Troubleshooting Not Enough Disk Space
Check the available disk space before you begin migration.
We recommend locating /var/spacewalk and /var/lib/pgsql on separate XFS file systems.
When you are setting up a separate file system, edit /etc/fstab and remove the /var/lib/pqsql subvolume.
Reboot the server to pick up the changes.
To get more information about an upgrade problem, check the migration log file.
The log file is located at /var/log/rhn/migration.log on the system you are upgrading.