vgdisplay lists incorrect quantity of physical volumns

[RussellFrost]

I have a system running 11.11 which is showing an incorrect quantity of physical disks when using the vgdisplay command:

# vgdisplay -v /dev/vg01
--- Volume groups ---
VG Name /dev/vg01
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 1
Open LV 1
Max PV 16
Cur PV 3
Act PV 1
Max PE per PV 17502
VGDA 2
PE Size (Mbytes) 4
Total PE 17499
Alloc PE 17499
Free PE 0
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

--- Logical volumes ---
LV Name /dev/oradatavg/oradatalv
LV Status available/syncd
LV Size (Mbytes) 69996
Current LE 17499
Allocated PE 17499
Used PV 1


--- Physical volumes ---
PV Name /dev/dsk/c1t0d0
PV Status available
Total PE 17499
Free PE 0
Autoswitch On




# strings /etc/lvmtab
/dev/vg00
/dev/dsk/c1t2d0
/dev/vg01
/dev/dsk/c1t0d0


The "Cur PV 3" line from vgdisplay is incorrect - I know that there is only one physical disk in vg01. There are only two disks currently in the system. ioscan verifies that two disks are available, diskinfo verifies that both disks are working OK.

How do I correct the "Cur PV" information?

Thanks for your time,
Russell

[RAC_1]

mv /etc/lvmtab/etc/lvmtab.old

vgscan -pva (to check in preview mode)
vgscan -av (To rebuild /etc/lvmtab)

check and post the results.

Anil

[Ashwani Kashyap]

Do you get any error messages when doing vgdisplay -v /dev/vg01 ?

Is is possible that some unused disks that were part of vg01 were removed from the system .

Did someone accidently replace the lvmtab file from some old copy .

Check the contents of /etc/lvmconf directory and look for the last succesful backup of vg01.conf .

Use: vgcfgrestore -n /dev/VG_NAME -l to see the list of physical volumes contained within the last good backup.

[RussellFrost]

Here are the results of vgscan:

# vgscan -pva
vgscan: The physical volume "/dev/dsk/c1t0d0" is already recorded in the "/etc/lvmtab" file.
vgscan: The physical volume "/dev/dsk/c1t2d0" is already recorded in the "/etc/lvmtab" file.
Couldn't stat physical volume "/dev/dsk/c3t2d0":
Invalid argument

vgscan: has no correspoding valid raw device file under /dev/rdsk.
Verification of unique LVM disk id on each disk in the volume group
/dev/vg01 failed.


/dev/vg00
/dev/dsk/c1t2d0


(Note - "/dev/dsk/c3t2d0" is the CDROM)

and here is the result of vgcfgrestore:

# vgcfgrestore -n /dev/vg01 -l
Volume Group Configuration information in "/etc/lvmconf/vg01.conf"
VG Name /dev/vg01
---- Physical volumes : 1 ----
/dev/rdsk/c1t0d0 (Non-bootable)



I'm sure that _something_ must have changed - but I don't know the history of this particular system and the local admin swears that no disk related changes have been made. I do have the ability to recover the entire system from tape if I need to, but I would rather understand the problem and correct it.

[RAC_1]

How many disk you have on your system?

ioscan -fnCdisk

(exclude CDROM) and do pvdisplay on each disk. Check how many reports they belong to vg01. I doubt only one will report.

Though this can be corrected, we will try to find out what is reporting that.

Anil

[Geoff Wild · Accepted solution]

Ok - current PV = 3, yet only 1 physical volume is listed....

force reduction of missing physical volume(s) in a given volume group.

vgreduce -f /dev/vg01

Then:

rmsf -a /dev/dsk/c3t2d0

then try the vgdisplay -v....

If that doesn't clear it up, you might have to un mount it as well:

umount /mntpoint

then vgchange -a n it, then vgchange -a y it, then remount - see if you still see the 3 PV's....

Rgds...Geoff

[Helen French]

I think your issue is the difference between the running kernel and your LVM defenitions. Both should match inorder to get the same number in current and active PV numbers. The reason might be becuase of an improper disk removal, in correct vgimport etc. This document has a good explanation and solution (TKB #KBRC00000632):

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000065011231

[RussellFrost]

"vgreduce -f" fixed the problem. Here's what I did:

vgreduce -f /dev/vg01
mv /etc/lvmtab /etc/lvmtab.old
vgscan -av
vgcfgbackup /dev/vg01

Thank you all for the help.