Galaxy Raid GHDX2-2430S-16U4D Installation and Hardware Reference Manual
1-8
Subsystem
Components
1.3.5 DIMM Module
The controller module comes with a pre-installed 256MB capacity or above
DDR RAM DIMM module and can support capacities up to 2GB. The
DIMM module is installed in an easily accessed location on the controller
board. If the need should arise for replacing the DIMM module, you will
have to shut down the subsystem and remove the controller in order to
access the DIMM socket. Details on upgrading/replacing the DIMM
module can be seen in
Chapter 5
.
1.3.6 BBU
Figure 1-9: BBU Module
PN:
GAL-9273CBTE (optional: 4 cells)
The Li-ION BBU module, as shown above, is an optional item for the
subsystem. The BBU can sustain cached data for days during a power
failure. The use of a BBU is highly recommended in order to ensure data
integrity. If power outage occurs, the BBU supplies power to sustain the
unfinished writes in cache memory. The BBU module is hot-swappable.
New Feature:
The battery cell pack listed above comes with an EEPROM to record the
date of installation; and when the one-year life expectancy is reached (by
checking against the real-time-clock), system administrators will be notified.
In accordance with international transportation regulations, the BBU is only
charged to between 35% and 45% of its total capacity when shipped. After
powering on the subsystem (see
Section 4.1
) the BBU will automatically
start charging its battery cells. It usually requires approximately seven (7)
hours for the battery to be fully charged. If the battery is not fully charged
after seven (7) hours, a problem might have occurred with the BBU and you
should contact your subsystem vendor for a replacement. While charging the
battery, the LED on the BBU will flash slowly. You can check battery
charge using the RAIDWatch management software or firmware
configuration utility.
WARNING!
The BBU is hot-swappable; however, when the controller module is
removed from the subsystem, the BBU is also removed. Do not remove
