vgreduce man page on Archlinux

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VGREDUCE(8)							   VGREDUCE(8)

       vgreduce - reduce a volume group

       vgreduce [-a|--all] [-A|--autobackup {y|n}] [-d|--debug] [-h|-?|--help]
       [--removemissing] [-t|--test]  [-v|--verbose]  VolumeGroupName  [Physi‐

       vgreduce	 allows you to remove one or more unused physical volumes from
       a volume group.

       See lvm(8) for common options.

       -a, --all
	      Removes all empty physical volumes if none are given on  command

	      Removes  all  missing physical volumes from the volume group, if
	      there are no logical volumes allocated on	 those.	 This  resumes
	      normal  operation	 of  the volume group (new logical volumes may
	      again be created, changed and so on).

	      If this is not possible (there are logical  volumes  referencing
	      the  missing  physical volumes) and you cannot or do not want to
	      remove them manually, you can run this option  with  --force  to
	      have vgreduce remove any partial LVs.

	      Any  logical volumes and dependent snapshots that were partly on
	      the missing disks get removed completely.	 This  includes	 those
	      parts that lie on disks that are still present.

	      If your logical volumes spanned several disks including the ones
	      that are lost, you might want to try to salvage  data  first  by
	      activating  your	logical volumes with --partial as described in

       lvm(8), vgextend(8)

Sistina Software UK   LVM TOOLS 2.02.106(2) (2014-04-10)	   VGREDUCE(8)

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