Adding Drives to CX300

Hello everyone!

I have two CX300 SAN devices and would like to expand one of them. One is under maintenance and one is not. As such I would like to take the drives out of the off-maintenance device and put them into the on-maintenance one to expand the storage.

I was just wondering if this is possible and if so how I would go about decomissioning the drives so they can move without a problem.