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VGCHANGE(8)							   VGCHANGE(8)

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
	-A|--autobackup y|n
	-c|--clustered y|n
	   --commandprofile String
	   --config String
	-d|--debug
	   --deltag Tag
	   --detachprofile
	   --driverloaded y|n
	-f|--force
	-h|--help
	-K|--ignoreactivationskip
	   --ignorelockingfailure
	   --ignoremonitoring
	   --ignoreskippedcluster
	   --lockopt String
	   --lockstart
	   --lockstop
	   --locktype sanlock|dlm|none
	-l|--logicalvolume Number
	   --longhelp
	-p|--maxphysicalvolumes Number
	   --metadataprofile String
	   --monitor y|n
	   --noudevsync
	-P|--partial
	-s|--physicalextentsize Size[m|UNIT]
	   --poll y|n
	   --profile String
	   --pvmetadatacopies 0|1|2
	-q|--quiet
	   --refresh
	   --reportformat basic|json
	-x|--resizeable y|n
	-S|--select String
	   --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,
	     -c|--clustered y|n,
	     -s|--physicalextentsize Size[m|UNIT],
	     -x|--resizeable y|n,
		--addtag Tag,
		--deltag Tag,
		--alloc contiguous|cling|cling_by_tags|normal|any‐
	   where|inherit,
		--pvmetadatacopies 0|1|2,
		--[vg]metadatacopies all|unmanaged|Number,
		--profile String,
		--detachprofile,
		--metadataprofile String )
	   [ -A|--autobackup y|n ]
	   [ -S|--select String ]
	   [ -f|--force ]
	   [	--poll y|n ]
	   [	--ignoremonitoring ]
	   [	--ignoreskippedcluster ]
	   [	--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 ]
	   [	--ignoreskippedcluster ]
	   [	--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 ]
	   [	--ignoreskippedcluster ]
	   [	--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 ]
	   [	--ignorelockingfailure ]
	   [	--monitor y|n ]
	   [	--poll y|n ]
	   [	--ignoremonitoring ]
	   [	--ignoreskippedcluster ]
	   [	--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 ]
	   [	--ignoreskippedcluster ]
	   [	--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 ]
	   [	--lockopt String ]
	   [ COMMON_OPTIONS ]
	   [ VG|Tag|Select ... ]
       -

       Stop the lockspace of a shared VG in lvmlockd.

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

       Change the lock type for a shared VG.

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

       Common options for command:

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

OPTIONS
       -a|--activate y|n|ay
	      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, in which case an
	      LV is activated only if it matches an item in lvm.conf activa‐
	      tion/auto_activation_volume_list.	 If the list is not set, all
	      LVs are considered to match, and if if the list is set but
	      empty, no LVs match.  Autoactivation should be used during sys‐
	      tem boot to make it possible to select which LVs should be auto‐
	      matically activated by the system.  See lvmlockd(8) for more
	      information about activation options ey and sy for shared VGs.
	      See clvmd(8) for more information about activation options ey,
	      sy, ly and ln for clustered 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 acti‐
	      vated.  (This does not include the "mirror" type, see "raid1"
	      instead.)	 partial allows any LV with missing PVs to be acti‐
	      vated, and should only be used for recovery or repair.  For
	      default, see lvm.conf/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 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.

       -c|--clustered y|n
	      Change the clustered property of a VG using clvmd.  See clvmd(8)
	      for more information about clustered VGs.

       --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.

       -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.

       --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.

       --ignoreskippedcluster
	      Use to avoid exiting with an non-zero status code if the command
	      is run without clustered locking and clustered VGs are skipped.

       --lockopt String
	      Used to pass options for special cases to lvmlockd.  See lvm‐
	      lockd(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 auto‐
	      mated maintenance for the LV in reponse to specific events.  See
	      dmeventd(8) for more information.

       --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 lvm.conf missing_stripe_filler set‐
	      ting.  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
	      (starting in the 5th sector).  When 0, no copies of the VG meta‐
	      data are stored on the given PV.	This may be useful in VGs con‐
	      taining many PVs (this places limitations on the ability to use
	      vgsplit later.)

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

       --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.	 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 addi‐
	      tional "selected" field (-o selected) showing 1 if the row
	      matches the selection and 0 otherwise.  For non-reporting com‐
	      mands which process LVM entities, the selection is used to
	      choose items to process.

       --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 func‐
	      tionality needs to be disabled and this option acts as a short‐
	      cut which selects an appropriate set of options. Currently, this
	      is equivalent to using --ignorelockingfailure, --ignoremonitor‐
	      ing, --poll n, and setting env var LVM_SUPPRESS_LOCKING_FAIL‐
	      URE_MESSAGES.  When used in conjunction with lvmetad enabled and
	      running, 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 lvmsys‐
	      temid(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 meta‐
	      data, using the metadataignore flags on PVs to achieve the spec‐
	      ified 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 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.

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)

       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 2.02.176(2) (2017-11-03)	   VGCHANGE(8)
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