在线替换磁盘

1、由于磁盘信息较多，所有可以根据自己的需要来过滤得到自己想要的信息
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aAll| grep -Ei "(Enclosure Device|Slot Number|Raw Size|Firmware state)"  ---粗过滤
grep是过滤的意思
-E参数是使用扩展正则表达式来过滤
-i参数是不区分大小写来过滤

Enclosure Device过滤出raid卡的ID；Slot Number过滤出磁盘的槽号；RawSize过滤出磁盘的大小；Firmware state过滤出磁盘的状态。

 2、创建raid0

/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r0[75:6] WB Direct -a0

使用 /opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r0[252:5] WB Direct -a0 尝试为其组raid0，报以下错误
      The specified physical disk does not have the appropriate attributes to complete the requested command.
      Exit Code: 0x26

a、扫描外来配置的个数：
     # /opt/MegaRAID/MegaCli/MegaCli64 -cfgforeign -scan -a0       
               There are 1 foreign configuration(s) on controller 0.
               Exit Code: 0x00
 b、清除外来配置：
            # /opt/MegaRAID/MegaCli/MegaCli64 -cfgforeign -clear -a0
               Foreign configuration 0 is cleared on controller 0.
               Exit Code: 0x00
 c、再次扫描外来配置的个数，可以发现外来配置已清除，磁盘此时可正常组raid
            # /opt/MegaRAID/MegaCli/MegaCli64 -cfgforeign -scan -a0 
                There is no foreign configuration on controller 0.
                Exit Code: 0x00