Chapter 5: Subsystem Maintenance and Upgrading

5.2. Replacing Controller Module Components

5.2.1 Overview

The controller module consists of the following components:

DIMM Module

The DIMM module can be replaced when a DIMM module

 

fails or if a larger capacity DIMM is required.

BBU

If the BBU has lost its ability to hold electric charge, replace it

 

with a certified module. With the new BBU that comes with

 

ASIC400 models, an EEPROM is implemented and that

 

system administrators will be notified by system events when

 

the approximate one-year life expectancy is reached.

WARNING!

1.The BBU is hot-swappable and can be independently swapped from the controller. However, the BBU is installed into a metal bracket on the controller module. When the controller is removed, the BBU is also removed.

2.It is recommended to remove the BBU before handling the controller because once a controller is removed from chassis, BBU will discharge to support the cache memory. If you replace a DIMM module with supplied voltage, damage may occur.

5.2.2Notes on Controller Module Maintenance

The controller module contains a DIMM module for cache buffer. When replacing the controller module, the DIMM module can be removed and used on the replacement controller if they are known to be good.

When replacing the controller module, you must remember that the controller board is one of the most sensitive components in the EonStor A16E subsystem. All previously stipulated safety precautions (see Chapter 2) must be strictly adhered to. Failure to adhere to these precautions can result in permanent damage, resulting in timely delays.

For your own safety and that of the subsystem, make sure that no power is being supplied to the system prior to replacing the controller module.

5.2.3 Removing the Controller Module

To remove the controller module:

Replacing Controller Module Components

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