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Operating Systems AIX access data from a new disk was assigned another rootvg Post 302666769 by bakunin on Thursday 5th of July 2012 06:23:44 AM
Old 07-05-2012
hmm, the VGDA (volume group descriptor area) is also part of the aforementioned information on the disk, which is copied to and maintained in the ODM. Something seems to have gone wrong. Without exactly knowing the details it is hard to advise specifically, though. The following is as generic as possible.

First, make sure you get your ODM clean: disconnect the disk, run cfgmgr and (out of pure paranoia) a synclvodm. You can also reboot the system instead, if this is possible.

Reconnect the disk, run cfgmgr again and then try a recreatevg. If this doesn't work probably some accounting information on the disk is damaged. To rebuild a a damaged VGDA is possible in principle (there are two copies of it on every PV in the VG, so the chance of finding one working copy and distributing this is intact), but is not an easy task. There are several how-tos about this circulating in the net. It is probably easier to restore the data in question from some backup, though.

I hope this helps.

bakunin
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VGDISPLAY(8)						      System Manager's Manual						      VGDISPLAY(8)

NAME
vgdisplay - display attributes of volume groups SYNOPSIS
vgdisplay [-A|--activevolumegroups] [-c|--colon] [-d|--debug] [-D|--disk] [-h|--help] [-s|--short] [-v[v]|--verbose [--verbose]] [--ver- sion] [VolumeGroupName...] DESCRIPTION
vgdisplay allows you to see the attributes of VolumeGroupName (or all volume groups if none is given) with it's physical and logical vol- umes and their sizes etc. OPTIONS -A, --activevolumegroups Only select the active volume groups. -c, --colon Generate colon seperated output for easier parsing in scripts or programs. The values are: 1 volume group name 2 volume group access 3 volume group status 4 internal volume group number 5 maximum number of logical volumes 6 current number of logical volumes 7 open count of all logical volumes in this volume group 8 maximum logical volume size 9 maximum number of physical volumes 10 current number of physical volumes 11 actual number of physical volumes 12 size of volume group in kilobytes 13 physical extent size 14 total number of physical extents for this volume group 15 allocated number of physical extents for this volume group 16 free number of physical extents for this volume group 17 uuid of volume group -d, --debug Enables additional debugging output (if compiled with DEBUG). -D, --disk Show attributes from the volume group descriptor area on disk(s). Without this switch they are shown from the kernel. Useful if the volume group isn't activated. -h, --help Print a usage message on standard output and exit successfully. -s, --short Give a short listing showing the existence of volume groups. -v, --verbose Display verbose information containing long listings of physical and logical volumes. If given twice, also display verbose runtime information of vgdisplay's activities. --version Display version and exit successfully. DIAGNOSTICS
vgdisplay returns an exit code of 0 for success and > 0 for error: 1 error reading VGDA 2 volume group doesn't exist 3 not all physical volumes of volume group online 4 volume group not found 5 no volume groups found at all 6 error reading VGDA from lvmtab 95 driver/module not in kernel 96 invalid I/O protocol version 97 error locking logical volume manager 98 invalid lvmtab (run vgscan(8)) 99 invalid command line SEE ALSO
lvm(8), pvcreate(8), vgcreate(8), lvcreate(8) AUTHOR
Heinz Mauelshagen <Linux-LVM@Sistina.com> Heinz Mauelshagen LVM TOOLS VGDISPLAY(8)
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