IBM TotalStorage DS300 Best Practices Manual page 53

Table 3-3 DS300 front panel LEDs
DS300 problem indicators
Green Power LED is off.
When this LED is off, it indicates that DC power is
not present, or that the power supply or the LED
itself has failed. A power LED is also on the power
supply.
Blue Locator LED is lit.
When this LED is lit, it has been remotely lit by the
ServeRAID Manager program (running on the
system that is the management station for the
storage subsystem), to aid in visually locating the
storage subsystem.
In a dual controller system, when this LED is lit, it
can possibly mean that one controller is down.
Amber Storage Subsystem Fault LED is lit solidly.
If the fault LED is lit continuously (not flashing),
there is a problem with the storage subsystem. Use
the ServeRAID Manager program to diagnose and
repair the problem.
One or more of the following conditions might exist:
Power supply fault
Fan fault
Overtemperature fault
RAID controller module fault
Battery fault
Cache DIMM fault
XScale DIMM fault
Disk drive fault
Turned ON through SES control page
Amber Storage Subsystem Fault LED is lit flashing.
When this LED is lit flashing, it indicates that an
illegal hardware configuration is detected.
Green Hard disk drive activity LED is off.
No drive activity is being detected.
Action
Check Power Supply LEDs. Refer to power supply
LEDs table.
Note: To remove all electrical power from the
storage subsystem, you must disconnect the power
cord from the electrical outlet.
None required
Note: The LED can be turned off by selecting
Identify Enclosure from the ServeRAID Manager
program.
Telnet to the administration port of the surviving
controller and enable the alternate controller with
the following command:
controller peer enable
1. Check the LEDs for all components on
enclosure (disk drives, power supplies,
controllers) and follow the solution instructions
provided for the respective illuminated LED.
2. If no other fault LED is on, replace the
controller:
3. If replacing the controller does not resolve the
issue, replace the chassis/backplane assembly.
Verify that the RAID controller and power supply are
both installed in the slot A side.
Note: This should only occur with the DS300 type
1701 model 1RL.
Start your application and verify that the activity
LED flashes as the drive is accessed.
Chapter 3. Components overview
35