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Operating Systems AIX AIX striped LV - lslv stripe width has wrong value Post 302380148 by Scott on Monday 14th of December 2009 11:17:22 AM
Old 12-14-2009
AIX striped LV - lslv stripe width has wrong value

Hello all.

I have a volume group with 8 PV's, and a logical volume striped across these 8 volumes.

However, an lslv is showing:

Code:
STRIPE WIDTH:       9
STRIPE SIZE:        64k

There's really only eight disks, so how can the stripe width be 9?

ODM also showed this:

Code:
# odmget CuAt | grep -p data01lv | grep -p '"9"'
CuAt:
        name = "data01lv"
        attribute = "stripe_width"
        value = "9"
        type = "R"
        generic = "DU"
        rep = "r"
        nls_index = 1100

CuAt:
        name = "data01lv"
        attribute = "upperbound"
        value = "9"
        type = "R"
        generic = "DU"
        rep = "r"
        nls_index = 646

So I updated the ODM to change the 9 to 8, but the lslv still shows 9.

I've extended the VG with eight new disks, but obviously when I try to change the LV upperbound limit, get the error:

Code:
# chlv -u 16 data01lv
0516-1441 chlv: Striped logical volume upperbound can only be an even multiple of the striping width.
0516-704 chlv: Unable to change logical volume data01lv.

Any suggestions about how I can fix this would be greatly appreciated. I suppose one option would be to add ten disks and change the upperbound to 18, but that's missing the point somewhat!

Code:
oslevel -s
5300-08-04-0844

Many thanks.
 

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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 [Phys- icalVolumePath...] DESCRIPTION
vgreduce allows you to remove one or more unused physical volumes from a volume group. OPTIONS
See lvm(8) 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 2.02.105(2)-RHEL7 (2014-03-26) VGREDUCE(8)
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