root@hp-ux:/ # vgdisplay
vgdisplay: /etc/lvmtab: No such file or directory
vgdisplay: No volume group name could be read from “/etc/lvmtab”.
To recreate the /etc/lvmtab, run vgscan -a to make it rescan all the multipathed physical volumes
root@hp-ux:/ # vgscan -a
Following Physical Volumes belong to one Volume Group.
Unable to match these Physical Volumes to a Volume Group.
Use the vgimport command to complete the process.
The Volume Group /dev/vg01 was not matched with any Physical Volumes.
The Volume Group /dev/vgomni was not matched with any Physical Volumes.
*** LVMTAB has been created successfully.
*** If PV links are configured in the system.
*** Do the following to resync information on disk.
*** #1. vgchange -a y
*** #2. lvlnboot -R
Then depending on your system you may need to run vgimport against some disks in your server