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♦
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.
♦
Drive: All models come with sixteen (16) SATA drive channels that
are interfaced through board-to-board connectors to subsystem back
plane. (NOTE: Drive interfaces are not accessed through the
controller module rear panel.)
1.2.5 DIMM Modules
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 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.
1.2.6 Battery Backup Unit (BBU)
PN: IFT-9273CBT-E (4 cells)
An optional, separately purchased Li-ION battery backup unit (BBU) (see
Figure 1-10) can sustain cache memory after a power failure. If you
purchased a BBU, it will be installed in the middle of the controller module
in the rear subsystem chassis. Please refer to Section 2.7 for installation
instructions.
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 4.4) the BBU must
be charged to its full capacity. It normally requires approximately seven (7)
hours for the battery to be fully charged. If the battery is not fully charged
after seven (7) 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 fifth LED on the rear panel
of the controller module will flash slowly. (See Chapter 3.2.8 for details on
the LED indicators.) You can check the status of the battery's charge via
RAIDWatch or the firmware.
AR3016G Components
Figure 1-10: BBU
AR3016G
1-9
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