http://blog.sina.com.cn/s/blog_57c70e190101ebl9.html
今天给服务器DELL R710加硬盘，准备在线做raid，以前不太注意这些事，搞起来花了一些时间，不过还好是搞定了，赶紧记录下来，免的日后忘记了。 
用MegaCli做阵列，最重要是就是这三个系数：
Adapter #0
Enclosure Device ID: 32
Slot Number: 0
分别代表了 -PhysDrv[E0:S0,E1:S1,...] -aN #物理磁盘的 enclosure号:slot号 -a是阵列卡号
这些参数可以通过下面的命令得到。
查看阵列卡信息
lspci -v
/opt/MegaRAID/MegaCli/MegaCli64 -AdpAllInfo -aALL
查看所有物理硬盘状态
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -a0
# /opt/MegaRAID/MegaCli/MegaCli64 help |grep -i pdinfo
MegaCli -pdInfo -PhysDrv[E0:S0,E1:S1,...] -aN|-a0,1,2|-aALL
MegaCli -LdPdInfo -aN|-a0,1,2|-aALL
查看逻辑盘详细信息
# /opt/MegaRAID/MegaCli/MegaCli64 -LdPdInfo -aALL
查看单个盘的详细信息
# /opt/MegaRAID/MegaCli/MegaCli64 -pdInfo -PhysDrv[32:3] -aALL
Adapter 0: Device at Enclosure - 32, Slot - 3 is not found.
像我新增加的硬盘就是 [32:2]
这里我的硬盘被标记为“Foreign”外来配置，要清除一下，不然会报下面这个错误：
The specified physical disk does not have the appropriate attributes to complete
the requested command.
Exit Code: 0x26
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
清除外来配置：
# /opt/MegaRAID/MegaCli/MegaCli64 -cfgforeign -clear -a0
Foreign configuration 0 is cleared on controller 0.
Exit Code: 0x00
再次扫描外来配置的个数：
# /opt/MegaRAID/MegaCli/MegaCli64 -cfgforeign -scan -a0
There is no foreign configuration on controller 0.
Exit Code: 0x00
创建Raid0
# /opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r0[32:2] WB Direct -a0
Adapter 0: Created VD 2
Adapter 0: Configured the Adapter!!
Exit Code: 0x00
删除阵列：
# /opt/MegaRAID/MegaCli/MegaCli6 -cfgclr -a0 清除所有的raid组的配置
# /opt/MegaRAID/MegaCli/MegaCli6 -cfglddel -L0 -a0 删除指定的raid组(Target Id: 0)的raid组，可以通过上面的“查看逻辑盘详细信息”得到。
查看硬盘的重建情况：
# /opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ProgDsply -PhysDrv [12:7] -aALL
Device(Encl-12 Slot-7) is not in rebuild process
# /opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ProgDsply -PhysDrv [12:7] -aALL
Device(Encl-12 Slot-7) is not in rebuild process
参考资料：
http://blog.csdn.net/heart_2011/article/details/7254404
http://zh.community.dell.com/techcenter/b/weblog/archive/2013/03/07/megacli-command-share.aspx