IBM System Storage EXP2512 Express Storage Enclosure, Инструкция по установке, использованию и обслуживанию

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The LEDs on the power supply are shown in the following illustration.
OK
IN
AC power in
LED (green) DC power
LED (green)
Fault LED
(amber)
AC power LED (green)
When this green LED is lit, it indicates that the EXP2500 is receiving ac
power.
DC power LED (green)
When this green LED is lit, it indicates that the EXP2500 is turned on and is
supplying both 5-volt and 12-volt dc power to the EXP2500.
Fault LED (amber)
When this amber LED is lit, it indicates that a power supply or fan has
failed or that a redundant power supply is not turned on.
OK to remove LED (blue)
Not in use.
Rear view: ESMs
The connectors on the ESM are shown in the following illustration.
SAS out
connector SAS in
connectors Service
port Ethernet
port
SAS out connector
Connect a SAS cable to this connector and to the SAS In ( ↑ ) connector of
another EXP2500.
Service port
This port is reserved for service technicians.
Ethernet port
The Ethernet port is used for remote management and diagnostics.
Note: Do not connect the Ethernet port to the public network.
SAS in connector
Connect a SAS cable to this connector and to an IBM SAS RAID controller
or the SAS Out (
↓ ) connector of another EXP2500 enclosure.
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System Storage EXP2512 and EXP2524: Installation and Maintenance Guide