You must use the command-line interface (CLI) to delete a managed mode virtual disk.
The svctask rmvdisk command deletes an existing managed mode virtual disk. All data on the virtual disk is deleted.
The extents that make up the virtual disk are returned to the pool of free extents that are available on the managed disk group. If any IBM TotalStorage Metro Mirror for SAN Volume Controller, FlashCopy or host mappings still exist for this virtual disk, the delete fails unless the force flag is specified. When the force flag is specified, any mappings that remain are deleted and the virtual disk is deleted.
If the virtual disk is currently migrating to image mode, then the delete will fail unless the force flag is specified. When the force flag is specified, the migration is halted and the virtual disk is deleted. Before you issue this command ensure that the virtual disk (and any data that resides on it) is no longer required.