Provided by: lvm2_2.03.22-1ubuntu2_amd64 bug

NAME

       lvextend — Add space to a logical volume

SYNOPSIS

       lvextend option_args position_args
           [ option_args ]
           [ position_args ]

           --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
        -A|--autobackup y|n
           --commandprofile String
           --config String
        -d|--debug
           --devices PV
           --devicesfile String
           --driverloaded y|n
        -l|--extents [+]Number[PERCENT]
        -f|--force
           --fs String
           --fsmode String
        -h|--help
           --journal String
           --lockopt String
           --longhelp
        -m|--mirrors Number
        -n|--nofsck
           --nohints
           --nolocking
           --nosync
           --noudevsync
           --poolmetadatasize [+]Size[m|UNIT]
           --profile String
        -q|--quiet
           --reportformat basic|json|json_std
        -r|--resizefs
        -L|--size [+]Size[m|UNIT]
        -i|--stripes Number
        -I|--stripesize Size[k|UNIT]
        -t|--test
           --type linear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|vdo-pool|cache|
       cache-pool|writecache
           --usepolicies
        -v|--verbose
           --version
        -y|--yes

DESCRIPTION

       lvextend extends the size of an LV. This requires allocating logical extents from the VG's
       free  physical  extents.  If the extension adds a new LV segment, the new segment will use
       the existing segment type of the LV.

       Extending a copy-on-write snapshot LV adds space for COW blocks.

       Use lvconvert(8) to change the number of data images in a RAID or mirrored LV.

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

USAGE

       Extend an LV by a specified size.

       lvextend -L|--size [+]Size[m|UNIT] LV
           [ -l|--extents [+]Number[PERCENT] ]
           [ -r|--resizefs ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --poolmetadatasize [+]Size[m|UNIT] ]
           [    --fs String ]
           [    --fsmode String ]
           [ COMMON_OPTIONS ]
           [ PV ... ]

       —

       Extend an LV by specified PV extents.

       lvextend LV PV ...
           [ -r|--resizefs ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --fs String ]
           [    --fsmode String ]
           [ COMMON_OPTIONS ]

       —

       Extend a pool metadata SubLV by a specified size.

       lvextend --poolmetadatasize [+]Size[m|UNIT] LV1
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]

           LV1 types: linear thinpool

       —

       Extend an LV according to a predefined policy.

       lvextend --usepolicies LV1
           [ -r|--resizefs ]
           [    --fs String ]
           [    --fsmode String ]
           [ COMMON_OPTIONS ]
           [ PV ... ]

           LV1 types: snapshot thinpool vdopool

       —

       Common options for command:
           [ -A|--autobackup y|n ]
           [ -f|--force ]
           [ -m|--mirrors Number ]
           [ -n|--nofsck ]
           [    --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit ]
           [    --nosync ]
           [    --noudevsync ]
           [    --reportformat basic|json|json_std ]
           [    --type linear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|vdo-pool|cache|
           cache-pool|writecache ]

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

OPTIONS

       --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
              Determines the allocation policy when a command needs to allocate Physical  Extents
              (PEs)  from  the  VG.  Each VG and LV has an allocation policy which can be changed
              with vgchange/lvchange, or overridden on the command line.  normal  applies  common
              sense  rules  such as not placing parallel stripes on the same PV.  inherit applies
              the VG policy to an LV.  contiguous requires new PEs be placed adjacent to existing
              PEs.  cling places new PEs on the same PV as existing PEs in the same stripe of the
              LV.  If there are sufficient PEs for an allocation, but normal does not  use  them,
              anywhere  will use them even if it reduces performance, e.g. by placing two stripes
              on the same PV.  Optional positional PV args on the command line can also  be  used
              to  limit  which  PVs  the  command  will  use for allocation.  See lvm(8) for more
              information about allocation.

       -A|--autobackup y|n
              Specifies if metadata should be backed up automatically after a  change.   Enabling
              this is strongly advised! See vgcfgbackup(8) for more information.

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

       --config String
              Config settings for the command. These override lvm.conf(5) settings.   The  String
              arg  uses  the  same  format  as lvm.conf(5), or may use section/field syntax.  See
              lvm.conf(5) for more information about config.

       -d|--debug ...
              Set debug level. Repeat from 1 to 6 times to increase the detail of  messages  sent
              to the log file and/or syslog (if configured).

       --devices PV
              Restricts  the devices that are visible and accessible to the command.  Devices not
              listed will appear to be missing. This option can be repeated, or accepts  a  comma
              separated list of devices. This overrides the devices file.

       --devicesfile String
              A   file   listing   devices   that  LVM  should  use.   The  file  must  exist  in
              /etc/lvm/devices/ and is managed with the lvmdevices(8)  command.   This  overrides
              the lvm.conf(5) devices/devicesfile and devices/use_devicesfile settings.

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

       -l|--extents [+]Number[PERCENT]
              Specifies the new size of the LV in logical  extents.   The  --size  and  --extents
              options  are  alternate  methods  of specifying size.  The total number of physical
              extents used will be greater when redundant data is needed  for  RAID  levels.   An
              alternate syntax allows the size to be determined indirectly as a percentage of the
              size of a related VG, LV, or set of PVs. The suffix %VG denotes the total  size  of
              the  VG,  the  suffix %FREE the remaining free space in the VG, and the suffix %PVS
              the free space in the specified PVs.  For a snapshot, the size can be expressed  as
              a percentage of the total size of the origin LV with the suffix %ORIGIN (100%ORIGIN
              provides space for the whole origin).  When expressed as  a  percentage,  the  size
              defines an upper limit for the number of logical extents in the new LV. The precise
              number of logical extents in the new LV is not determined  until  the  command  has
              completed.  When the plus + or minus - prefix is used, the value is not an absolute
              size, but is relative and added or subtracted from the current size.

       -f|--force ...
              Override various checks, confirmations and protections.  Use with extreme caution.

       --fs String
              Control file system resizing when resizing an LV.  checksize: Check the fs size and
              reduce  the  LV if the fs is not using the reduced space (fs reduce is not needed.)
              If the reduced space is used by the fs, then do not resize the fs or LV, and return
              an  error.   (checksize  only  applies when reducing, and does nothing for extend.)
              resize: Resize the fs by calling the fs-specific resize  command.   This  may  also
              include  mounting,  unmounting,  or  running fsck. See --fsmode to control mounting
              behavior, and --nofsck to disable  fsck.   resize_fsadm:  Use  the  old  method  of
              calling  fsadm to handle the fs (deprecated.) Warning: this option does not prevent
              lvreduce from destroying file systems that are unmounted (or mounted if prompts are
              skipped.)   ignore:  Resize  the LV without checking for or handling a file system.
              Warning: using ignore when reducing the LV size may destroy the file system.

       --fsmode String
              Control file system mounting behavior for fs resize.  manage: Mount or unmount  the
              fs  as  needed to resize the fs, and attempt to restore the original mount state at
              the end.  nochange: Do not mount or unmount the fs. If mounting  or  unmounting  is
              required  to  resize  the  fs,  then  do  not  resize the fs or the LV and fail the
              command.  offline: Unmount the fs if it is mounted, and resize the fs while  it  is
              unmounted.  If  mounting is required to resize the fs, then do not resize the fs or
              the LV and fail the command.

       -h|--help
              Display help text.

       --journal String
              Record information in the systemd journal.  This  information  is  in  addition  to
              information   enabled   by  the  lvm.conf  log/journal  setting.   command:  record
              information about the command.  output: record the default command output.   debug:
              record full command debugging.

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

       --longhelp
              Display long help text.

       -m|--mirrors Number
              Not used.

       -n|--nofsck
              Do not perform fsck when resizing the file system with --resizefs.

       --nohints
              Do not use the hints file to locate devices  for  PVs.  A  command  may  read  more
              devices  to  find  PVs  when  hints  are  not  used. The command will still perform
              standard hint file invalidation where appropriate.

       --nolocking
              Disable locking. Use  with  caution,  concurrent  commands  may  produce  incorrect
              results.

       --nosync
              Causes  the  creation of mirror, raid1, raid4, raid5 and raid10 to skip the initial
              synchronization. In case of mirror, raid1 and raid10, any data  written  afterwards
              will  be  mirrored,  but the original contents will not be copied. In case of raid4
              and raid5, no parity blocks will be written, though  any  data  written  afterwards
              will  cause  parity blocks to be stored.  This is useful for skipping a potentially
              long and resource intensive initial sync of an empty  mirror/raid1/raid4/raid5  and
              raid10  LV.   This  option  is  not valid for raid6, because raid6 relies on proper
              parity (P and Q Syndromes) being created during initial synchronization in order to
              reconstruct  proper  user date in case of device failures.  raid0 and raid0_meta do
              not provide any data copies or parity support  and  thus  do  not  support  initial
              synchronization.

       --noudevsync
              Disables  udev  synchronization.  The  process  will not wait for notification from
              udev. It will  continue  irrespective  of  any  possible  udev  processing  in  the
              background.  Only  use  this  if  udev  is not running or has rules that ignore the
              devices LVM creates.

       --poolmetadatasize [+]Size[m|UNIT]
              Specifies the new size of the pool metadata LV.  The plus prefix + can be used,  in
              which case the value is added to the current size.

       --profile String
              An alias for --commandprofile or --metadataprofile, depending on the command.

       -q|--quiet ...
              Suppress  output and log messages. Overrides --debug and --verbose.  Repeat once to
              also suppress any prompts with answer 'no'.

       --reportformat basic|json|json_std
              Overrides current output format for  reports  which  is  defined  globally  by  the
              report/output_format  setting  in  lvm.conf(5).   basic is the original format with
              columns and rows.  If there is more than one report per  command,  each  report  is
              prefixed  with  the  report name for identification. json produces report output in
              JSON format. json_std produces report output in JSON format which is more compliant
              with JSON standard.  See lvmreport(7) for more information.

       -r|--resizefs
              Resize  the  fs  using  the  fs-specific  resize  command.   May  include mounting,
              unmounting, or running  fsck.  See  --fsmode  to  control  mounting  behavior,  and
              --nofsck  to  disable  fsck. See --fs for more options (--resizefs is equivalent to
              --fs resize.)

       -L|--size [+]Size[m|UNIT]
              Specifies the new size of the LV.  The --size and --extents options  are  alternate
              methods  of  specifying  size.   The  total number of physical extents used will be
              greater when redundant data is needed for RAID levels.  When the plus + or minus  -
              prefix  is  used,  the  value is not an absolute size, but is relative and added or
              subtracted from the current size.

       -i|--stripes Number
              Specifies the number of stripes in  a  striped  LV.  This  is  the  number  of  PVs
              (devices)  that  a striped LV is spread across. Data that appears sequential in the
              LV  is  spread  across  multiple  devices  in  units  of  the  stripe   size   (see
              --stripesize).  This  does not change existing allocated space, but only applies to
              space being allocated by the command.  When creating a RAID 4/5/6 LV,  this  number
              does not include the extra devices that are required for parity. The largest number
              depends on the RAID type (raid0: 64, raid10: 32, raid4/5: 63, raid6: 62), and  when
              unspecified, the default depends on the RAID type (raid0: 2, raid10: 2, raid4/5: 3,
              raid6: 5.)  To stripe a new raid LV across all  PVs  by  default,  see  lvm.conf(5)
              allocation/raid_stripe_all_devices.

       -I|--stripesize Size[k|UNIT]
              The  amount  of  data  that is written to one device before moving to the next in a
              striped LV.

       -t|--test
              Run in test mode. Commands will  not  update  metadata.   This  is  implemented  by
              disabling  all  metadata  writing but nevertheless returning success to the calling
              function. This may lead to unusual error messages in multi-stage  operations  if  a
              tool relies on reading back metadata it believes has changed but hasn't.

       --type linear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|vdo-pool|cache|cache-pool|
              writecache
              The LV type, also known as "segment type" or "segtype".  See usage descriptions for
              the  specific  ways  to use these types.  For more information about redundancy and
              performance  (raid<N>,  mirror,  striped,  linear)  see   lvmraid(7).    For   thin
              provisioning  (thin,  thin-pool)  see  lvmthin(7).  For performance caching (cache,
              cache-pool) see lvmcache(7).  For  copy-on-write  snapshots  (snapshot)  see  usage
              definitions.   For VDO (vdo) see lvmvdo(7).  Several commands omit an explicit type
              option because  the  type  is  inferred  from  other  options  or  shortcuts  (e.g.
              --stripes,  --mirrors,  --snapshot,  --virtualsize,  --thin,  --cache, --vdo).  Use
              inferred types with care because it can lead to unexpected results.

       --usepolicies
              Perform an operation according  to  the  policy  configured  in  lvm.conf(5)  or  a
              profile.

       -v|--verbose ...
              Set verbose level. Repeat from 1 to 4 times to increase the detail of messages sent
              to stdout and stderr.

       --version
              Display version information.

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

VARIABLES

       LV     Logical  Volume  name.  See lvm(8) for valid names.  An LV positional arg generally
              includes the VG name and LV name, e.g. VG/LV.  LV1 indicates the  LV  must  have  a
              specific  type,  where  the  accepted LV types are listed. (raid represents raid<N>
              type).

       PV     Physical Volume name, a device path under /dev.   For  commands  managing  physical
              extents,  a  PV  positional  arg  generally accepts a suffix indicating a range (or
              multiple ranges) of physical extents (PEs).  When  the  first  PE  is  omitted,  it
              defaults to the start of the device, and when the last PE is omitted it defaults to
              end.  Start and end  range  (inclusive):  PV[:PE-PE]...   Start  and  length  range
              (counting from 0): PV[:PE+PE]...

       String See the option description for information about the string content.

       Size[UNIT]
              Size  is  an  input  number  that accepts an optional unit.  Input units are always
              treated as base two values, regardless of capitalization, e.g.  'k'  and  'K'  both
              refer  to  1024.  The default input unit is specified by letter, followed by |UNIT.
              UNIT represents other possible input units: b|B is bytes, s|S  is  sectors  of  512
              bytes,  k|K  is  KiB,  m|M  is MiB, g|G is GiB, t|T is TiB, p|P is PiB, e|E is EiB.
              (This should not be confused with the output control --units, where capital letters
              mean multiple of 1000.)

ENVIRONMENT VARIABLES

       See  lvm(8)  for  information  about  environment  variables  used  by  lvm.  For example,
       LVM_VG_NAME can generally be substituted for a required VG parameter.

EXAMPLES

       Extend the size of an LV by 54MiB, using a specific PV.
       lvextend -L +54 vg01/lvol10 /dev/sdk3

       Extend the size of an LV by the amount of free space on PV /dev/sdk3. This  is  equivalent
       to specifying "-l +100%PVS" on the command line.
       lvextend vg01/lvol01 /dev/sdk3

       Extend an LV by 16MiB using specific physical extents.
       lvextend -L+16m vg01/lvol01 /dev/sda:8-9 /dev/sdb:8-9

       Extend an LV to use all remaining free space in volume group and all resize its filesystem
       with fsadm(8).
       lvextend -l+100%FREE -r vg01/lvol01

SEE ALSO

       lvm(8), lvm.conf(5), lvmconfig(8), lvmdevices(8),

       pvchange(8), pvck(8), pvcreate(8), pvdisplay(8), pvmove(8), pvremove(8), pvresize(8),
       pvs(8), pvscan(8),

       vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8), vgcreate(8), vgconvert(8),
       vgdisplay(8), vgexport(8), vgextend(8), vgimport(8), vgimportclone(8), vgimportdevices(8),
       vgmerge(8), vgmknodes(8), vgreduce(8), vgremove(8), vgrename(8), vgs(8), vgscan(8),
       vgsplit(8),

       lvcreate(8), lvchange(8), lvconvert(8), lvdisplay(8), lvextend(8), lvreduce(8),
       lvremove(8), lvrename(8), lvresize(8), lvs(8), lvscan(8),

       lvm-fullreport(8), lvm-lvpoll(8), blkdeactivate(8), lvmdump(8),

       dmeventd(8), lvmpolld(8), lvmlockd(8), lvmlockctl(8), cmirrord(8), lvmdbusd(8), fsadm(8),

       lvmsystemid(7), lvmreport(7), lvmcache(7), lvmraid(7), lvmthin(7), lvmvdo(7),
       lvmautoactivation(7)