Base Unit Power Supplies; Power Supply Status; Power Receptacles - Hitachi AMS 2100 Hardware Manual

Base unit power supplies

As shown in
supplies. If one power supply fails, the other one can supply sufficient power
and cooling to the array until the failed power supply is replaced.

Power supply status

Each power supply has two LEDs on the panel near the power receptacle.
These LEDs indicate the operational status of the power supply, as shown in
Table 4-7.

Power receptacles

Each power supply contains a power receptacle that must be connected to
a working AC power source using the supplied AC power cable.
NOTE: Hitachi Data Systems recommends that each power supply in the
base unit be connected to a different AC source in the rack. If one source
fails, the other source continues to supply power to the other power supply.
This keeps the array running until power is restored to the failed source.
Figure 4-6, the AMS 2100/2300 has two fully redundant power
Table 4-7: Base Unit Power Supply LEDs
Hardware components
Hitachi AMS 2100/2300 Storage System Hardware Guide
Item Description
Ready LED (green).
OFF when the power supply is
not connected to power.
Blinks when the corresponding
power receptacle is connected
to a working AC outlet, and is

running the power on self test
(POST).
ON when the unit is
operational. even if the AMS
2100/2300 array is not turned
on.
Alarm LED (red). This LED
indicates that the power supply
has failed. Although the other
power supply can supply
sufficient power and cooling for
the array, Hitachi Data Systems
recommends that you replace

the failed power supply as soon
as possible. See the Hitachi
AMS 2000 Family Storage
System Service Guide for
instructions.
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