客户反映：SUN T5220后面板告警，及前面板FAN指示灯告警。

1/登进串口控制台，默认进入“sc>”用户终端(此终端为admin用户所登陆,之前有人登陆。)

注：登进串口控制台，root用户（初始密码：changeme）,在无admin用户情况下，创建admin用户:

create /SP/users/admin

password:admin

-->set /SP/users/admin role=Administrator

-->set /SP/users/admin cli_mode=alom

创建完后，注销

-->exit

2/既然在“sc>”提示符下，则先“help”

sc> help

Available commands

------------------

Power and Reset control commands:

powercycle [-y] [-f]

poweroff [-y] [-f]

poweron [-c] [FRU]

reset [-y] [-c] [-d] [-f] [-n]

Console commands:

break [-y] [-c]

console [-f]

consolehistory [-b lines|-e lines|-v] [-g lines] [boot|run]

Boot control commands:

bootmode [normal|reset_nvram|bootscript="string"|config="configname"]

setkeyswitch [-y] <normal|stby|diag|locked>

showkeyswitch

Locator LED commands:

setlocator [on|off]

showlocator

Status and Fault commands:

clearasrdb

clearfault <UUID>

disablecomponent [asr-key]

enablecomponent [asr-key]

removefru [-y] <FRU>

setfru -c [data]

showcomponent [asr-key]

showenvironment

showfaults [-v]

showfru [FRU]

showlogs [-b lines|-e lines|-v] [-g lines] [-p logtype[r|p]]

shownetwork [-v]

showplatform [-v]

showpower [-v]

ALOM Configuration commands:

setdate <[mmdd]HHMM | mmddHHMM[cc]yy][.SS]>

setsc [param] [value]

setupsc

showdate

showhost [version]

showsc [-v] [param]

ALOM Administrative commands:

flashupdate <-s IPaddr -f pathname> [-v] [-y] [-c]

help [command]

logout

password

resetsc [-y]

restartssh [-y]

setdefaults [-y]

ssh-keygen [-l|-r] <-t {rsa|dsa}>

showusers [-g lines]

useradd <username>

userclimode <username> <default|alom>

userdel [-y] <username>

userpassword <username>

userperm <username> [c][u][a][r][o][s]

usershow [username]

3/可见showfaults[-v] 是显示当前系统故障。

sc> showfaults

Last POST Run: Fri Jul 20 05:12:03 2012

Post Status: Passed all devices

ID FRU               Fault

1 /SYS/FANBD0/FM1   SP detected fault: TACH at /SYS/FANBD0/FM1/F1 has reached low non-recoverable threshold.

2 /SYS/FANBD0/FM1   SP detected fault: TACH at /SYS/FANBD0/FM1/F0 has reached low non-recoverable threshold.

3 /SYS/FANBD0/FM0   SP detected fault: TACH at /SYS/FANBD0/FM0/F0 has reached low non-recoverable threshold.

4 /SYS/FANBD0/FM0   SP detected fault: TACH at /SYS/FANBD0/FM0/F1 has reached low non-recoverable threshold.

5 /SYS/MB           Host detected fault MSGID: PCIEX-8000-0A  UUID: 31b27bc3-0aff-6aea-c326-d2459bb1ff51

4/定位故障，由上面显示，2块风扇模块FM0、FM1发现故障。其中“/SYS/MB” 为主板（预测性自我修复诊断出主板故障，而实际有故障的组件为FAN）

5/处理故障：

1数据备份，建议客户应用及业务数据备份

2连接控制台，使用串口线连接机器进入串行控制台

3关闭系统电源，在串行控制台执行命令: -> stop /SYS

4佩戴防静电护腕，确认已经佩戴防静电护腕，并且防静电护腕连接到机柜上的未涂漆部分

5断开电源，断开主电源和次电源

6记录线序，记录设备线序，拔掉设备线

7提起闩锁，打开顶盖门。

8拆除有故障的风扇。

9将取下的风扇放置在防静电的材质表面

10从防静电包装中取出新风扇

11其按照正确的方位安装风扇。

12合上顶盖门

13线序按照记录，重新插回。

14加电自检，确认硬件是否就绪。

15启动系统，在控制台执行命令->  start /SYS

6/查看故障，进入root用户，使用“show /SP/faultmgmt”命令查看故障。

-> show /SP/faultmgmt

/SP/faultmgmt

Targets:

shell

0 (/SYS/MB)

Properties:

Commands:

cd

show

7/可见在系统中故障已消失，但是面板上的告警灯未消除，而且在root下查看故障报错为“0 (/SYS/MB)”因上述已说明“(/SYS/MB)”为主板误报错（其真正故障的是FAN），所以此告警并非真正告警，所以消除。

8/消除告警指示灯“set /SYS/MB clear_fault_action=true”

-> set /SYS/MB clear_fault_action=true

Are you sure you want to clear /SYS/MB (y/n)? y

Set 'clear_fault_action' to 'true'

9/再次查看故障“show /SP/faultmgmt ”并未有主板告警，而且面板告警灯也消除。

-> show /SP/faultmgmt

/SP/faultmgmt

Targets:

shell

Properties:

Commands:

cd

show

10/退出，OK！

-> exit