User`s guide

5-9
Configuring the Controller
of the Adaptec Disk Array Administrator screens. Controller 1
and 2 may also be referred to as Controller A and B,
respectively.
■ Failback—The act of returning ownership of controller
resources from a surviving controller to a previously failed (but
now active) controller. The resources include disk arrays, cache
data, and host ID information.
■ Failover—The act of temporarily transferring ownership of
controller resources from a failed controller to a surviving
controller. The resources include disk arrays, cache data, and
host ID information.
■ Kill—One controller can kill the other controller by resetting it
and taking it offline.
■ Other—The opposite controller from the one currently being
used (that is, not the local controller).
■ Ownership—In active-active mode, each controller has
ownership of its own resources. The resources include arrays
and dedicated spares. If one controller fails, the other controller
assumes temporary ownership of its resources.
■ Unkill—When a surviving controller removes the reset from the
other controller, it unkills it. The other controller will reboot and
attempt to come online.
To run two controllers in active-active mode, the following must be
true:
■ You must have two controllers installed in a proper
configuration.
■ Both controllers must be loaded with compatible firmware
levels. The system automatically detects firmware
incompatibilities and halts the boot of the second controller.
■ The operating mode of each controller must be set to active-
active. See Changing the Operating Mode on page 5-10.
■ Host channel 0 of each controller must be set to a different ID
only if you are using a single host interface. If you are using two
host connections, then each controller’s host channel 0 can have
the same ID.