Technical data

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Compaq HSZ80 Array Controller ACS Version 8.3 Maintenance and Service Guide
Replacing a Cache Module in a Single-
Controller Configuration
Use the following steps in “Removing the Cache Module in a Single-Controller
Configuration” and “Installing the Cache Module in a Single-Controller
Configuration” to replace the cache module.
Removing the Cache Module in a Single-Controller
Configuration
Use the following steps to remove the cache module:
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.
3. Run FMU to obtain the last failure codes, if desired.
4. Shut down the controller with the following command:
SHUTDOWN THIS_CONTROLLER
When the controller shuts down, its reset button and the first three LEDs are lit
continuously.
CAUTION: ESD can easily damage a cache module or a DIMM. Wear a
snug-fitting, grounded ESD wrist strap.
5. Disable the ECB by pressing the battery disable switch until the status light stops
blinking—about five seconds.
CAUTION: The ECB must be disabled—the status light is not lit and is
not blinking—before disconnecting the ECB cable from the cache
module. Failure to disable the ECB could damage the cache module.
6. Disconnect the ECB cable from the cache module.