Galaxy GHDX4 RAID iSCSI-SAS/SATA InstaHardware Reference Manual
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bay. Carefully push the controller until you feel the contact
when the board edge connectors are being mated to the
backplane. Do not use force. If unusual contact resistance is
felt, try it again. Use the ejection levers to secure it into the
chassis when the controller is almost fully inserted.
When the controller is inserted with the levers at its lowest
position, notches on the levers should properly clinch to the
round anchor pins on the interior walls of module bay. You
may then pull the lever upward to secure the controller into
module bay.
Step 7. Secure the controller module into the subsystem by fastening
the screws through holes underneath each ejection lever.
Replacing a Faulty BBU
The BBU 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
due to power outages.
Fault Conditions:
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 CBM status LED to light up:
1. The temperature sensor embedded with the subsystem’s charger
circuit reports a temperature reading exceeding the preset
threshold. The charger circuits will enter a low-power and self-
protection state.
2. A BBU module has been charged for over twelve (12) 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.
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.
