-A|--autobackup

Specifies if metadata should be backed up automatically after a change. Enabling this is strongly advised! See vgcfgbackup(8)for more information.

--commandprofile

The command profile to use for command configuration. See lvm.conf(5) for more information about profiles.

--config

Config settings for the command. These override lvm.conf settings. The String arg uses the same format as lvm.conf, or mayuse 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 config‐ured).

--driverloaded

If set to no, the command will not attempt to use device-mapper. For testing and debugging.

-l|--extents

Specifies the new size of the LV in logical extents. The --size and --extents options are alternate methods of specifyingsize. The total number of physical extents used will be greater when redundant data is needed for RAID levels. An alternatesyntax allows the size to be determined indirectly as a percentage of the size of a related VG, LV, or set of PVs. The suffix%VG denotes the total size of the VG, the suffix %FREE the remaining free space in the VG, and the suffix %PVS the free spacein the specified PVs. For a snapshot, the size can be expressed as a percentage of the total size of the origin LV with thesuffix %ORIGIN (100%ORIGIN provides space for the whole origin). When expressed as a percentage, the size defines an upperlimit for the number of logical extents in the new LV. The precise number of logical extents in the new LV is not determineduntil the command has completed. When the plus + or minus - prefix is used, the value is not an absolute size, but is rela‐tive and added or subtracted from the current size.

-f|--force

Override various checks, confirmations and protections. Use with extreme caution.

-h|--help

Display help text.

--longhelp

Display long help text.

-n|--nofsck

Do not perform fsck before resizing filesystem when filesystem requires it. You may need to use --force to proceed with thisoption.

--noudevsync

Disables udev synchronisation. The process will not wait for notification 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 cre‐ates.

--profile

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'.

--reportformat

Overrides current output format for reports which is defined globally by the report/output_format setting in lvm.conf. basicis the original format with columns and rows. If there is more than one report per command, each report is prefixed with thereport name for identification. json produces report output in JSON format. See lvmreport(7) for more information.

-r|--resizefs

Resize underlying filesystem together with the LV using fsadm(8).

-L|--size

Specifies the new size of the LV. The --size and --extents options are alternate methods of specifying size. The total num‐ber of physical extents used will be greater when redundant data is needed for RAID levels. When the plus + or minus - prefixis used, the value is not an absolute size, but is relative and added or subtracted from the current size.

-t|--test

Run in test mode. Commands will not update metadata. This is implemented by disabling all metadata writing but neverthelessreturning success to the calling function. This may lead to unusual error messages in multi-stage operations if a tool relieson reading 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.)VARIABLESLVLogical Volume name. See lvm(8) for valid names. An LV positional arg generally includes the VG name and LV name, e.g.VG/LV.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 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 ismegabytes, g|G is gigabytes, t|T is terabytes, p|P is petabytes, e|E is exabytes. (This should not be confused with the out‐put control --units, where capital letters mean multiple of 1000.)ENVIRONMENT VARIABLESSee lvm(8) for information about environment variables used by lvm. For example, LVM_VG_NAME can generally be substituted for arequired VG parameter.EXAMPLESReduce the size of an LV by 3 logical extents:lvreduce -l -3 vg00/lvol1