Compaq External RAID Controller & Subsystem Infortrend, Руководство по эксплуатации

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Redundant Controller
10-31
Terminal Interface View of Controller Failure
What will happen when one of the controllers fails?
When one of the controllers fails, the other controller will take over in a few
seconds.
A warning will be displayed that a "SCSI Bus Reset Issued" for each of the
SCSI channels.
In addition, there will be an alert message that reads "Redundant Controller
Failure Detected."
Users will be notified by audible alarm.
After a controller takes over, it will act as both controllers. If it was the
Primary controller that failed, the Secondary controller becomes the Primary
controller. If the failed controller is replaced by a new one later, the new
controller will assume the role of the Secondary controller.
NOTE:
• Some operating systems (SCO, UnixWare, and OpenServer, for example) will not
attempt to retry accessing the hard disk drives while the controller is taking over.
10.3.3 When and How Is the Failed
Controller Replaced?
Remove the failed controller after the take-over of the "working" controller
has been completed. For a controller with hot-plug capability, all you have
to do is to remove the failed controller.
The new controller has to be pre-configured as the " Secondary Controller ."
(The replacement controller provided by your supplier should have been
configured as the Secondary controller. It is recommended to safety check
the status of the replacement controller before installing it to your redundant
system. Simply attach power to the new controller and configure it as the
"Secondary." When safety check is done, remove the failed controller and
install the replacement controller into its place.)