# man > vgmerge(8) [_VGMERGE_(8)](https://www.chedong.com/phpMan.php/man/VGMERGE/8/markdown) System Manager's Manual [_VGMERGE_(8)](https://www.chedong.com/phpMan.php/man/VGMERGE/8/markdown) ## NAME vgmerge — Merge volume groups ## SYNOPSIS **vgmerge _**position_args_ [ _option_args_ ] ## DESCRIPTION vgmerge merges two existing VGs. The inactive source VG is merged into the destination VG if physical extent sizes are equal and PV and LV summaries of both VGs fit into the destination VG's limits. ## USAGE **vgmerge _**VG_ _VG_ [ **-A**|**--autobackup y**|**n **] [ **-l**|**--list **] [ **--poolmetadataspare y**|**n **] [ COMMON_OPTIONS ] Common options for lvm: [ **-d**|**--debug **] [ **-h**|**--help **] [ **-q**|**--quiet **] [ **-t**|**--test **] [ **-v**|**--verbose **] [ **-y**|**--yes **] [ **--commandprofile _**String_ ] [ **--config _**String_ ] [ **--devices _**PV_ ] [ **--devicesfile _**String_ ] [ **--driverloaded y**|**n **] [ **--journal _**String_ ] [ **--lockopt _**String_ ] [ **--longhelp **] [ **--nohints **] [ **--nolocking **] [ **--profile _**String_ ] [ **--version **] ## OPTIONS ### -A --autobackup y Specifies if metadata should be backed up automatically after a change. Enabling this is strongly advised! See [**vgcfgbackup**(8)](https://www.chedong.com/phpMan.php/man/vgcfgbackup/8/markdown) for more information. **--commandprofile _**String_ The command profile to use for command configuration. See [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown) for more infor‐ mation about profiles. **--config _**String_ Config settings for the command. These override [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown) settings. The String arg uses the same format as [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown), or may use section/field syntax. See [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown) 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). **--devices _**PV_ Restricts the devices that are visible and accessible to the command. Devices not listed will appear to be missing. This option can be repeated, or accepts a comma sep‐ arated list of devices. This overrides the devices file. **--devicesfile _**String_ A file listing devices that LVM should use. The file must exist in _/etc/lvm/devices/_ and is managed with the [**lvmdevices**(8)](https://www.chedong.com/phpMan.php/man/lvmdevices/8/markdown) command. This overrides the [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown) **de‐** **vices/devicesfile **and **devices/use_devicesfile **settings. **--driverloaded y**|**n** If set to no, the command will not attempt to use device-mapper. For testing and de‐ bugging. ### -h --help Display help text. **--journal _**String_ Record information in the systemd journal. This information is in addition to infor‐ mation enabled by the lvm.conf log/journal setting. command: record information about the command. output: record the default command output. debug: record full command debugging. ### -l --list Display merged destination VG like vgdisplay -v. **--lockopt _**String_ Used to pass options for special cases to lvmlockd. See [**lvmlockd**(8)](https://www.chedong.com/phpMan.php/man/lvmlockd/8/markdown) for more informa‐ tion. ### --longhelp Display long help text. ### --nohints Do not use the hints file to locate devices for PVs. A command may read more devices to find PVs when hints are not used. The command will still perform standard hint file invalidation where appropriate. ### --nolocking Disable locking. Use with caution, concurrent commands may produce incorrect results. **--poolmetadataspare y**|**n** Enable or disable the automatic creation and management of a spare pool metadata LV in the VG. A spare metadata LV is reserved space that can be used when repairing a pool. **--profile _**String_ An alias for --commandprofile or --metadataprofile, depending on the command. ### -q --quiet Suppress output and log messages. Overrides --debug and --verbose. Repeat once to also suppress any prompts with answer 'no'. ### -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 read‐ ing back metadata it believes has changed but hasn't. ### -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. ### -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)](https://www.chedong.com/phpMan.php/man/lvm/8/markdown) for valid names. _String_ See the option description for information about the string content. _Size_[UNIT] Size is an input number that accepts an optional unit. Input units are always treated as base two values, regardless of capitalization, e.g. 'k' and 'K' both refer to 1024. The default input unit is specified by letter, followed by |UNIT. UNIT represents other possible input units: **b**|**B **is bytes, **s**|**S **is sectors of 512 bytes, **k**|**K **is KiB, **m**|**M** is MiB, **g**|**G **is GiB, **t**|**T **is TiB, **p**|**P **is PiB, **e**|**E **is EiB. (This should not be confused with the output control --units, where capital letters mean multiple of 1000.) ## ENVIRONMENT VARIABLES See [**lvm**(8)](https://www.chedong.com/phpMan.php/man/lvm/8/markdown) for information about environment variables used by lvm. For example, LVM_VG_NAME can generally be substituted for a required VG parameter. ## EXAMPLES Merge an inactive VG named "vg00" into the active or inactive VG named "databases", giving verbose runtime information. ### vgmerge -v databases vg00 ## SEE ALSO [**lvm**(8)](https://www.chedong.com/phpMan.php/man/lvm/8/markdown), [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown), [**lvmconfig**(8)](https://www.chedong.com/phpMan.php/man/lvmconfig/8/markdown), [**lvmdevices**(8)](https://www.chedong.com/phpMan.php/man/lvmdevices/8/markdown), [**pvchange**(8)](https://www.chedong.com/phpMan.php/man/pvchange/8/markdown), [**pvck**(8)](https://www.chedong.com/phpMan.php/man/pvck/8/markdown), [**pvcreate**(8)](https://www.chedong.com/phpMan.php/man/pvcreate/8/markdown), [**pvdisplay**(8)](https://www.chedong.com/phpMan.php/man/pvdisplay/8/markdown), [**pvmove**(8)](https://www.chedong.com/phpMan.php/man/pvmove/8/markdown), [**pvremove**(8)](https://www.chedong.com/phpMan.php/man/pvremove/8/markdown), [**pvresize**(8)](https://www.chedong.com/phpMan.php/man/pvresize/8/markdown), [**pvs**(8)](https://www.chedong.com/phpMan.php/man/pvs/8/markdown), [**pvscan**(8)](https://www.chedong.com/phpMan.php/man/pvscan/8/markdown), [**vgcfgbackup**(8)](https://www.chedong.com/phpMan.php/man/vgcfgbackup/8/markdown), [**vgcfgrestore**(8)](https://www.chedong.com/phpMan.php/man/vgcfgrestore/8/markdown), [**vgchange**(8)](https://www.chedong.com/phpMan.php/man/vgchange/8/markdown), [**vgck**(8)](https://www.chedong.com/phpMan.php/man/vgck/8/markdown), [**vgcreate**(8)](https://www.chedong.com/phpMan.php/man/vgcreate/8/markdown), [**vgconvert**(8)](https://www.chedong.com/phpMan.php/man/vgconvert/8/markdown), [**vgdisplay**(8)](https://www.chedong.com/phpMan.php/man/vgdisplay/8/markdown), [**vgexport**(8)](https://www.chedong.com/phpMan.php/man/vgexport/8/markdown), [**vgextend**(8)](https://www.chedong.com/phpMan.php/man/vgextend/8/markdown), [**vgimport**(8)](https://www.chedong.com/phpMan.php/man/vgimport/8/markdown), [**vgimportclone**(8)](https://www.chedong.com/phpMan.php/man/vgimportclone/8/markdown), [**vgimportdevices**(8)](https://www.chedong.com/phpMan.php/man/vgimportdevices/8/markdown), [**vgmerge**(8)](https://www.chedong.com/phpMan.php/man/vgmerge/8/markdown), [**vgmknodes**(8)](https://www.chedong.com/phpMan.php/man/vgmknodes/8/markdown), [**vgreduce**(8)](https://www.chedong.com/phpMan.php/man/vgreduce/8/markdown), [**vgremove**(8)](https://www.chedong.com/phpMan.php/man/vgremove/8/markdown), [**vgrename**(8)](https://www.chedong.com/phpMan.php/man/vgrename/8/markdown), [**vgs**(8)](https://www.chedong.com/phpMan.php/man/vgs/8/markdown), [**vgscan**(8)](https://www.chedong.com/phpMan.php/man/vgscan/8/markdown), [**vgsplit**(8)](https://www.chedong.com/phpMan.php/man/vgsplit/8/markdown), [**lvcreate**(8)](https://www.chedong.com/phpMan.php/man/lvcreate/8/markdown), [**lvchange**(8)](https://www.chedong.com/phpMan.php/man/lvchange/8/markdown), [**lvconvert**(8)](https://www.chedong.com/phpMan.php/man/lvconvert/8/markdown), [**lvdisplay**(8)](https://www.chedong.com/phpMan.php/man/lvdisplay/8/markdown), [**lvextend**(8)](https://www.chedong.com/phpMan.php/man/lvextend/8/markdown), [**lvreduce**(8)](https://www.chedong.com/phpMan.php/man/lvreduce/8/markdown), [**lvremove**(8)](https://www.chedong.com/phpMan.php/man/lvremove/8/markdown), [**lvrename**(8)](https://www.chedong.com/phpMan.php/man/lvrename/8/markdown), [**lvresize**(8)](https://www.chedong.com/phpMan.php/man/lvresize/8/markdown), [**lvs**(8)](https://www.chedong.com/phpMan.php/man/lvs/8/markdown), [**lvscan**(8)](https://www.chedong.com/phpMan.php/man/lvscan/8/markdown), [**lvm-fullreport**(8)](https://www.chedong.com/phpMan.php/man/lvm-fullreport/8/markdown), [**lvm-lvpoll**(8)](https://www.chedong.com/phpMan.php/man/lvm-lvpoll/8/markdown), [**blkdeactivate**(8)](https://www.chedong.com/phpMan.php/man/blkdeactivate/8/markdown), [**lvmdump**(8)](https://www.chedong.com/phpMan.php/man/lvmdump/8/markdown), [**dmeventd**(8)](https://www.chedong.com/phpMan.php/man/dmeventd/8/markdown), [**lvmpolld**(8)](https://www.chedong.com/phpMan.php/man/lvmpolld/8/markdown), [**lvmlockd**(8)](https://www.chedong.com/phpMan.php/man/lvmlockd/8/markdown), [**lvmlockctl**(8)](https://www.chedong.com/phpMan.php/man/lvmlockctl/8/markdown), [**cmirrord**(8)](https://www.chedong.com/phpMan.php/man/cmirrord/8/markdown), [**lvmdbusd**(8)](https://www.chedong.com/phpMan.php/man/lvmdbusd/8/markdown), [**fsadm**(8)](https://www.chedong.com/phpMan.php/man/fsadm/8/markdown), [**lvmsystemid**(7)](https://www.chedong.com/phpMan.php/man/lvmsystemid/7/markdown), [**lvmreport**(7)](https://www.chedong.com/phpMan.php/man/lvmreport/7/markdown), [**lvmraid**(7)](https://www.chedong.com/phpMan.php/man/lvmraid/7/markdown), [**lvmthin**(7)](https://www.chedong.com/phpMan.php/man/lvmthin/7/markdown), [**lvmcache**(7)](https://www.chedong.com/phpMan.php/man/lvmcache/7/markdown) Red Hat, Inc. LVM TOOLS [2.03.16(2)](https://www.chedong.com/phpMan.php/man/2.03.16/2/markdown) (2022-05-18) [_VGMERGE_(8)](https://www.chedong.com/phpMan.php/man/VGMERGE/8/markdown)