cally.  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 com-
              mand.  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 ori-
              gin 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 (shrink-
              ing 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 automati-
              cally 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 alloca-
              tion/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|mir-
              ror|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 snap-
              shots (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 cre-
              ated using the zero target, and the LV has the suffix _vorigin.
              Snapshots are less efficient than thin provisioning when creat-
              ing 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 signa-
              tures 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  posi-
              tional  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 con-
              tent.
       Size[UNIT]
              Size is an input number that accepts an  optional  unit.   Input
              units are always treated as base two values, regardless of capi-
              talization, e.g. 'k' and 'K' both refer to  1024.   The  default
              input unit is specified by letter, followed by |UNIT.  UNIT rep-
              resents 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 meta-
       data (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 differ-
       ently: -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)  vgcon-
       vert(8)  vgdisplay(8)  vgexport(8)  vgextend(8)  vgimport(8)  vgimport-
       clone(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) lvre-
       duce(8) lvremove(8) lvrename(8) lvresize(8) lvs(8) lvscan(8)
       lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8) blkdeacti-
       vate(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)

Red Hat, Inc.      LVM TOOLS 2.02.187(2)-RHEL7 (2020-03-24)        LVCREATE(8)