Match v7000 presented volume as a mdisk on SVC
Its really hard to play with storage when production data on it
To whom need to be remove , unmap volumes which presented to SVC via v7000 need to be know that UID numbers of mdisks on SVC and v7000 is same but with little modification.
These are volume UIDs on v7000
These are mdisk
You can see that SVC add additional 00000 behind the value which come from v7000 UID
You can easily and safely unmap if you need from v7000 to take the space back