Troubleshooting Disk Space
Running out of disk space can have a severe impact on the Uyuni database and file structure which, in most cases, is not recoverable. You can recover disk space by removing unused custom channels and redundant database entries before you run out of space entirely.
For instructions on how to delete custom channels, see administration:channel-management.adoc.
spacewalk-data-fsckcommand to list any redundant database entries.
spacewalk-data-fsck --removecommand to delete them.