HP XP P9500 Storage - Manual (Page 83)

It is not possible to delete LDEVs directly from the copy group.
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Use cases
The following shows use cases that can be deleted LDEVs from the device group forming a
copy group.
◦ Deleting an LDEV (simplex volume) from a device group forming a copy group.
◦ Deleting an LDEV (paired volume) from a device group forming a copy group.
Copy group deletion
Deleting a copy group by specifying a defined copy group.
LDEV grouping function 83