Detach the submirrors on the storage array. This array is connected to the controller that you are replacing. Detach the submirrors to stop all I/O activity to this storage array.
For more information, see your Solstice DiskSuite/Solaris Volume Manager or VERITAS Volume Manager documentation.
Replace the controller.
For the procedure about how to replace a storage array controller, see the Sun StorEdge T3 and T3+ Array Installation, Operation, and Service Manual.
Reattach the submirrors to resynchronize the submirrors.
For more information, see your Solstice DiskSuite/Solaris Volume Manager or VERITAS Volume Manager documentation.