Specifications

2–48 Compaq StorageWorks HSG80 Array Controller ACS Version 8.5 Maintenance and Service Guide
14. Enable failover and re-establish the dual-redundant configuration with the following
command:
SET FAILOVER COPY=THIS_CONTROLLER
This command copies the subsystem configuration from “this controller” to the “other
controller.”
15. Disconnect the PC or terminal from the controller maintenance port.
Replacing an EMU
Use the following steps in “Removing an EMU” and “Installing an EMU” to replace the
EMU.
CAUTION: ESD can easily damage an EMU. Wear a snug-fitting, grounded ESD wrist
strap.
Removing an EMU
1. From a host console, stop all host activity and dismount the logical units in the
subsystem. If using a Windows NT platform, shut down the server.
2. Connect a PC or terminal to the maintenance port of an operational controller.
3. Shut down the controllers.
■ In single-controller configurations, shut down “this controller” with the following
command:
SHUTDOWN THIS_CONTROLLER
■
In dual-redundant controller configurations, shut down the “other controller” first,
then shut down “this controller” with the following commands:
SHUTDOWN OTHER_CONTROLLER
SHUTDOWN THIS_CONTROLLER
When the controllers shut down, the reset buttons and the first three LEDs are lit
continuously (see Figure 2–4). Receiving this indication can take several minutes,
depending on the amount of data that needs to be flushed from the cache modules.
4. Turn O
FF all AC input boxes for each enclosure (see Figure 1-1, ).
5. Disengage both retaining levers and remove the EMU (see Figure 2–9, on page
2–17).