582 IBM Flex System V7000 Storage Node Introduction and Implementation Guide
13.2.3 Power-on self-test
When you turn on the system, the node canisters perform self-tests. A series of tests is
performed to check the operation of components and some of the options that have been
installed when the units are first turned on. This series of tests is called the power-on self-test
(POST).
If a critical failure is detected during the POST, the software is not loaded and the fault LED is
illuminated. To determine if there is a POST error on a canister, go to 13.2.1, “Understanding
the system state using the control enclosure LEDs” on page 573 and 13.2.2, “Understanding
the system state using the expansion enclosure LEDs” on page 579
When the software is loaded, additional testing takes place, which ensures that all of the
required hardware and software components are installed and functioning correctly.
Expansion
enclosure fault
Amber This LED is not used and it is always off.
SAS port
status
Amber OFF – There have been no faults or conditions detected by the
expansion canister on the SAS port or down stream device connected
to the port
ON SOLID – There has been a fault condition isolated by the
expansion canister on the external SAS port
SLOW BLINK – The port has been disabled and will not service SAS
traffic
BLINK – One or more of the narrow ports of the SAS links on the wide
SAS port link have failed, the port is not operating as a full wide port
SAS port
activity
green OFF – Power is not present or there is no SAS link connectivity
established
ON SOLID – There is at least 1 active SAS link in the wide port
established and there is no external port activity
FLASHING – The expansion port activity LED should flash at a rate
proportional to the level of SAS port interface activity as determined by
the expansion canister. The port shall also blink when routing updates
or configuration changes are being performed on the port
LED
layout
LED Name Color States
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