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Galaxy A16F-R2422 Installation and Hardware Reference Manual
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1.2.6
DIMM Module
The controller module comes with a pre-installed 512MB capacity or above
DDR RAM DIMM module and can support capacities up to 2GB. The
DIMM module is placed in an easily accessed location on the controller
board. However, when the DIMM module is being changed, the controller
module must be removed from the subsystem chassis.
1.2.7
Battery Backup Units (BBUs)
PN: GAL-9273CBTC
Two (2) standard Li-ION battery backup units (BBUs) (see Figure 1-11) are
pre-installed in the A16F-R2422 and can sustain cache memory after a
power failure. Each BBU is installed on the upper left side of the controller
module in the rear subsystem chassis.
In accordance with international transportation regulations, the BBU is only
charged to between 35% and 45% of its total capacity when shipped.
Therefore, after powering on the subsystem (see Section 4.5) the BBU must
be charged to its full capacity. It normally requires approximately twelve
(12) hours for the battery to be fully charged. If the battery is not fully
charged after twelve (12) hours, there is a problem with the BBU and you
should contact your subsystem vendor immediately. While the battery is
being charged, the LED on the BBU rear panel and the fGALh LED on the
rear panel of the controller module will flash slowly. (See Section 3.2.7 for
1-10
If the controller that you connect to has failed, you may have to
disconnect the serial cable from the failed controller and connect it
to the surviving controller.
LED indicators: Each controller board rear panel comes with six
(6) LED indicators. Please refer to Chapter 3 for information on
how to monitor your subsystem using the LED indicators.
Levers: Two (2) levers located on the sides of the controller board
rear panel provide easy controller module installation and secure
the controller module in place.
Figure 1-11: BBU
Introduction
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