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Full Discussion: Striped FS , need to add new disks
Operating Systems AIX Striped FS , need to add new disks Post 302553783 by koschi on Thursday 8th of September 2011 04:09:18 PM
Old 09-08-2011
If the LV that FS is based on has a stripe width of 12, you have to add another 12 disks to increase it.
Unlike with PP level "striping" (maximum inter policy), you can not add any smaller number to the VG and the LV will just take what is available.
If you can not add 12 disks due to whatever reason, you can migrate the data to another (already predefined) LV with a smaller stripe width. cplv is able to do that. You would specify the target LV that you already created on the 10 disk, it accepts it regardless if there is striping or not.
A downtime is required for the activity, since you can not copy open LVs and need to chfs and remount the file system.
 

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LEARN ABOUT OSF1

vgreduce

VGREDUCE(8)						      System Manager's Manual						       VGREDUCE(8)

NAME

       vgreduce - reduce a volume group

SYNOPSIS

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

DESCRIPTION

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

OPTIONS

       See lvm for common options.

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

       --removemissing
	      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 acti-
	      vating your logical volumes with --partial as described in lvm (8).

SEE ALSO

       lvm(8), vgextend(8)

Sistina Software UK					 LVM TOOLS 2.02.95(2) (2012-03-06)					       VGREDUCE(8)
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