Compaq EK-SMCPO-UG. C01 manual Second Controller Option

Chapter 5

Second Controller Option

This chapter describes how to install a second RAID controller in the RAID Array 3000 pedestal. 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 RAID Array 3000 pedestal (see Figure 5-1).

The installation procedure consists of adding two Single Inline Memory Modules (SIMM) to the redundant controller and, depending on the option kit you are installing (see “Second controller option kit in this chapter), 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.