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Figure A-6
and
controllers when both are active and then again when one
controller has failed.
Host I/O
Host System #1
or Host System #2
HBA#2
Termination
Host System #1
HBA#1
Host I/O
Termination
Figure A-6 Active-Active, Single-Port Mode, Both Controllers Active
Host I/O
Host System #1
or Host System #2
HBA#2
Termination
Host System #1
HBA#1
Host I/O
Termination
Figure A-7 Active-Active, Single-Port Mode, Controller 1 Failed
In the failed-over condition, the active controller will present its
native identity on one host port, and the failed-over controller's
identity on its other host port.
After the controller has failed-over, the user can replace the failed
controller with a new controller, and the arrays will fail-back to the
new controller without intervention. If you want to retry the failed
controller, it's necessary to release the killed status that the
Figure A-7
illustrate the logical function of the
Theory of Controller Operation
Termination
Termination
Termination
Termination
Termination
Termination
A-9
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