  Machine Check (MACHINECHK) bugcheck errors? 
 The Question is:
 
We have a VAXcluster with 2 MVax 6400 (named
CSIM2 and CSIM3) and 3 VaxStation (named CSIM4,
CSIM5 and CSIM7). Suddenly and 2 or 3 times a
day(!), it happens that one of the node (CSIM3) shutdown and reports this kind
 of error:
 
 ERROR SEQUENCE 3192.                            LOGGED ON:        SID 0A000005
 DATE/TIME 14-JUL-2003 11:26:59.45                            SYS_TYPE 01530201
 SYSTEM UPTIME: 0 DAYS 01:55:07
 SCS NODE: CSIM3                                               VAX/VMS V5.5-2
 
 FATAL BUGCHECK  KA640  CPU FW REV# 6.  CONSOLE FW REV# 5.3
 
 MACHINECHK, Machine check while in kernel mode
 
       PROCESS NAME    NUL
 
       PROCESS ID      00010000
 
       ERROR PC        80A4C5C9
       ERROR PSL       041F0008
                                       N-BIT
                                       INTERRUPT PRIORITY LEVEL = 31.
                                       PREVIOUS MODE = KERNEL
                                       CURRENT MODE = KERNEL
                                       INTERRUPT STACK
                                       FIRST PART DONE CLEAR
 
 STACK POINTERS
 
 KSP 7FFE7800  ESP 7FFE9800  SSP 7FFED800  USP 7FF6C104  ISP 81571114
 
 GENERAL REGISTERS
 
 R0  804C3C68  R1  81570000  R2  0000000A  R3  81397E80  R4  808E2210
 R5  808E20B0  R6  81397EAC  R7  00000000  R8  00000001  R9  00001044
 R10 00004F87  R11 00000630  AP  7FF6C128  FP  7FF6C104  SP  815711AC
 
 SYSTEM REGISTERS
 
       P0BR            8161D400
                                       P0 PTE BASE (VIRT ADDRS)
       P0LR            0000076C
                                       TOTAL P0 PAGES
       P1BR            80E8D200
                                       P1 PTE BASE (VIRT ADDRS)
       P1LR            001FFB4D
                                       TOTAL NON-EXISTENT P1 PAGES
       SBR             032C0A00
                                       SYSTEM PTE BASE (PHYS ADDRS)
       SLR             0004C080
                                       TOTAL PAGES "SYSTEM" VIRT MEM
       PCBB            02A18020
                                       PCB BASE (PHYS ADDRS)
       SCBB            032B8000
                                       SCB BASE (PHYS ADDRS)
       ASTLVL          00000004
                                       NO AST'S PENDING
       SISR            00000000
                                       INTERRUPT REQUEST ACTIVE = 0.
       ICCS            00000040
 
 V A X / V M S        SYSTEM ERROR REPORT         COMPILED 14-JUL-2003 13:31:52
                                                                      PAGE 188.
 
                                       INTERRUPT ENABLE
       TODR            742727FB
       CADR            000000FC
                                       CACHE STATUS:
                                       _D STREAM ENABLED
                                       _I STREAM ENABLED
                                       _SET 1 ENABLED
                                       _SET 2 ENABLED
       MSER            00000080
                                       CACHE MISS
       DSER            00000000
       QBEAR           0000000F
       DEAR            00000000
       IPCR0           00000020
                                       LOCAL MEMORY EXTERNAL ACCESS ENABLED
 
       MEMCSR16        00000044
                                       PHYSICAL PAGE ADDR = 00000(X)
                                       ECC ERROR SYNDROME = 44(X)
       MEMCSR17        0000301F
 
 
 The Answer is :
 
  Machine check errors (MACHINECHK) typically imply hardware failures
  or possibly (but less commonly) low-level software problems -- and
  based on the error log, please contact your local hardware service
  organization for assistance with these MicroVAX 3400 series
  systems, as it would appear that you have one or more hardware
  problems with one of the systems.
 
  If you wish to perform self-maintenance of your hardware, please
  consider the Assisted Services program referenced in the FAQ.
  The Assisted Services program can provide you with diagnostics
  and documentation and spares; with access to the information,
  diagnostics, and supporting materials that can be needed to
  maintain and to repair your own hardware.
 
 Answer written or last revised on  18-JUL-2003 
