High-Density Expansion Unit Power Supply - Hitachi AMS 2100 Hardware Manual

High-density expansion unit power supply

As shown in
redundant power supplies for each section in the unit (total of four power
supplies). If one power supply in a section fails, the other one can supply
sufficient power and cooling to the section 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
Figure 4-32.
Figure 4-32: High-density Expansion Unit Power Supply Components
Figure 4-31, the high-density expansion unit has two fully
Hardware components
Hitachi AMS 2100/2300 Storage System Hardware Guide
Item Description
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. Contact Hitachi
Data SystemsTechnical
Support for instructions.
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 poser supply is
operational. even if the AMS
2100/2300 array is not turned
on.
Power Receptacle (see next

page)

Lock Lever
4–39