HSZ10-AA Controller Site Prep Guide

This "HSZ10-AA Controller Site Preparation Guide" (Order Number EK-HSZ10-IN-B01, May 1993) provides instructions for the installation, replacement, and configuration of the HSZ10-AA disk array controller.

Intended for customers, system administrators, and service engineers, the guide covers:

• Product Description: The HSZ10-AA is an intelligent SCSI disk array controller supporting RAID levels 0, 1, 3, and 5. It offers fast/wide/differential SCSI-2 host support and manages 5 drive channels. It's typically factory-installed in a BA350-EA shelf, with a single controller placed in the "Controller 1" slot.

• SCSI ID Settings:

  • Array Channel: The controller's SCSI ID on the drive bus is automatically determined by its physical slot (ID 7 for Controller 1, ID 6 for Controller 2).
  • Host Channel: The SCSI ID (default 0, configurable from 0-15) is set using switch SW1 on the controller board, which requires the controller to be removed from the shelf for adjustment. A note advises restricting IDs to 0-7 when used with 8-bit devices.

• Replacement Procedures: Detailed steps for replacing an HSZ10-AA controller, including powering down the subsystem, removing cables and captive screws, safely handling the board, setting the replacement controller's SCSI ID to match the original, re-installing, and verifying proper operation via LED indicators (Green Power, Heartbeat, and an LED value of 5 for a fully functional state).

• Adding an Additional Controller: Instructions for installing a second controller into the "Controller 2" slot. It clarifies that an additional controller will operate in a passive state, as redundant controller configurations were not supported by the host adapter/operating system environments at the time of publication.