背景：某台机器做个几块单盘RAID0，可以理解成单盘单用，因为有RAID卡必须要做RAID才能识别到硬盘，所以单块盘也要做成RAID0。现在有块盘坏了，厂家换了新盘没重做，怎么恢复呢？
1、查看所有磁盘的状态，这没啥好说的
./MegaCli64 -PDList -a0
2、有块盘Firmware state是Unconfigured(bad)，这是今天要拯救的目标
Enclosure Device ID: 0
Slot Number: 3
Device Id: 8
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA
Raw Size: 3.638 TB [0x1d1c0beb0 Sectors]
Non Coerced Size: 3.637 TB [0x1d1b0beb0 Sectors]
Coerced Size: 3.637 TB [0x1d1b00000 Sectors]
Firmware state: Unconfigured(bad)
SAS Address(0): 0x5001c45000785ca3
Connected Port Number: 0(path0)
Inquiry Data: 手动马赛克
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Foreign State: None
Device Speed: Unknown
Link Speed: Unknown
Media Type: Hard Disk Device
3、可选：查看磁盘的缓存策略，每块盘一行，现在的结果应该少一行，因为少块盘
./MegaCli64 -LDGetProp -Cache -Lall -a0
4、先让这块磁盘变成good
./MegaCli64 -PDMakeGood -PhysDrv[0:3] -a0
Adapter: 0: EnclId-0 SlotId-3 state changed to Unconfigured-Good.
Exit Code: 0x00
这里-PhysDrv[0:3]对应上面的Enclosure Device ID和Slot Number，-a肯定是Adapter #0，不太懂为啥盘要有Good/bad之分。再看磁盘的状态
Enclosure Device ID: 0
Slot Number: 3
Device Id: 8
Sequence Number: 3
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA
Raw Size: 3.638 TB [0x1d1c0beb0 Sectors]
Non Coerced Size: 3.637 TB [0x1d1b0beb0 Sectors]
Coerced Size: 3.637 TB [0x1d1b00000 Sectors]
Firmware state: Unconfigured(good), Spun Up
SAS Address(0): 0x5001c45000785ca3
Connected Port Number: 0(path0)
Inquiry Data: 手动马赛克
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Foreign State: Foreign
Foreign Secure: Drive is not secured by a foreign lock key
Device Speed: Unknown
Link Speed: Unknown
Media Type: Hard Disk Device
5、磁盘确实Good了，但是Foreign State变成了Foreign，需要清除Foreign
./MegaCli64 -cfgforeign -clear -a0
Foreign configuration 0 is cleared on controller 0.
Exit Code: 0x00
再看磁盘的状态
Enclosure Device ID: 0
Slot Number: 3
Device Id: 8
Sequence Number: 3
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA
Raw Size: 3.638 TB [0x1d1c0beb0 Sectors]
Non Coerced Size: 3.637 TB [0x1d1b0beb0 Sectors]
Coerced Size: 3.637 TB [0x1d1b00000 Sectors]
Firmware state: Unconfigured(good), Spun Up
SAS Address(0): 0x5001c45000785ca3
Connected Port Number: 0(path0)
Inquiry Data: 手动马赛克
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Foreign State: None
Device Speed: Unknown
Link Speed: Unknown
Media Type: Hard Disk Device
6、现在再做RAID0
./MegaCli64 -cfgldadd -r0 [0:3] WB RA Direct -a0
Adapter 0: Created VD 马赛克
Adapter 0: Configured the Adapter!!
Exit Code: 0x00
这时候再看./MegaCli64 -LDGetProp -Cache -Lall -a0，应该会多一行，对应上面的新VD