Linux "vgconvert" Command Line Options and Examples
Change volume group metadata format

vgconvert converts VG metadata from one format to another. The new metadata format must be able to fit into the space provided by the old format. Because the LVM1 format should no longer be used, this command is no longer needed in general.


Usage:

vgconvert position_args
      [ option_args ]






Command Line Options:

--bootloaderareasize
Create a separate bootloader area of specified size besides PV's data area. The bootloader area is anarea of reserved space on the PV from which LVM will not allocate any extents and it's kept untouched.This is primarily aimed for use with bootloaders to embed their own data or metadata. The start of thebootloader area is always aligned, see also --dataalignment and --dataalignmentoffset. The bootloaderarea size may eventually end up increased due to the alignment, but it's never less than the size thatis requested. To see the bootloader area start and size of an existing PV use pvs -o+pv_ba_start,pv_ba_size.
vgconvert --bootloaderareasize ...
--commandprofile
The command profile to use for command configuration. See lvm.conf(5) for more information about pro‐files.
vgconvert --commandprofile ...
--config
Config settings for the command. These override lvm.conf settings. The String arg uses the same formatas lvm.conf, or may use section/field syntax. See lvm.conf(5) for more information about config.
vgconvert --config ...
-d|--debug
Set debug level. Repeat from 1 to 6 times to increase the detail of messages sent to the log fileand/or syslog (if configured).
vgconvert -d|--debug ...
--driverloaded
If set to no, the command will not attempt to use device-mapper. For testing and debugging.
vgconvert --driverloaded ...
-f|--force
Override various checks, confirmations and protections. Use with extreme caution.
vgconvert -f|--force ...
-h|--help
Display help text.
vgconvert -h|--help ...
--labelsector
By default the PV is labelled with an LVM2 identifier in its second sector (sector 1). This lets youuse a different sector near the start of the disk (between 0 and 3 inclusive - see LABEL_SCAN_SECTORSin the source). Use with care.
vgconvert --labelsector ...
--longhelp
Display long help text.
vgconvert --longhelp ...
--metadatasize
The approximate amount of space used for each VG metadata area. The size may be rounded.
vgconvert --metadatasize ...
-M|--metadatatype
Specifies the type of on-disk metadata to use. lvm2 (or just 2) is the current, standard format. lvm1(or just 1) is a historical format that can be used for accessing old data.
vgconvert -M|--metadatatype ...
--profile
An alias for --commandprofile or --metadataprofile, depending on the command.
vgconvert --profile ...
--pvmetadatacopies
The number of metadata areas to set aside on a PV for storing VG metadata. When 2, one copy of the VGmetadata is stored at the front of the PV and a second copy is stored at the end. When 1, one copy ofthe VG metadata is stored at the front of the PV (starting in the 5th sector). When 0, no copies ofthe VG metadata are stored on the given PV. This may be useful in VGs containing many PVs (this placeslimitations on the ability to use vgsplit later.)
vgconvert --pvmetadatacopies ...
-q|--quiet
Suppress output and log messages. Overrides --debug and --verbose. Repeat once to also suppress anyprompts with answer 'no'.
vgconvert -q|--quiet ...
--reportformat
Overrides current output format for reports which is defined globally by the report/output_format set‐ting in lvm.conf. basic is the original format with columns and rows. If there is more than onereport per command, each report is prefixed with the report name for identification. json producesreport output in JSON format. See lvmreport(7) for more information.
vgconvert --reportformat ...
-t|--test
Run in test mode. Commands will not update metadata. This is implemented by disabling all metadatawriting but nevertheless returning success to the calling function. This may lead to unusual error mes‐sages in multi-stage operations if a tool relies on reading back metadata it believes has changed buthasn't.
vgconvert -t|--test ...
-v|--verbose
Set verbose level. Repeat from 1 to 4 times to increase the detail of messages sent to stdout andstderr.
vgconvert -v|--verbose ...
--version
Display version information.
vgconvert --version ...
-y|--yes
Do not prompt for confirmation interactively but always assume the answer yes. Use with extreme cau‐tion. (For automatic no, see -qq.)VARIABLESVGVolume Group name. See lvm(8) for valid names.StringSee 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 val‐ues, regardless of capitalization, e.g. 'k' and 'K' both refer to 1024. The default input unit isspecified 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 kilobytes, m|M is megabytes, g|G is gigabytes, t|T isterabytes, p|P is petabytes, e|E is exabytes. (This should not be confused with the output control
vgconvert -y|--yes ...
--units,
ENVIRONMENT VARIABLESSee lvm(8) for information about environment variables used by lvm. For example, LVM_VG_NAME can generally besubstituted for a required VG parameter.
vgconvert --units, ...