Specifications

2–8 Compaq StorageWorks HSG80 Array Controller ACS Version 8.5 Maintenance and Service Guide

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.

Figure 2–4. Identifying the controller reset button and first three LEDs

4. Turn off the power to the subsystem.

CAUTION: If you are shutting down the controller for longer than one day, perform the

steps in the next section, “Disabling and Enabling the External Cache Batteries” to

prevent the write-back cache batteries from discharging.

Disabling and Enabling the External Cache Batteries

Use the following steps to disable the ECBs:

NOTE: The ECB might contain one or two batteries, depending on the configuration.

1. Press and hold the battery disable switch labeled SHUT OFF (see Figure 2–5) for

approximately five seconds. The ECB status LED will flash once and then shut off.

2. Repeat step 1 for the second battery in dual ECB components and for both ECB 1 and

ECB 2, if appropriate.

The batteries are no longer powering the cache module.

Reset button

First three LEDs

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CXO6991A