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Sun Fire[TM] 3800, 4800, 4810, 6800, E4900, E6900, V1280, E2900, Netra 1280, or 1290 server: NCPQ_TO workarounds (Doc ID 1009008.1)

Last updated on APRIL 20, 2021

Applies to:

Sun Netra 1280 Server - Version Not Applicable and later
Sun Fire V1280 Server - Version Not Applicable and later
Sun Fire 3800 Server - Version Not Applicable and later
Sun Fire 4800 Server - Version Not Applicable and later
Sun Fire 4810 Server - Version Not Applicable and later
All Platforms

Symptoms

An NCPQ_TO (Non-Coherent Pending Queue Time-Out) will cause a domain to error pause.  This means the domain in question will be reset in order to be recovered (it will shut down and restart - reboot).

This error pause will appear on the SC platform shell (console messaging) or in the showlogs file as:

ErrorMonitor: Domain A has a SYSTEM ERROR

Note:  The domain in question will change depending on which domain actually encounters the error.

An NCPQ_TO will also appear on the SC domain shell and in showlogs as:

/partition0/domain0/SB0/bbcGroup1/sbbc1:
>>> ErrorStatus[0x80] : 0x80008200
FE [15:15] : 0x1
ErrSum [31:31] : 0x1
SafErr [09:08] : 0x2 Fireplane device asserted an error
/partition0/domain0/SB0/bbcGroup1/cpuCD/cpusafariagent1:
AFSR (high)[0x551] : 0x00080000
PERR [19:19] : 0x1
EMU B[0x511] : 0x00c00000
AID_LK [22:22] : 0x1 ATransID leakage error
NCPQ_TO [23:23] : 0x1 NCPQ system bus time-out>>

On an UltraSPARC[R] III machine, the bit signalling NCPQ_TO changes slightly:

/partition0/domain0/SB0/bbcGroup1/cpuCD/cpusafariagent0:
AFAR (high)[0x531] : 0x0000041c
AFAR [42:32] [10:00] : 0x41c
AFAR (low)[0x541] : 0x009115e0
AFAR_2 (high)[0x571] : 0x0000041c
AFAR_2 [42:32] [10:00] : 0x41c
AFAR_2 (low)[0x581] : 0x009115e0
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 ATransID leakage error
NCPQ_TO [25:25] : 0x1 NCPQ system bus time-out 
 

Cause

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