一次RP8420宕机事件

离CELL板更换完已经有些日子了，当然还没出一个月。
某天，客户突然打来电话说机器宕机了，事情真有点无休止的感觉。
到了现场后机器已经起来了，随即询问宕机过程，收集各种LOG，以及ts99等。
现象是这样的，CELL板自动power off，只能再加电才能启动。
通过查看LOG,分析ts99，以及公司同事的帮助最后确定可能为以下几个模块的问题：
1.CELL 板 2.CPU 3.CPU 风扇 4.VRM卡
先换的CPU风扇，结果还是宕机，后来根据MP LOG，更换了VRM卡，问题解决。

其实看MP LOG，还是很准确的，从一开始就觉得应该是VRM的问题，只是一直没有确定，
看来还是应该先更换最明显的部件。附上有关log，大家可以看下
rp8420.rar (27.44 KB)

[uninitialized] MP:VWR (,,+,-,?,F,L,J,D,K,R,T,A,C,U,^B) > [uninitialized]  
Log Entry 14598:    06/04/2050 00:18:00
Alert level 2:  Informational
Keyword:  ERR_CPU_CHECK_SUMMARY
CPU API CpuProcessMachineCheck return value report
Reporting Entity:  System Firmware located in cabinet 0, slot 2, cpu 0
System Firmware Return Code:  0x8060400000000000
0x57800f7320e00763 0x8060400000000000
0x4b000f7320e00764 0x0100000097458138

Log Entry 14597:    06/04/2050 00:18:00
Alert level 2:  Informational
Keyword:  CELL_POWER_OFF
The Cell power has transitioned from an on to an off state.
Reporting Entity:  Processor Dependent Hardware Controller located in cabinet 0, slot 0
0x4b000c3900e00762 0x0100000097458138

[uninitialized] MP:VWR (,,+,-,?,F,L,J,D,K,R,T,A,C,U,^B) > [uninitialized]  
Log Entry 14596:    06/04/2050 00:18:00
Alert level 3:  Warning
Keyword:  CELL_VRM_VOLT_FLT
The vrm on the specified cell is reporting a voltage fault.
Reporting Entity:  Processor Dependent Hardware Controller located in cabinet 0, slot 0
Physical Location:  Low voltage power supply cabinet 0 slot 14
0x648013c700e00760 0x00ffff00ff0eff43
0x6b0013c700e00761 0x0100000097458138

Log Entry 14595:    06/04/2050 00:18:00
Alert level 2:  Informational
Keyword:  CELL_OFF
The specified cell has been powered off.
Reporting Entity:  Management Processor located in cabinet 0
Physical Location:  Cell board cabinet 0 slot 0
0x44800ee800e0075e 0x00ffffffff00ff68
0x4b000ee800e0075f 0x0100000097458138

[uninitialized] MP:VWR (,,+,-,?,F,L,J,D,K,R,T,A,C,U,^B) > [uninitialized]  
Log Entry 14594:    06/04/2050 00:15:36
Alert level 3:  Warning
Keyword:  CELL_VRM_VOLT_FLT
The vrm on the specified cell is reporting a voltage fault.
Reporting Entity:  Processor Dependent Hardware Controller located in cabinet 0, slot 0
Physical Location:  Low voltage power supply cabinet 0 slot 8
0x648013c700e0075c 0x00ffff00ff08ff43
0x6b0013c700e0075d 0x01000000974580a8

Log Entry 14593:    06/04/2050 00:00:11
Alert level 2:  Informational
Keyword:  MP_TIMESTAMP
MP timestamp event.
Reporting Entity:  Management Processor located in cabinet 0
0x4b001a6600e0075b 0x0100000097457d0b