Provided by: lvm2_2.03.16-2ubuntu1_amd64 bug

NAME

       vgchange — Change volume group attributes

SYNOPSIS

       vgchange option_args position_args
           [ option_args ]
           [ position_args ]

        -a|--activate y|n|ay
           --activationmode partial|degraded|complete
           --addtag Tag
           --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
           --autoactivation String
        -A|--autobackup y|n
           --commandprofile String
           --config String
        -d|--debug
           --deltag Tag
           --detachprofile
           --devices PV
           --devicesfile String
           --driverloaded y|n
        -f|--force
        -h|--help
        -K|--ignoreactivationskip
           --ignorelockingfailure
           --ignoremonitoring
           --journal String
           --lockopt String
           --lockstart
           --lockstop
           --locktype sanlock|dlm|none
        -l|--logicalvolume Number
           --longhelp
        -p|--maxphysicalvolumes Number
           --metadataprofile String
           --monitor y|n
           --nohints
           --nolocking
           --noudevsync
        -P|--partial
        -s|--physicalextentsize Size[m|UNIT]
           --poll y|n
           --profile String
           --pvmetadatacopies 0|1|2
        -q|--quiet
           --readonly
           --refresh
           --reportformat basic|json
        -x|--resizeable y|n
        -S|--select String
           --setautoactivation y|n
           --sysinit
           --systemid String
        -t|--test
        -u|--uuid
        -v|--verbose
           --version
           --[vg]metadatacopies all|unmanaged|Number
        -y|--yes

DESCRIPTION

       vgchange  changes  VG  attributes, changes LV activation in the kernel, and includes other
       utilities for VG maintenance.

USAGE

       Change a general VG attribute.
       For options listed in parentheses, any one is
       required, after which the others are optional.

       vgchange
           ( -l|--logicalvolume Number
             -p|--maxphysicalvolumes Number
             -u|--uuid
             -s|--physicalextentsize Size[m|UNIT]
             -x|--resizeable y|n
                --addtag Tag
                --deltag Tag
                --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
                --pvmetadatacopies 0|1|2
                --[vg]metadatacopies all|unmanaged|Number
                --profile String
                --detachprofile
                --metadataprofile String
                --setautoactivation y|n )
           [ -A|--autobackup y|n ]
           [ -S|--select String ]
           [ -f|--force ]
           [    --poll y|n ]
           [    --ignoremonitoring ]
           [    --noudevsync ]
           [    --reportformat basic|json ]
           [ COMMON_OPTIONS ]
           [ VG|Tag|Select ... ]

       —

       Start or stop monitoring LVs from dmeventd.

       vgchange --monitor y|n
           [ -A|--autobackup y|n ]
           [ -S|--select String ]
           [ -f|--force ]
           [    --sysinit ]
           [    --ignorelockingfailure ]
           [    --poll y|n ]
           [    --ignoremonitoring ]
           [    --noudevsync ]
           [    --reportformat basic|json ]
           [ COMMON_OPTIONS ]
           [ VG|Tag|Select ... ]

       —

       Start or stop processing LV conversions.

       vgchange --poll y|n
           [ -A|--autobackup y|n ]
           [ -S|--select String ]
           [ -f|--force ]
           [    --ignorelockingfailure ]
           [    --ignoremonitoring ]
           [    --noudevsync ]
           [    --reportformat basic|json ]
           [ COMMON_OPTIONS ]
           [ VG|Tag|Select ... ]

       —

       Activate or deactivate LVs.

       vgchange -a|--activate y|n|ay
           [ -K|--ignoreactivationskip ]
           [ -P|--partial ]
           [ -A|--autobackup y|n ]
           [ -S|--select String ]
           [ -f|--force ]
           [    --activationmode partial|degraded|complete ]
           [    --sysinit ]
           [    --readonly ]
           [    --ignorelockingfailure ]
           [    --monitor y|n ]
           [    --poll y|n ]
           [    --autoactivation String ]
           [    --ignoremonitoring ]
           [    --noudevsync ]
           [    --reportformat basic|json ]
           [ COMMON_OPTIONS ]
           [ VG|Tag|Select ... ]

       —

       Reactivate LVs using the latest metadata.

       vgchange --refresh
           [ -A|--autobackup y|n ]
           [ -S|--select String ]
           [ -f|--force ]
           [    --sysinit ]
           [    --ignorelockingfailure ]
           [    --poll y|n ]
           [    --ignoremonitoring ]
           [    --noudevsync ]
           [    --reportformat basic|json ]
           [ COMMON_OPTIONS ]
           [ VG|Tag|Select ... ]

       —

       Change the system ID of a VG.

       vgchange --systemid String VG
           [ COMMON_OPTIONS ]

       —

       Start the lockspace of a shared VG in lvmlockd.

       vgchange --lockstart
           [ -S|--select String ]
           [ COMMON_OPTIONS ]
           [ VG|Tag|Select ... ]

       —

       Stop the lockspace of a shared VG in lvmlockd.

       vgchange --lockstop
           [ -S|--select String ]
           [ COMMON_OPTIONS ]
           [ VG|Tag|Select ... ]

       —

       Change the lock type for a shared VG.

       vgchange --locktype sanlock|dlm|none VG
           [ COMMON_OPTIONS ]

       —

       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

       -a|--activate y|n|ay
              Change the active state of LVs.  An active LV can be used through a  block  device,
              allowing data on the LV to be accessed.  y makes LVs active, or available.  n makes
              LVs inactive, or unavailable.  The block device for the LV is added or removed from
              the  system  using device-mapper in the kernel.  A symbolic link /dev/VGName/LVName
              pointing to the device node is also added/removed.  All software and scripts should
              access  the  device  through  the symbolic link and present this as the name of the
              device.  The location and name of the underlying device  node  may  depend  on  the
              distribution,   configuration  (e.g.  udev),  or  release  version.   ay  specifies
              autoactivation, which is used by system-generated activation commands.  By default,
              LVs  are  autoactivated.   An  autoactivation  property can be set on a VG or LV to
              disable  autoactivation,  see  --setautoactivation  y|n  in   vgchange,   lvchange,
              vgcreate,  and lvcreate.  Display the property with vgs or lvs "-o autoactivation".
              The lvm.conf(5) auto_activation_volume_list includes  names  of  VGs  or  LVs  that
              should  be  autoactivated,  and  anything  not  listed  is not autoactivated.  When
              auto_activation_volume_list is undefined (the  default),  it  has  no  effect.   If
              auto_activation_volume_list  is defined and empty, no LVs are autoactivated.  Items
              included  by  auto_activation_volume_list  will  not  be   autoactivated   if   the
              autoactivation  property  has  been disabled.  See lvmlockd(8) for more information
              about activation options ey and sy for shared VGs.

       --activationmode partial|degraded|complete
              Determines if LV activation is allowed when PVs are  missing,  e.g.  because  of  a
              device  failure.  complete only allows LVs with no missing PVs to be activated, and
              is the most restrictive mode.  degraded allows RAID LVs  with  missing  PVs  to  be
              activated.   (This  does  not  include  the  "mirror"  type,  see "raid1" instead.)
              partial allows any LV with missing PVs to be activated, and should only be used for
              recovery  or repair.  For default, see lvm.conf(5) activation_mode.  See lvmraid(7)
              for more information.

       --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 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.

       --autoactivation String
              Specify  if autoactivation is being used from an event.  This allows the command to
              apply settings that are specific to  event  activation,  such  as  device  scanning
              optimizations using pvs_online files created by event-based pvscans.

       -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).

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

       --detachprofile
              Detaches  a metadata profile from a VG or LV.  See lvm.conf(5) for more information
              about profiles.

       --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.

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

       -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.

       --ignorelockingfailure
              Allows a command to continue  with  read-only  metadata  operations  after  locking
              failures.

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

       --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.

       --lockstart
              Start the lockspace of a shared VG in lvmlockd.  lvmlockd locks  becomes  available
              for the VG, allowing LVM to use the VG.  See lvmlockd(8) for more information.

       --lockstop
              Stop  the  lockspace of a shared VG in lvmlockd.  lvmlockd locks become unavailable
              for  the  VG,  preventing  LVM  from  using  the  VG.   See  lvmlockd(8)  for  more
              information.

       --locktype sanlock|dlm|none
              Change  the  VG  lock  type  to or from a shared lock type used with lvmlockd.  See
              lvmlockd(8) for more information.

       -l|--logicalvolume Number
              Sets the maximum number of LVs allowed in a VG.

       --longhelp
              Display long help text.

       -p|--maxphysicalvolumes Number
              Sets the maximum number of PVs that can belong to the VG.  The value 0 removes  any
              limitation.   For  large  numbers  of PVs, also see options --pvmetadatacopies, and
              --vgmetadatacopies for improving performance.

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

       --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.

       --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.

       --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|--partial
              Commands  will  do  their  best  to  activate LVs with missing PV extents.  Missing
              extents  may  be  replaced  with  error  or  zero   segments   according   to   the
              missing_stripe_filler setting.  Metadata may not be changed with this option.

       -s|--physicalextentsize Size[m|UNIT]
              Sets  the  physical extent size of PVs in the VG.  The value must be either a power
              of 2 of at least 1 sector (where the sector size is the largest sector size of  the
              PVs  currently  used in the VG), or at least 128KiB.  Once this value has been set,
              it is difficult to change without recreating the VG, unless no extents need moving.
              Before  increasing  the  physical  extent  size,  you  might  need to use lvresize,
              pvresize and/or pvmove so that everything fits. For example, every contiguous range
              of extents used in a LV must start and end on an extent boundary.

       --poll y|n
              When   yes,   start   the  background  transformation  of  an  LV.   An  incomplete
              transformation, e.g. pvmove or lvconvert interrupted by reboot  or  crash,  can  be
              restarted   from   the   last  checkpoint  with  --poll  y.   When  no,  background
              transformation of an LV will not occur, and the transformation will  not  complete.
              It may not be appropriate to immediately poll an LV after activation, in which case
              --poll n can be used to defer polling until a later --poll y command.

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

       --pvmetadatacopies 0|1|2
              The number of metadata areas to set aside on a PV for storing VG metadata.  When 2,
              one  copy  of the VG metadata is stored at the front of the PV and a second copy is
              stored at the end.  When 1, one copy of the VG metadata is stored at the  front  of
              the PV.  When 0, no copies of the VG metadata are stored on the given PV.  This may
              be useful in VGs containing many PVs (this places limitations on the ability to use
              vgsplit later.)

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

       --readonly
              Run the command in a special  read-only  mode  which  will  read  on-disk  metadata
              without needing to take any locks. This can be used to peek inside metadata used by
              a virtual machine image while the virtual machine is running. No  attempt  will  be
              made  to communicate with the device-mapper kernel driver, so this option is unable
              to report whether or not LVs are actually in use.

       --refresh
              If the LV is active,  reload  its  metadata.   This  is  not  necessary  in  normal
              operation, but may be useful if something has gone wrong, or if some form of manual
              LV sharing is being used.

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

       -x|--resizeable y|n
              Enables  or  disables  the  addition  or  removal  of  PVs   to/from   a   VG   (by
              vgextend/vgreduce).

       -S|--select String
              Select  objects  for  processing  and  reporting  based on specified criteria.  The
              criteria syntax is described by --select  help  and  lvmreport(7).   For  reporting
              commands,  one  row  is  displayed  for  each  object  matching  the criteria.  See
              --options help for selectable  object  fields.   Rows  can  be  displayed  with  an
              additional  "selected"  field  (-o  selected)  showing  1  if  the  row matches the
              selection and 0 otherwise.  For non-reporting commands which process LVM  entities,
              the selection is used to choose items to process.

       --setautoactivation y|n
              Set  the  autoactivation  property on a VG or LV.  Display the property with vgs or
              lvs "-o autoactivation".  When the autoactivation property is disabled, the  VG  or
              LV  will not be activated by a command doing autoactivation (vgchange, lvchange, or
              pvscan using -aay.)  If autoactivation  is  disabled  on  a  VG,  no  LVs  will  be
              autoactivated  in  that  VG,  and the LV autoactivation property has no effect.  If
              autoactivation is enabled on a VG, autoactivation can be  disabled  for  individual
              LVs.

       --sysinit
              Indicates  that vgchange/lvchange is being invoked from early system initialisation
              scripts (e.g. rc.sysinit or an initrd), before writable filesystems are  available.
              As such, some functionality needs to be disabled and this option acts as a shortcut
              which selects an appropriate set of options. Currently, this is equivalent to using
              --ignorelockingfailure,   --ignoremonitoring,   --poll   n,  and  setting  env  var
              LVM_SUPPRESS_LOCKING_FAILURE_MESSAGES.  vgchange/lvchange skip autoactivation,  and
              defer to pvscan autoactivation.

       --systemid String
              Changes the system ID of the VG.  Using this option requires caution because the VG
              may become foreign to the host running the command,  leaving  the  host  unable  to
              access it.  See lvmsystemid(7) for more information.

       -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.

       -u|--uuid
              Generate new random UUID for specified VGs.

       -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.

       --[vg]metadatacopies all|unmanaged|Number
              Number  of  copies  of  the  VG  metadata that are kept.  VG metadata is kept in VG
              metadata areas on PVs in the VG, i.e. reserved space at the start and/or end of the
              PVs.   Keeping  a copy of the VG metadata on every PV can reduce performance in VGs
              containing a large number of PVs.  When this number is set to a non-zero value, LVM
              will  automatically choose PVs on which to store metadata, using the metadataignore
              flags on PVs to achieve the specified number.  The number can also be replaced with
              special  string  values:  unmanaged  causes  LVM to not automatically manage the PV
              metadataignore flags.  all causes LVM to first clear the  metadataignore  flags  on
              all PVs, and then to become unmanaged.

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

VARIABLES

       VG     Volume Group name.  See lvm(8) for valid names.

       Tag    Tag name.  See lvm(8) for information about tag names and using tags in place of  a
              VG, LV or PV.

       Select Select  indicates  that  a  required  positional  parameter  can  be omitted if the
              --select option is used.  No arg appears in this position.

       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.

NOTES

       If  vgchange  recognizes COW snapshot LVs that were dropped because they ran out of space,
       it displays a message informing the administrator that the snapshots should be removed.

EXAMPLES

       Activate all LVs in all VGs on all existing devices.
       vgchange -a y

       Change the maximum number of LVs for an inactive VG.
       vgchange -l 128 vg00

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), lvmraid(7), lvmthin(7), lvmcache(7)