If a command is not working as expected, you can gather diagnostics in the following ways:
-vvvvargument of any command for increasingly verbose levels of output.
If the problem is related to the logical volume activation, set 'activation = 1' in the 'log' section of the configuration file and run the command with the
-vvvvargument. After you have finished examining this output be sure to reset this parameter to 0, to avoid possible problems with the machine locking during low memory situations.
lvmdumpcommand, which provides an information dump for diagnostic purposes. For information, see the
lvmdump(8) man page.
dmsetup info -ccommand for additional system information.
Examine the last backup of the metadata in the
/etc/lvm/backupfile and archived versions in the
Check the current configuration information by running the
.cachefile in the
/etc/lvmdirectory for a record of which devices have physical volumes on them.