Compaq Confidential – Need to Know Required
Writer: Bob Young Project: RAID Array 3000 Controller Shelf Hardware User’s Guide Comments:
Part Number: EK-SMCPQ-UG. D01 File Name: e-ch4 Second Controller Option.doc Last Saved On: 12/4/00 1:08 PM
Chapter
4
Second Controller Option
This chapter describes how to install a second RAID controller in the RAID
Array 3000 Controller Shelf (controller shelf). The second controller option
adds a fail/safe feature to your storage subsystem. The chapter also contains a
procedure describing how to configure the subsystem for dual-controller
operation when only one serial port is available on the host.
The controller option adds a second (redundant) controller unit to your
subsystem to preserve the integrity of data should the first controller
malfunction. The second controller is installed directly below the existing
controller in the bottom controller slot of the controller shelf.
The installation procedure consists of adding two Single Inline Memory
Module (SIMM) to the redundant controller and, depending on the option kit
you are installing (see inventory below), one or two SIMM modules to the
existing controller. Following the memory upgrade, you must upgrade the
firmware in both controllers, seat the devices in their respective controller
slots, and configure the subsystem to accommodate a redundant controller.