T4-4 fails to boot due to Unexpected Traps

Asset ID:	1-72-1928708.1
Update Date:	2018-01-16
Keywords:

Solution Type Problem Resolution Sure

Solution 1928708.1 : T4-4 fails to boot due to Unexpected Traps

Applies to:

SPARC T4-4 - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

System hangs on booting.
No error at ILOM.
POST passed all devices without disabling any component.
NO error at FMA, vbsc, any disable component
Same behavior after removing power cords

Everytime the system enables L3 Banks it shows the Unexpected trap error

[CPU 3:0:0] NOTICE: L3 Banks Enabled: ff
[CPU 0:0:0] NOTICE: L3 Banks Enabled: ff
[CPU 1:0:0] NOTICE: L3 Banks Enabled: ff
[CPU 2:0:0] NOTICE: L3 Banks Enabled: ff
Unexpected Trap: node:00000001 cpu:00000000 tt:00000014 tpc:000000000004c76c
[CPU 0:0:0] NOTICE: Checking Flash File System
[CPU 0:0:0] NOTICE: Initializing TOD: 2014/09/08 18:09:00
[CPU 0:0:0] NOTICE: Loaded ASR status DB data. Ve

Changes

System went down unexpectedly.

Cause

The traps came from CPU0

Unexpected Trap: node:00000001 cpu:00000000 tt:00000014 tpc:000000000004c76c

Some of the "Unexpected Trap" errors were mixed with garbage characters

Unexpected Trap20:1 4 -0n9o-d0e9: 1090:00060:02041   c3p:u0::00>0 0N0O0T0I0C0E :t t :I0n0i0t0i0a0l3i4z itnpgc :C0O0U0 0R0e0g0s0
Unexpected Trap20:1 4 -0n9o-d0e9: 1090:01000:04001   c3p:u0::000>0 0N0O0T0I0C Et:t : 0In0i0t0i0a0l3i4z itnpgc :C0OU0 0R0e0g0s0
Unexpected Trap20:1 4- 0n9o-d0e9: 1090:04080:04031   c3p:u0::00>0 0N0O0T0I0C0E :t t :I0ni0t0i0a0l0i3z4i ntgp cC:O0U 0R0e0g0s0

Solution

The replacement of CPU0 solved the issue and the system booted.

Suggested Action for System Administrator

In any case an SR should be opened with Oracle support to review a recent snapshot of the ILOM. To get the snapshot you can look at Collecting snapshot on ILOM 3.x and later platforms (Doc ID 1020204.1) and/or Collecting snapshot via the GUI on ILOM 3.x and later platforms (Doc ID 1553399.1).

References

<NOTE:1908060.1> - T4-4 fails to start with ERROR: Powering down due to Fatal Error

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