MegaCli是一款管理维护硬件RAID软件，可以通过它来了解当前raid卡的所有信息，包括 raid卡的型号，raid的阵列类型，raid 上各磁盘状态
[root@localhost ~]# wget http://ftp.cs.stanford.edu/pub/rpms/centos/5/x86_64/Lib_Utils-1.00-08.noarch.rpm
[root@localhost ~]# rpm -ivh Lib_Utils-1.00-08.noarch.rpm
[root@localhost ~]# wget http://ftp.cs.stanford.edu/pub/rpms/centos/5/x86_64/MegaCli-8.00.46-1.i386.rpm
[root@localhost ~]# rpm -ivh MegaCli-8.00.46-1.i386.rpm
工具自动保存在/opt/下面
查看RAID级别：
[root@localhost ~]# /opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -aALL
MegaCli64-raid对应关系
RAID Level : Primary-1, Secondary-0, RAID Level Qualifier-0 RAID 1
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0 RAID 0
RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3 RAID 5
RAID Level : Primary-1, Secondary-3, RAID Level Qualifier-0 RAID 10
可以使用ln -s /opt/MegaRAID/MegaCli/MegaCli64 /usr/bin/MegaCli64
直接使用MegaCli64 -LDInfo -Lall -aALL