11-11-2005
HP-UX logical volume length mapping
HI,
I have to find the length of the logical vol. that is spanned on different PV.
Now i have to find that is any bit map type structure of physical extents of any logical volumes and how i can find that.
Suppose I extend one LV on two PV on same VG.
How i can jump on the starting location of 2nd PV physically?
If I create one LV called /home1 of 500Mb and then /home2 of 345Mb and then i extend /home1 on first PV and then 2nd PV and then i delete /home2 then how i can trverse the /home1?
My main aim is to trverse the whole /home1 LV through my program.
One more query is that I want to find the bitmap structure of all used/unused datablocks and Inodes in the Vxfs File system.
Regards
Sandy
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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 [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)