Appendix D. Recovering Volume Groups

When the ODM entries for a volume group are corrupted, you may notice one of the following symptoms:

• lsvg, lslv and/or lspv commands fail.
• You cannot change the size of file systems.
• The system cannot find volume groups or device IDs.
• The output of lsvg -l VGname contains ?'s in some fields or some fields are blank.

If the Object Data Manager (ODM) entries for a volume group are corrupted, use the shell script to reinitialize the ODM entries for the rootvg volume group. By modifying the shell script, you can also reinitialize a user-defined volume group. Note that it is not necessary to reboot after running this script.

See the following to recover volume groups:

• Reinitializing the rootvg Volume Group
• Reinitializing a User-Defined Volume Group
• Restoring the Original Version of the Object Data Manager

  Note: Note that the $$ in the lines of the shell script , for example:

  cp /etc/objrepos/CuAt /etc/objrepos/CuAt.$$

Indicate the process ID (PID) of the shell script, creating a unique file name. If after running the script you can successfully perform the commands that had previously failed, remove the Cu*.$$ files in /etc/objrepos (where $$ is a PID).

Go back to the Symptom Index.