Provided by: lvm2_2.03.11-2.1ubuntu4_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
        -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
        -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 ]
           [    --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 ]
           [ 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
              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 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 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
              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 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 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: 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)

       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)