[root@ifcdhcppool-172-23-143-171 ~]# dmraid -x ddf1_RAID0_3

About to delete RAID set ddf1_RAID0_3

WARNING: The metadata stored on the raidset(s) will not be accessible after deletion
Do you want to continue ? [y/n] :y
ERROR: Raid set deletion is not supported in "ddf1" format
[root@ifcdhcppool-172-23-143-171 ~]#