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

Expansion unit power supply

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

As shown in
the power receptacle. These LEDs indicate the operational status of the
power supply, and are described in
Item

Lock Lever (2 places)
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

expansion array, Hitachi Data Systems recommends that you replace the power
supply as soon as possible. See the
System Service Guide
Ready LED (green). on each power supply blinks when the corresponding power

receptacle is connected to a working AC outlet, even if an AMS 2100/2300 array
is not turned on; otherwise, the LED is OFF.

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.
4–30
Figure 4-20, the expansion unit has two fully redundant power
Figure 4-22, Each power supply has two LEDs on the panel near
Figure 4-22: Expansion Unit Power Supply Components
Table 4-22: Expansion Unit Power Supply Components
Hardware components
Hitachi AMS 2100/2300 Storage System Hardware Guide
Table 4-22.
Description
Hitachi AMS 2000 Family Storage
for instructions.