IBM System Storage EXP2512 Express Storage Enclosure, Installation, User'S, And Maintenance Manual

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The LEDs on the ESM are shown in the following illustration.
SAS link
LEDs
Power-on
LED (green)
ESM error
LED (amber)
SAS link
LEDs
Locator
LED (blue)
Ethernet
speed LED
(green) Ethernet
link LED
(green)
Power-on LED (green)
When this green LED is lit, it indicates that the ESM is receiving power.
ESM error LED (amber)
When this amber LED is lit, it indicates that the ESM unit has a fault.
Locator LED (blue)
This blue LED can be lit by the systems-management software on the RAID
controller that is connected to the EXP2500, to aid in visually locating the
ESM.
SAS link LED (green)
When this green LED is lit, it indicates that two of the x4 SAS links through
the SAS cable are successful.
Ethernet link LED (green)
When this green LED is lit, it indicates that the Ethernet port link is good.
Ethernet speed LED (green)
When this green LED is lit, it indicates that the Ethernet port is operating at
100 Mbps and when this LED is off, the Ethernet port is operating at 10
Mbps.
EXP2500 power features
This section contains instructions for powering on and off the EXP2500 in normal
and emergency situations.
If you are powering on the EXP2500 after an emergency shutdown or power
outage, see “Turning on the EXP2500 after an emergency” on page 24.
Powering on the EXP2500
To power-on the EXP2500 for the initial startup, complete the following steps:
1. Check the system documentation for all the hardware devices that you want to
turn on and to determine the correct power-on sequence.
2. Make sure that:
a. All SAS and Ethernet cables are connected correctly.
b. All hard disk drives are locked securely in place.
c. Both power cords are connected to the power supplies on the rear of the
EXP2500 and to properly grounded electrical outlets.
Chapter 3. EXP2500 controls, LEDs, and power
21