Move the NetBackup database from any btrfs file systems
Installation or upgrade of the NetBackup database on a btrfs file system is not supported. If the NetBackup database resides on a btrfs file system, move the database to a supported file system (such as ext4 or xfs) before you start the upgrade. The database files reside on the primary server in the directories under /usr/openv/db. More information about moving the database before an upgrade is available. See Preinstall procedure for upgrading to NetBackup 11.2.