1 一台Inspur SA5212H2 300G*2 做得raid1装系统，3T*12 做得raid单盘raid0.业务线需要把3T*12重做一个raid5，且系统保持不变。
2
/opt/MegaRAID/MegaCli/MegaCli64 -cfglddel l1 a0
依次删除raid0信息，l1 l2 ... l12。
3
/opt/MegaRAID/MegaCli/MegaCli64 -CfgAllFreeDrv r5 WB NORA Cached CachedBadBBU -a0
剩下的未配置盘全部加入raid5中。
4
/opt/MegaRAID/MegaCli/MegaCli64 -LDINFO LALL Aall
查看逻辑盘信息
5
Name :
RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3
Size : 27.013 TB
Sector Size : 512
Parity Size : 2.728 TB
State : Optimal
Strip Size : 256 KB
Number Of Drives : 11
Span Depth : 1
Default Cache Policy: WriteBack, ReadAheadNone, Cached, Write Cache OK if Bad BBU
Current Cache Policy: WriteBack, ReadAheadNone, Cached, Write Cache OK if Bad BBU
Default Access Policy: Read/Write
Current Access Policy: Read/Write
Disk Cache Policy : Disk's Default
Encryption Type : None
PI type: No PI
6Number Of Drives : 11 且总容量不对，用
/opt/MegaRAID/MegaCli/MegaCli64 -pdlist a0
发现slot8 是unconfigued bad状态，且有foreing信息，用
/opt/MegaRAID/MegaCli/MegaCli64 -cfgforeign -clear a0
清除硬盘信息，然后用
/opt/MegaRAID/MegaCli/MegaCli64 -PDMAKEGOOD -PHYSDRV[12:1] -FORCE A0
转换硬盘状态即可。
