Galaxy Raid GHDX2-2430S-16U4D Installation and Hardware Reference Manual
5-8
Replacing a Faulty BBU
Figure 5-6: Removing the DIMM Module
Step 5.
Insert the replacement module
. Align the new DDR RAM DIMM
module with the DIMM socket and gently (but firmly) push it in.
The white clips on either side of the slot should automatically close
and lock the DIMM module in place. (See
Figure 5-6
)
Step 6.
Install the controller module and BBU module (if applied).
Once
the new DIMM module has been installed, install the controller
module back in its original location. (See
Section 5.2.3
)
5.4 Replacing a Faulty BBU
The BBU is an optional item for the subsystem that can sustain cache
memory in the event of a power failure or in the unlikely event of failing
both PSUs. The BBU provides additional data security and helps minimize
the chance of losing data during power outages.
A BBU consists of a metal bracket, battery cell pack, and a PCB board that
connects to the controller module. Each BBU is secured to the subsystem
using retention screws. Please read the BBU handling precautions below
before proceeding with the replacement procedure.
A BBU failure can result from the following:
1.
A BBU has lost its ability to hold electrical charge. This may be the
case after the battery cells have been recharged for many times
regardless of how long the module has been used. Therefore, a stable
power source is important for system operation.
2.
The charger circuitry implemented with the controller has failed.
There are other conditions that might trigger the BBU fault events and
trigger the BBU fault LED:
1.
The temperature sensor embedded with the subsystem’s charger circuit
reports a temperature reading exceeding 35 degree Celsius. The
charger circuits will enter a low-power and self-protection state.
2.
A BBU module has been charged for over seven (7) hours. A timer is
embedded with the charger. When this occurs, the charger will enter a
timer fault state. The fault condition usually occurs with a brand new
BBU or with a totally discharged BBU. Charging will resume
automatically if you remove and re-install the BBU module.
5.4.1 BBU Warnings and Precautions
Install or replace the BBU with BBUs supplied by your Galaxy
vendors only. Use of battery cells provided otherwise will void
our warranty.
