HPUX : UX:vxfs mount: ERROR: V-3-24996: Unable to get disk layout version

Issue :

After system reboot vg failed to activate , manual activation show system is failed to query  the disk. ioscan show the disk status are claimed and available on the system.

Error :

mountall: cannot mount /dev/vg_edwpsw/orasw01_11g
mountall: diagnostics from mount
UX:vxfs mount: ERROR: V-3-20003: Cannot open /dev/vg_edwpsw/orasw01_11g: No such device or address
UX:vxfs mount: ERROR: V-3-24996: Unable to get disk layout version
mountall: cannot mount /dev/vg_edwpsw/orasw01
mountall: diagnostics from mount
UX:vxfs mount: ERROR: V-3-20003: Cannot open /dev/vg_edwpsw/orasw01: No such device or address
UX:vxfs mount: ERROR: V-3-24996: Unable to get disk layout version
mountall: cannot mount /dev/vg_edwpsw/lv_apps
mountall: diagnostics from mount
UX:vxfs mount: ERROR: V-3-20003: Cannot open /dev/vg_edwpsw/lv_apps: No such device or address
UX:vxfs mount: ERROR: V-3-24996: Unable to get disk layout version

[root@jupiterA:/etc/lvmconf]#
#-> grep -i "Wrong disk" /var/adm/syslog/syslog.log
Sep  1 16:42:42 jupiterA vmunix: LVM: VG 64 0x080000: PVLink 1 0x00009f Attach failed. Wrong disk!
Sep  1 17:14:45 jupiterA vmunix: LVM: VG 64 0x080000: PVLink 1 0x00009f Attach failed. Wrong disk!
Sep  1 17:14:45 jupiterA vmunix: LVM: VG 64 0x080000: PVLink 1 0x0000a6 Attach failed. Wrong disk!
Sep  1 17:14:45 jupiterA vmunix: LVM: VG 64 0x080000: PVLink 1 0x00011e Attach failed. Wrong disk!
Sep  1 17:14:45 jupiterA vmunix: LVM: VG 64 0x080000: PVLink 1 0x00011f Attach failed. Wrong disk!
Sep  1 17:15:13 jupiterA vmunix: LVM: VG 64 0x080000: PVLink 1 0x0000a6 Attach failed. Wrong disk!
[root@jupiterA:/etc/lvmconf]#


Recommendation Action :

Restore the vg cofinguration on the Disk , after verifying the disk and VG association.

#-> vgcfgrestore -f vg_edwpsw.conf.old -l
Volume Group Configuration information in "vg_edwpsw.conf.old"
VG Name /dev/vg_edwpsw
 ---- Physical volumes : 4 ----
       /dev/rdisk/disk149 (Non-bootable)
       /dev/rdisk/disk156 (Non-bootable)
       /dev/rdisk/disk276 (Non-bootable)
       /dev/rdisk/disk277 (Non-bootable)


vgcfgrestore  -f /etc/lvmconf/vg_edwpsw.conf.old /dev/rdisk/disk149
vgcfgrestore  -f /etc/lvmconf/vg_edwpsw.conf.old /dev/rdisk/disk156
vgcfgrestore  -f /etc/lvmconf/vg_edwpsw.conf.old /dev/rdisk/disk276
vgcfgrestore  -f /etc/lvmconf/vg_edwpsw.conf.old /dev/rdisk/disk277

[root@jupiterA:/home/ssingh45]#
#-> vgimport -sN -m vg_edwpsw.mapfile.ssingh45 vg_edwpsw
vgimport: Quorum not present, or some physical volume(s) are missing.
vgimport: Volume group "/dev/vg_edwpsw" has been successfully created.
Warning: A backup of this volume group may not exist on this machine.
Please remember to take a backup using the vgcfgbackup command after activating the volume group.

vgcfgrestore command not able to resolve the issue, finally it was decided to re-create the VG with new set of Disk as , old set of disk are always are problematic , after reboot and maintenance.

Size of disk in conf and in diskscan are different which causing the conflict. it seems something messy how it was happen. no clue , might someone imported with wrong mapfile.

#-> vgcfgrestore -vl -n vg_edwpsw
Volume Group Configuration information in "/etc/lvmconf/vg_edwpsw.conf"
VG Name /dev/vg_edwpsw
 ---- Physical volumes : 4 ----
      PV         Type         Size (kb)          Start (kb)   PVkey
     disk149   Non-Boot      104857920          21184        2
     disk156   Non-Boot      104857920          21184        3
     disk276   Non-Boot       39846720          21184        4
     disk277   Non-Boot       39846720          21184        5

max_pv 255  max_pe 10000 max_lv 255 vg_version 1.0


SCSI describe of /dev/rdisk/disk149:
             vendor: HP
         product id: OPEN-V
               type: direct access
               size: 39846720 Kbytes
   bytes per sector: 512
SCSI describe of /dev/rdisk/disk156:
             vendor: HP
         product id: OPEN-V
               type: direct access
               size: 39846720 Kbytes
   bytes per sector: 512
SCSI describe of /dev/rdisk/disk276:
             vendor: HP
         product id: OPEN-V
               type: direct access
               size: 104857920 Kbytes
   bytes per sector: 512
SCSI describe of /dev/rdisk/disk277:
             vendor: HP
         product id: OPEN-V
               type: direct access
               size: 104857920 Kbytes
   bytes per sector: 512