If you attempt to create a clustered server pool using a disk located on a storage device that already contains an OCFS2 file system, the Oracle VM Agent on the server detects the file system and refuses to overwrite it. This is normal behavior and protects you from accidentally setting up two OCFS2 file systems with matching UUIDs on the same disk, leading to instability and unexpected behavior.
If you are certain that the existing OCFS2 file system that is already present on the disk is no longer in use by any other server pool or repository, you can clean the disk by connecting to the Oracle VM Server and issuing the following command:
dd if=/dev/zero of=/dev/mapper/360a98000433468704234786f36394763 bs=1M count=256
Replace
/dev/mapper/360a98000433468704234786f36394763
with the correct path to the disk device where you are creating
the new server pool cluster.
Using dd is data destructive. Make sure you are certain about the disk device name and that the OCFS2 file system that you are deleting is no longer in use. It is advisable to make backups of any data that exists on the disk that you are editing before proceeding. This operation should be performed by a skilled systems administrator.