We have planned to move 2 * 300GB DSMK4 shelves from unused FAS 3050( hardware based ownership) to a new controller . We have destroyed the aggregate and zeroed the disks as spare.
The steps to be followed are
1.CF disable in the old controller ( since not in use)
2.Halt the controller
3.Power down the shelf manually
4.Unplug it & plug it new controller
I am so skeptical, the disks should have to come up fine with out tagging of old serial numbers>?
Solved! See The Solution
Yes, mailbox holds information about current state of disks (e.g. which head is current owner of disks), so it makes sense to clear this information when head identity changes.