VGCHANGE(8)    (LVM TOOLS 2.03.11(2) (2021-01-08))    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
              --commandprofile String
              --config String
           -d|--debug
              --deltag Tag
              --detachprofile
              --driverloaded y|n
           -f|--force
           -h|--help
           -K|--ignoreactivationskip
              --ignorelockingfailure
              --ignoremonitoring
              --lockopt String
              --lockstart
              --lockstop
              --locktype sanlock|dlm|none
           -l|--logicalvolume Number
              --longhelp
           -p|--maxphysicalvolumes Number
              --metadataprofile String
              --monitor y|n
              --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
              --sysinit
              --systemid String
           -t|--test

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           -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 )
              [ -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 ]

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              [    --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 ]
              [    --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 ]

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              [ 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 command:

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

     OPTIONS
          -a|--activate y|n|ay

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               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
               activation/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 system boot to make it possible
               to select which LVs should be automatically activated
               by the system.  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/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 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

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

          -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

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               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.

          --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.

          --nolocking

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               Disable locking.

          --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 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

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               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.  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.

          --sysinit
               Indicates that vgchange/lvchange is being invoked from
               early system initialisation scripts (e.g. rc.sysinit or

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               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

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               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: bBsSkKmMgGtTpPeE.  b|B is bytes,
               s|S is sectors of 512 bytes, k|K is KiB,  m|M  is  MiB,
               g|G  is GiB, t|T is TiB, p|P is PiB, e|E is EiB.  (This
               should not be confused with the output control --units,
               where capital letters mean multiple of 1000.)

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

     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)

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

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

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

          lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8)
          blkdeactivate(8) lvmdump(8)

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

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

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