Chapter 4 Managing RAS Features and System Firmware 37
■ Memory failure. Given a failed DIMM, the firmware will unconfigure the entire
logical bank associated with the failed module. Another nonfailing logical bank
must be present in the system for the system to attempt a degraded boot.
Note – If POST or OpenBoot firmware detects a nonfatal error associated with the
normal boot device, the OpenBoot firmware automatically unconfigures the failed
device and tries the next-in-line boot device, as specified by the boot-device
configuration variable.
■ If a fatal error is detected by POST or OpenBoot firmware, the system does not
boot regardless of the settings of auto-boot? or auto-boot-on-error?. Fatal
nonrecoverable errors include the following:
■ Any CPU failed
■ All logical memory banks failed
■ Flash RAM cyclical redundancy check (CRC) failure
■ Critical field-replaceable unit (FRU) PROM configuration data failure
■ Critical system processor read failure
■ Critical application-specific integrated circuit (ASIC) failure
Displaying System Fault Information
ALOM software lets you display current valid system faults. The showfaults
command displays the fault ID, the faulted FRU device, and the fault message to
standard output. The showfaults command also displays POST results. For
example:
Adding the –v option displays the time:
sc> showfaults
ID FRU Fault
0 FT0.FM2 SYS_FAN at FT0.FM2 has FAILED.
sc> showfaults -v
ID Time FRU Fault
0 MAY 20 10:47:32 FT0.FM2 SYS_FAN at FT0.FM2 has FAILED.
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