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Full Discussion: problem with lv
Operating Systems AIX problem with lv Post 302215364 by bakunin on Wednesday 16th of July 2008 06:45:30 AM
Old 07-16-2008
Your assumption is correct. "Inter-policy" means: either keep the LV at as few PVs as possible or distribute it over as many PVs as possible. The latter option was of much higher significance in the days when "PV" was a physical disk, not a share on some SAN-subsystem like today. Distributing the LV over many physical disks was a way to maximize disk-troughput back then (keep in mind that the LP size was much smaller back then and likely to fit in the disks cache).

Regarding your initial question: Your rootvg has been expanded and probably the LVs have not always been what they are now but were increased in size several times. The system simply had no other choice than to assign parts of different disks to fulfill the requirements.

You can correct this by running a "reorgvg" (see the man page for details, its straightforward), but i suggest doing a backup before first (to be real sure check the backup by installing it to a different machine) and second doing it during a time when the systems consumption is as low as possible - preferably at some maintenance downtime.

As i can see your rootvg is not mirrored. Is there a reason for this? If not: i would suggest making correcting this your first priority. This is very likely your biggest hazard here, in comparison the LV issues are negligeable.

bakunin
 

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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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