VGCHANGE(8)



VGCHANGE(8)                 System Manager's Manual                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
        -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|in-
           herit,
                --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 un-
              available.  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/re-
              moved.  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 re-
              lease 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 in-
              formation 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 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 de-
              fault, 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.  in-
              herit 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.

       --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.

       --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 im-
              proving 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.

       --nolocking
              Disable locking.

       --noudevsync
              Disables udev synchronisation. The process will not wait for no-
              tification from udev. It will continue irrespective of any pos-
              sible 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 ex-
              tents.  Missing extents may be replaced with error or zero seg-
              ments 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 ev-
              erything 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 in-
              complete 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 limi-
              tations 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'.

       --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 se-
              lectable 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.  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 un-
              usual 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 de-
              tail 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)  lvmpolld(8)  lvmlockd(8)  lvmlockctl(8)  cmirrord(8) lvmd-
       busd(8)

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

Red Hat, Inc.          LVM TOOLS 2.03.07(2) (2019-11-30)           VGCHANGE(8)

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