Sun Fire[TM] 3800-6800: Troubleshooting NCPQ_TO errors
Last updated on FEBRUARY 02, 2017
Applies to:Sun Fire 3800 Server - Version Not Applicable and later
Sun Fire 4800 Server - Version Not Applicable and later
Sun Fire 6800 Server - Version Not Applicable and later
This document aids in troubleshooting Non-Cacheable Pending Queue Time Outs (NCPQ_TO) on Sun Fire 3800/4800/4810/6800 systems. NCPQ_TOs occur when data requests in Non-Cacheable address space do not complete a transaction. Non-Cacheable addresses space is Safari Device config and I/O address space.
In most situations this is a type of error that requires Support Services to be engaged in order to be resolved. Please review the document to see if the resolution to this issue is available within, but if not, you will likely be required to log a Service Request with Support Services to get resolution. Please mention this article when logging the Service Request.
Error messages indicating a NCPQ_TO occurred are seen on the Domain Console. The error messages are also stored in the Domain Console Buffer and can be retrieved by the Sun Fire System Controller (SC) command showlogs. If a loghost is configured, the error messages are stored on the loghost. NCPQ_TOs can occur during normal operation of the Domain or during POST.
Here is an example log of a NCPQ_TO error:
Feb 26 10:46:02 systemx DomC.SC: ErrorMonitor:Domain C has a SYSTEM ERROR Feb 26 10:46:02 systemx DomC.SC: /N0/SB1 encountered the first error Feb 26 10:46:02 systemx DomC.SC: RepeaterSbbcAsic reported first error on /N0/SB1 Feb 26 10:46:02 systemx DomC.SC: /partition1/domain0/SB1/bbcGroup0/sbbc0: FE [15:15] : 0x1 ErrSum [31:31] : 0x1 SafErr [09:08] : 0x1 Fireplane device asserted an error Feb 26 12:20:47 systemx DomC.SC: /partition1/domain0/SB1/bbcGroup0/cpuAB/cpusafariagent0: AFAR (high)[0x531] : 0x0000063c AFAR [42:32] [10:00] : 0x63c AFAR (low)[0x541] : 0xff800000 AFAR_2 (high)[0x571] : 0x0000063c < AFAR_2 [42:32] [10:00] : 0x63c AFAR_2 (low)[0x581] : 0xff800000 < AFSR (high)[0x551] : 0x00080000 PERR [19:19] : 0x1 AFSR_2 (high)[0x591] : 0x00080000 PERR [19:19] : 0x1 EMU B[0x511] : 0x03000000 AID_LK [24:24] : 0x1 NCPQ_TO [25:25] : 0x1
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