Compaq Infortrend manual When and How Is the Failed Controller Replaced?

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.

10.3.3When 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.)

Redundant Controller 10-31