Chapter 7. LVM Troubleshooting
This chapter provide instructions for troubleshooting a variety of LVM issues.
7.1. Troubleshooting Diagnostics
If a command is not working as expected, you can gather diagnostics in the following ways:
- Use the
-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.
- Run the
lvmdumpcommand, which provides an information dump for diagnostic purposes. For information, see the
lvmdump(8) man page.
- Execute the
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
- Check the
.cachefile in the
/etc/lvmdirectory for a record of which devices have physical volumes on them.