Specifications

Chapter 5 Subsystem Maintenance and Upgrading
5.2. Replacing Controller Module Components
5.2.1 Overview
The controller module consists of the components shown below:
Component Maintenance Procedures
DIMM Module The DIMM module can be replaced when the DIMM
module fails or if a larger capacity DIMM module is
required.
BBU Module The BBU can be installed after the initial installation
procedure or replaced if a previously installed BBU
module is faulty or fails to hold its charge.
Controller Module If the controller module in a single controller model fails,
it is necessary to power the system down and replace the
controller.
5.2.2 Notes on Controller Module Maintenance
 The controller module contains a DIMM module and a BBU module. When
replacing the controller module, these components can be removed and used on the
new controller module if they are functioning normally.
 When replacing the controller module, you must remember that the controller board
is one of the most sensitive components in the 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 to the controller board, resulting in
timely delays.
Replacing Controller Module Components 5-3