Rear View: Power Supply - IBM System Storage EXP2512 Express Storage Enclosure Installation, User's, And Maintenance Manual

Overtemperature LED (amber)
System error LED (amber)
Hard disk drive activity LED (green)
Hard disk drive status LED (amber)

Rear view: power supply

The two hot-swap power supplies are on the rear of the EXP2500.
Attention:
power supply fails, the power-supply unit must be replaced to reestablish
redundancy. When you replace a failed unit with a new power supply, make sure
that you perform this operation in less than 10 minutes to prevent overheating.
The power-supply controls and connectors are shown in the following illustration.
Release
tab
Release tab
Handle
AC power connector
Note: There is no power switch on the power supply. A power supply is active
when a power cord is connected to it and to a power source.
When this amber LED is lit, it indicates that the EXP2500 is in an
overtemperature condition.
When this amber LED is lit, it indicates that the unit has a fault, such as in
a power supply, ESM, or hard disk drive.
Each hard disk drive has an activity LED. When this green LED is flashing,
it indicates drive activity.
Each hard disk drive has a status LED. When this amber LED is lit
continuously, it indicates a drive failure. When it is flashing, it indicates that
a drive Identify or Rebuild is in progress.
The EXP2500 comes with two installed power supplies. When one
Handle
Press the release tab to the right and rotate the handle downward to
remove the power supply.
Use the handle to install or remove the power supply.
Connect the power cord for the power supply to this connector.
IN
OK
AC power
connector
Chapter 3. EXP2500 controls, LEDs, and power
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