Install Battery Backup Module - D-Link DSN-6120 User Manual

Connector, LED and button description:
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2.4 Install battery backup module

To install the IP SAN storage with a battery backup module, please follow the procedure.
Gigabit ports (x4).
LED (from left to right)
Controller Health LED:
Green  Controller status normal or in the booting.
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Red  Other than above status.
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Master Slave LED: (only for DSN-6120)
Green  Master controller.
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Off  Slave controller.
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Dirty Cache LED:
Orange  Data on the cache waiting for flush to disks.
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Off  No data on the cache.
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BBM LED:
Green  BBM installed and powered
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Off  No BBM
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BBM Status Button:
When the system power is off, press the BBM status button,
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if the BBM LED is Green, then the BBM still has power to
keep data on the cache. If not, then the BBM power is ran
out and cannot keep the data on the cache anymore.
Management port.
Console port.
RS 232 port for UPS.
SAS JBOD expansion port.
Power switch.
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