I've seen people do this without problems, but I've not had to do it yet myself. Having the disks unassigned is a good idea since you'll want them unowned when you add them to other heads. If you can afford to do it while in takeover mode that probably couldn't hurt.
Let us know how it goes. I'm under the impression this works, but is unsupported from netapp eng still.
-Blake
On Thu, Jun 2, 2011 at 6:03 AM, Steve Losen scl@sasha.acc.virginia.edu wrote:
Hello Toasters,
We have a FAS3170 HA pair with some SATA disk shelves (AT-FCX) attached to the end of a chain where none of the disks are in use (all are spares, all have ownership assigned). We are running ONTAP 8.0.1.
The chain is singly attached to both controllers, i.e., the shelf "A" modules are chained to a single FC adapter on one controller and the shelf "B" modules are chained to a single FC adapter on the other controller.
The shelves we want to remove are at the far end of the chain. Essentially we want to undo the result of a hot shelf add without downtime.
Is it possible to hot remove these shelves? Would it help to "un-own" the disks first?
I suppose this could be done using CF takeover/giveback but that might be too disruptive.
Steve Losen scl@virginia.edu phone: 434-924-0640
University of Virginia ITC Unix Support