Installing an HSZ80 Array Controller

This document outlines the procedures for replacing an HSZ80 Array Controller in two main configurations: dual-redundant and single controller.

General Safety and Prerequisites:

• Always wear an Electrostatic Discharge (ESD) wrist strap connected to a verified earth ground to prevent damage.
• A terminal connection to the operational controller's maintenance port is often required.

1. Replacing a Controller in a Dual-Redundant Configuration:

• Removal Process:

  1. Connect a terminal to the operational controller.
  2. Disable failover using SET NOFAILOVER.
  3. Run the RUN FRUTIL utility.
  4. Navigate FRUTIL menus to choose "Replace or remove a controller or cache module," then "Other controller module" to target the controller being removed.
  5. Confirm removal and wait for FRUTIL to quiesce device ports.
  6. Remove the ESD cover and program card (save for the new controller).
  7. Disconnect trilink connectors (but not bus cables).
  8. Disengage retaining levers and physically remove the controller, placing it in an antistatic bag. FRUTIL will prompt if you have a replacement.

• Installation Process:

  1. If proceeding directly from removal, FRUTIL may continue the process. Otherwise, connect terminal and run RUN FRUTIL.
  2. Navigate FRUTIL menus to "Install a controller or cache module," then "Other controller module" for the new controller.
  3. Confirm installation and wait for FRUTIL to quiesce device ports.
  4. Insert the new controller (without its program card initially) and engage retaining levers.
  5. Connect trilink connectors.
  6. Hold the reset button while inserting the program card, then release the button and replace the ESD cover.
  7. Note: If the new controller was previously used, its old configuration may need to be purged.

2. Replacing a Controller in a Single Controller Configuration:

• Removal Process:

  1. Dismount logical units from the host (and shut down PC if Windows NT).
  2. Connect a terminal to the controller's maintenance port (if operating).
  3. Optionally run FMU for failure codes.
  4. If operating, shut down the controller using SHUTDOWN THIS_CONTROLLER (be aware of potential cache data loss).
  5. Turn off power to the subsystem.
  6. Remove the ESD cover and program card (save for the new controller).
  7. Disconnect trilink connectors (but not bus cables) and the terminal.
  8. Disengage retaining levers and physically remove the controller, placing it in an antistatic bag.

• Installation Process:

  1. Insert the new controller and engage retaining levers.
  2. Connect trilink connectors and the terminal to the maintenance port.
  3. Restore power to the subsystem.
  4. Hold the reset button while inserting the program card, then release the button and replace the ESD cover.
  5. Note: If the controller was previously used, purge its old configuration using SET THIS_CONTROLLER INITIAL_CONFIGURATION.
  6. Install any necessary patches using CLCP.
  7. Mount logical units on the host (restart PC if Windows NT).
  8. Set the subsystem date and time.