You can use LEDs and software to identify faulty components, however, it is best to rely on software to determine if a component is faulty.
The fmadm faulty command displays the list of faults detected by PSH. You can run this command from the host or through the Oracle ILOM fault management shell.
This example shows how to check for faults through the Oracle ILOM fault management shell. You can also check for faults by typing show faulty at the Oracle ILOM prompt.
-> start /SP/faultmgmt/shell
Are you sure you want to start /SP/faultmgmt/shell (y/n)? y
faultmgmtsp> fmadm faulty
------------------- ------------------------------------ -------------- -------
Time UUID msgid Severity
------------------- ------------------------------------ -------------- -------
2016-05-02/19:54:29 2782ad0c-91cb-c780-9663-807f0bf806df SPSUN4V-8001-0J MAJOR
Problem Status : open
Diag Engine : fdd 1.0
System
Manufacturer : Oracle Corporation
Name : SPARC S7-2
Part_Number : 9999991201
Serial_Number : 4568BDC0DF
----------------------------------------
Suspect 1 of 1
Fault class : fault.io.pciex.bus-linkerr-deg
Certainty : 100%
Affects : /SYS/MB/PCIE_SWITCH1/PCIE_LINK14
Status : faulted
FRU
Status : faulty
Location : /SYS/MB
Manufacturer : Oracle Corporation
Name : TLA,MB,TRAY,S7-2
Part_Number : 7329819
Revision : 01
Serial_Number : 465769T+02xxx03N
Chassis
Manufacturer : Oracle Corporation
Name : SPARC S7-2
Part_Number : 9999991201
Serial_Number : 4568BDC0DF
Resource Location : /SYS/MB/PCIE_SWITCH1/PCIE_LINK14
Description : An IO interconnect has trained at a slower speed than
intended.
Response : No automated response.
Impact : System performance may be affected.
Action : Use 'fmadm faulty' to provide a more detailed view of this
event. Please refer to the associated reference document at
http://support.oracle.com/msg/SPSUN4V-8001-0J for the latest
service procedures and policies regarding this diagnosis.
faultmgmtsp>
In this example, a fault is displayed that includes these details:
Date and time of the fault (2016-05-03/16:01:02).
UUID (2782ad0c-91cb-c780-9663-807f0bf806df), which is unique to each fault.
Message ID (SPSUN4V-8001-0J), which can be used to obtain additional fault information from Knowledge Base articles.