Technical data

2–9
Compaq HSZ80 Array Controller ACS Version 8.3 Maintenance and Service Guide
The following sections cover procedures for replacing both the controller and cache
module, replacing the controller, and replacing the cache module.
CAUTION: In a single-controller configuration, you must shut down the
subsystem before removing or replacing any modules. If you remove the
controller or any other module without first shutting down the
subsystem, data loss may occur.
Replacing a Controller and Cache Module in a
Single-Controller Configuration
If both the controller and cache module need to be replaced, follow the steps in
“Replacing a Controller in a Single-Controller Configuration,” page 2–9, and the
steps in “Replacing a Cache Module in a Single-Controller Configuration,” page
2–13.
Replacing a Controller in a Single-Controller
Configuration
Use the following steps in “Removing the Controller in a Single-Controller
Configuration” and “Installing the Controller in a Single-Controller Configuration” to
replace the controller.
Removing the Controller in a Single-Controller
Configuration
Use the following steps to remove the controller:
1. From the host console, dismount the logical units in the subsystem. If you are
using a Windows NT platform, shut down the server.
2. If the controller is operating, connect a PC or terminal to the controller’s
maintenance port.
If the controller is not operating, go to step 5.