IBM TotalStorage DS300 Best Practices Manual page 58

LED symbol Controller problem indicator
System Amber XScale (Processor) DIMM Fault
DIMM! LED is lit.
When this LED is lit, it indicates that the
XScale memory has failed. This is the
result of one the following conditions:
Cannot read the DIMM configuration
data
Nonrecoverable ECC failure
Cache DIMM! Amber Cache DIMM Fault LED is lit.
When this LED is lit, it indicates that the
cache memory has failed. This is based on
one of the following conditions:
Cannot read the DIMM configuration
data \
Nonrecoverable ECC failure
Amber Controller Not Ready LED is lit.
When this LED is lit, it indicates that the
controller is not ready.
ETH0 Link Green GbE Link Status LED is off.
When this LED is lit, it indicates that the Gb
Ethernet link is operational.
ETH0 TX/RX Green GbE Activity LED is off.
This LED will flicker continuously between
on and off. When this LED is lit, it indicates
that data packets are being transmitted or
received.
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IBM TotalStorage DS300 and DS400 Best Practices Guide
Action
Replace the controller.
Replace the DIMM 256 MB
If the DIMM replacement does not fix
the problem, replace the controller.
This LED might be lit because the
controller did not finish POST. Contact your
IBM support representative to attempt to
recover the controller.
If this LED is off, perform the following
actions:
Check the status on the Ethernet
switch.
Replace the Ethernet cable.
Switch the Ethernet cable to another
port on the same switch in the same
network segment.
If this LED is off, then no data is being sent
or received. Establish a connection and
start passing data.