Hitachi AMS 2100, Hardware Manual

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Hardware components
4–9
Hitachi AMS 2100/2300 Storage System Hardware Guide
Base unit power supplies
As shown in Figure 4-6 , the AMS 2100/2300 has two fully redundant power
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.
Table 4-7: Base Unit Power Supply LEDs
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.
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.