MegaCli修复单盘RAID0

背景：某台机器作个几块单盘RAID0，能够理解成单盘单用，由于有RAID卡必需要作RAID才能识别到硬盘，因此单块盘也要作成RAID0。如今有块盘坏了，厂家换了新盘没重作，怎么恢复呢？

一、查看全部磁盘的状态，这没啥好说的

./MegaCli64 -PDList -a0

二、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

三、可选：查看磁盘的缓存策略，每块盘一行，如今的结果应该少一行，由于少块盘

./MegaCli64 -LDGetProp -Cache -Lall -a0

四、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确定是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

五、磁盘确实Good了，可是Foreign State变成了Foreign，须要清除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

六、如今再作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