Technical data

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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.
Note the following before starting the replacement procedures:
■ The new controller’s hardware must be compatible with the functioning
controller’s hardware. See the product-specific release notes that accompanied
the software release for information regarding hardware compatibility.
■ The software versions and patch levels must be the same on both controllers.
■ The new cache module must contain the same memory configuration as the
module it’s replacing.
Replacing a Controller and Cache Module in a
Dual-Redundant Controller Configuration
Use the following steps in “Removing a Controller and Cache Module in a Dual-
Redundant Controller Configuration” and “Installing a Controller and its Cache
Module in a Dual-Redundant Controller Configuration” to replace a controller and its
cache module.
Removing a Controller and Cache Module in a Dual-
Redundant Controller Configuration
Use the following steps to remove a controller and its cache module.
1. Connect a PC or terminal to the operational controller’s maintenance port. The
controller to which you’re connected is “this controller”; the controller that
you’re removing is the “other controller.”
2. Disable failover with the following command:
SET NOFAILOVER
3. Remove the ESD cover and program card from the “other controller.” Save them
for the replacement controller.