sorry - I might have make my point not clear enough.
I don't use RAIDs that are directly connected to my DSS, but the DSS imports the FC LUNs from standalone RAID, like Infortrend ones. So the units on the DSS would show up to be from only one single drive.
So to the DSS it would seem that a connected drive has grown - well maybe it's not too far away from a RAID set that grows. Maybe just hitting PV resize will do it…
Yes, use the PV Resize then after the reboot go to the Volume and add the new unit to the existing VGxx and you will see the in the logical volume manager the new added space.