https://www.cnblogs.com/xth0331/p/9655593.html
JBOD
一天小明做了个系统，要装ceph，也许是Raid卡不支持JBOD,就只能做Raid0咯，表面看着好像没区别，大佬还会跟你讲做Raid0有毛线用，我在想也许他还不知道Ceph是替代什么的吧,像我这种小白，连JBOD是什么都不知道，（之前Cisco UCS 做Raid的时候看到过这个选项）。
JBOD是存储领域中一类重要的存储设备，Low点的说法叫Raid卡直通，Just a Bunch Of Disks是JBOD的全名，奥，JBOD真的是只是一堆盘的缩写，23333。
如果已经安装完系统，并且没有配置JBOD 而是做了RAID 插入新磁盘， 系统是看不到的，但是有些业务是不能重启的 ，但是你还想加盘，这就需要Megacli来搞事情了。
安装MegaCli
下载并安装
wegt https://docs.broadcom.com/docs-and-downloads/raid-controllers/raid-controllers-common-files/8-07-10_MegaCLI_Linux.zip
unzip 8-07-10_MegaCLI_Linux.zip
yum localinstall 8.07.10_MegaCLI_Linux/Linux\ MegaCLI\ 8.07.10/MegaCli-8.07.10-1.noarch.rpm目录根据情况修改
我们看下都生成了什么！！
rpm -ql rpm -ql MegaCli
/opt/MegaRAID/MegaCli/MegaCli
/opt/MegaRAID/MegaCli/MegaCli64
/opt/MegaRAID/MegaCli/libstorelibir-2.so.14.07-0/opt/MegaRAID/MegaCli/MegaCli64这个文件就是我们要用到的，
Megacli概念
适配器，物理驱动器和虚拟驱动器
在我们通过megacli命令之前，我们需要遵循megacli概念。
适配器 - 我们要使用的物理控制器，由id（通常为0）表示。
机柜 - 物理机箱所附的物理驱动器，以id为代表，例如254,252等。
物理驱动器 - 附加到控制器的物理硬盘，由id，0,1,2,3等代表
虚拟驱动器 - 这些驱动器包含物理驱动器，并等同于由id，0,1,2,3等代表的RAID设备。
例如，如果我们的RAID 0超过3个物理驱动器，我们得到：
物理驱动器ID：0,1,2
虚拟驱动器ID：0
虚拟驱动器包含物理驱动器0,1和2，并包括突袭设备的设置，如RAID级别，条带大小等。
我们可以通过一个物理驱动器看到具有RAID 0的虚拟驱动器中的配置，我们有这种设置，因为物理驱动器连接到RAID控制器，并且为了将设备表示给系统，我们必须将其设置为兆位。
默认情况下，我们将在RAID 0中看到虚拟驱动器的所有物理设备。
获取RAID控制器信息
使用lspci确保您的服务器已连接到RAID控制器。
lspci | grep -i raid我的输出
03:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2208 [Thunderbolt] (rev 05)这表明我这存在MegaRaid controller ；我可以愉快的使用MegaCli搞事！
获取RAID适配器的信息
/opt/MegaRAID/MegaCli/MegaCli64 -AdpGetPciInfo -aAll带上路径执行
我的输出
PCI information for Controller 0
--------------------------------
Bus Number : 23c0
Device Number : 0
Function Number : a0
Exit Code: 0x00这里看到适配器信息，适配器id为0。
获取硬盘背板信息
/opt/MegaRAID/MegaCli/MegaCli64 -EncInfo -a0我的输出
Number of enclosures on adapter 0 -- 1
Enclosure 0:
Device ID : 252
Number of Slots : 8
Number of Power Supplies : 0
Number of Fans : 0
Number of Temperature Sensors : 0
Number of Alarms : 0
Number of SIM Modules : 1
Number of Physical Drives : 8
Status : Normal
Position : 1
Connector Name : Unavailable
Enclosure type : SGPIO
FRU Part Number : N/A
Enclosure Serial Number : N/A
ESM Serial Number : N/A
Enclosure Zoning Mode : N/A
Partner Device Id : Unavailable
Inquiry data :
Vendor Identification : LSI
Product Identification : SGPIO
Product Revision Level : N/A
Vendor Specific :
Exit Code: 0x00记录下
| Number of Slots( 可以连接到这个背板的最大物理驱动器 | 8 |
获取物理驱动器的信息
/opt/MegaRAID/MegaCli/MegaCli64 -LdPdInfo -a0因为我的盘比较多。这里输出就列出一个
PD: 0 Information
Enclosure Device ID: 252
Slot Number: 1
Drive's position: DiskGroup: 1, Span: 0, Arm: 0
Enclosure position: N/A
Device Id: 3
WWN: 500003963820BFE1
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 279.396 GB [0x22ecb25c Sectors]
Non Coerced Size: 278.896 GB [0x22dcb25c Sectors]
Coerced Size: 278.875 GB [0x22dc0000 Sectors]
Sector Size: 512
Logical Sector Size: 512
Physical Sector Size: 512
Firmware state: Online, Spun Up
Commissioned Spare : No
Emergency Spare : No
Device Firmware Level: 1004
Shield Counter: 0
Successful diagnostics completion on : N/A
SAS Address(0): 0x500003963820bfe2
SAS Address(1): 0x0
Connected Port Number: 1(path0)
Inquiry Data: TOSHIBA AL13SEB300 100445O0A05KFWC9
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive: Not Certified
Drive Temperature :24C (75.20 F)
PI Eligibility: No
Drive is formatted for PI information: No
PI: No PI
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Port-1 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No
Virtual Drive: 2 (Target Id: 2)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache 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
Is VD Cached: No
Number of Spans: 1
Span: 0 - Number of PDs: 1
PD: 0 Information
Enclosure Device ID: 252
Slot Number: 3
Drive's position: DiskGroup: 2, Span: 0, Arm: 0
Enclosure position: N/A
Device Id: 14
WWN: 500003963820C81D
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 279.396 GB [0x22ecb25c Sectors]
Non Coerced Size: 278.896 GB [0x22dcb25c Sectors]
Coerced Size: 278.875 GB [0x22dc0000 Sectors]
Sector Size: 512
Logical Sector Size: 512
Physical Sector Size: 512
Firmware state: Online, Spun Up
Commissioned Spare : No
Emergency Spare : No
Device Firmware Level: 1004
Shield Counter: 0
Successful diagnostics completion on : N/A
SAS Address(0): 0x500003963820c81e
SAS Address(1): 0x0
Connected Port Number: 3(path0)
Inquiry Data: TOSHIBA AL13SEB300 100445O0A08RFWC9
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive: Not Certified
Drive Temperature :26C (78.80 F)
PI Eligibility: No
Drive is formatted for PI information: No
PI: No PI
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Port-1 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No
Virtual Drive: 3 (Target Id: 3)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache 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
Is VD Cached: No
Number of Spans: 1
Span: 0 - Number of PDs: 1
PD: 0 Information
Enclosure Device ID: 252
Slot Number: 2
Drive's position: DiskGroup: 3, Span: 0, Arm: 0
Enclosure position: N/A
Device Id: 16
WWN: 500003963820C225
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 279.396 GB [0x22ecb25c Sectors]
Non Coerced Size: 278.896 GB [0x22dcb25c Sectors]
Coerced Size: 278.875 GB [0x22dc0000 Sectors]
Sector Size: 512
Logical Sector Size: 512
Physical Sector Size: 512
Firmware state: Online, Spun Up
Commissioned Spare : No
Emergency Spare : No
Device Firmware Level: 1004
Shield Counter: 0
Successful diagnostics completion on : N/A
SAS Address(0): 0x500003963820c226
SAS Address(1): 0x0
Connected Port Number: 2(path0)
Inquiry Data: TOSHIBA AL13SEB300 100445O0A06AFWC9
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive: Not Certified
Drive Temperature :26C (78.80 F)
PI Eligibility: No
Drive is formatted for PI information: No
PI: No PI
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Port-1 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No
Virtual Drive: 4 (Target Id: 4)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 837.843 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache 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
Is VD Cached: No
Number of Spans: 1
Span: 0 - Number of PDs: 1
PD: 0 Information
Enclosure Device ID: 252
Slot Number: 4
Drive's position: DiskGroup: 4, Span: 0, Arm: 0
Enclosure position: N/A
Device Id: 15
WWN: 5000C500958D1EB8
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 838.362 GB [0x68cb9e30 Sectors]
Non Coerced Size: 837.862 GB [0x68bb9e30 Sectors]
Coerced Size: 837.843 GB [0x68bb0000 Sectors]
Sector Size: 512
Logical Sector Size: 512
Physical Sector Size: 512
Firmware state: Online, Spun Up
Commissioned Spare : No
Emergency Spare : No
Device Firmware Level: L56Q
Shield Counter: 0
Successful diagnostics completion on : N/A
SAS Address(0): 0x5000c500958d1eb9
SAS Address(1): 0x0
Connected Port Number: 4(path0)
Inquiry Data: LENOVO-XST900MM0006 L56QS0N5129S0521B5C9
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive: Not Certified
Drive Temperature :28C (82.40 F)
PI Eligibility: Yes
Number of bytes of user data in LBA: 512
Drive is formatted for PI information: Yes
PI: PI with type 2
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Port-1 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No
Virtual Drive: 5 (Target Id: 5)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAdaptive, Direct, No Write Cache 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
Is VD Cached: No
Number of Spans: 1
Span: 0 - Number of PDs: 1
PD: 0 Information
Enclosure Device ID: 252
Slot Number: 5
Drive's position: DiskGroup: 5, Span: 0, Arm: 0
Enclosure position: N/A
Device Id: 18
WWN: 500003963820C429
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 279.396 GB [0x22ecb25c Sectors]
Non Coerced Size: 278.896 GB [0x22dcb25c Sectors]
Coerced Size: 278.875 GB [0x22dc0000 Sectors]
Sector Size: 512
Logical Sector Size: 512
Physical Sector Size: 512
Firmware state: Online, Spun Up
Commissioned Spare : No
Emergency Spare : No
Device Firmware Level: 1004
Shield Counter: 0
Successful diagnostics completion on : N/A
SAS Address(0): 0x500003963820c42a
SAS Address(1): 0x0
Connected Port Number: 5(path0)
Inquiry Data: TOSHIBA AL13SEB300 100445O0A06TFWC9
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive: Not Certified
Drive Temperature :24C (75.20 F)
PI Eligibility: No
Drive is formatted for PI information: No
PI: No PI
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Port-1 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No
Virtual Drive: 6 (Target Id: 6)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAdaptive, Direct, No Write Cache 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
Is VD Cached: No
Number of Spans: 1
Span: 0 - Number of PDs: 1
PD: 0 Information
Enclosure Device ID: 252
Slot Number: 6
Drive's position: DiskGroup: 6, Span: 0, Arm: 0
Enclosure position: N/A
Device Id: 19
WWN: 500003963820BFF1
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 279.396 GB [0x22ecb25c Sectors]
Non Coerced Size: 278.896 GB [0x22dcb25c Sectors]
Coerced Size: 278.875 GB [0x22dc0000 Sectors]
Sector Size: 512
Logical Sector Size: 512
Physical Sector Size: 512
Firmware state: Online, Spun Up
Commissioned Spare : No
Emergency Spare : No
Device Firmware Level: 1004
Shield Counter: 0
Successful diagnostics completion on : N/A
SAS Address(0): 0x500003963820bff2
SAS Address(1): 0x0
Connected Port Number: 6(path0)
Inquiry Data: TOSHIBA AL13SEB300 100445O0A05MFWC9
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive: Not Certified
Drive Temperature :24C (75.20 F)
PI Eligibility: No
Drive is formatted for PI information: No
PI: No PI
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Port-1 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No
Virtual Drive: 7 (Target Id: 7)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAdaptive, Direct, No Write Cache 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
Is VD Cached: No
Number of Spans: 1
Span: 0 - Number of PDs: 1
PD: 0 Information
Enclosure Device ID: 252
Slot Number: 7
Drive's position: DiskGroup: 7, Span: 0, Arm: 0
Enclosure position: N/A
Device Id: 20
WWN: 500003963820C2D1
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 279.396 GB [0x22ecb25c Sectors]
Non Coerced Size: 278.896 GB [0x22dcb25c Sectors]
Coerced Size: 278.875 GB [0x22dc0000 Sectors]
Sector Size: 512
Logical Sector Size: 512
Physical Sector Size: 512
Firmware state: Online, Spun Up
Commissioned Spare : No
Emergency Spare : No
Device Firmware Level: 1004
Shield Counter: 0
Successful diagnostics completion on : N/A
SAS Address(0): 0x500003963820c2d2
SAS Address(1): 0x0
Connected Port Number: 7(path0)
Inquiry Data: TOSHIBA AL13SEB300 100445O0A06HFWC9
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive: Not Certified
Drive Temperature :24C (75.20 F)
PI Eligibility: No
Drive is formatted for PI information: No
PI: No PI
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Port-1 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No
Exit Code: 0x00Slot Number是物理驱动器连接的插槽号，也就是对应物理驱动器id
获取Virtual drives信息
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -a0我的输出
Adapter 0 -- Virtual Drive Information:
Virtual Drive: 0 (Target Id: 0)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 185.781 GB
Sector Size : 512
Is VD emulated : Yes
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU
Default Access Policy: Read/Write
Current Access Policy: Read/Write
Disk Cache Policy : Enabled
Encryption Type : None
PI type: No PI
Is VD Cached: No
Virtual Drive: 1 (Target Id: 1)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache 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
Is VD Cached: No
Virtual Drive: 2 (Target Id: 2)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache 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
Is VD Cached: No
Virtual Drive: 3 (Target Id: 3)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache 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
Is VD Cached: No
Virtual Drive: 4 (Target Id: 4)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 837.843 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAhead, Direct, No Write Cache 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
Is VD Cached: No
Virtual Drive: 5 (Target Id: 5)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAdaptive, Direct, No Write Cache 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
Is VD Cached: No
Virtual Drive: 6 (Target Id: 6)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAdaptive, Direct, No Write Cache 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
Is VD Cached: No
Virtual Drive: 7 (Target Id: 7)
Name :
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0
Size : 278.875 GB
Sector Size : 512
Is VD emulated : No
Parity Size : 0
State : Optimal
Strip Size : 256 KB
Number Of Drives : 1
Span Depth : 1
Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAdaptive, Direct, No Write Cache 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
Is VD Cached: No
Exit Code: 0x00| Size | RAID设备的大小，这个大小是实际可分配的大小 |
获取Virtual drives内的物理驱动器信息
这就有点难了， 其实没什么卵用,记下来留着以后copy
/opt/MegaRAID/MegaCli/MegaCli64 -LdPdInfo -a0 | grep -E "Virtual Drive:|Slot Number:" | xargs | sed -r 's/(Slot Number:)(\s[0-9]+)/\2,/g' | sed 's/(Target Id: .)/Physical Drives ids:/g' | sed 's/Virtual Drive:/\nVirtual Drive:/g'我的输出
Virtual Drive: 0 Physical Drives ids: 0,
Virtual Drive: 1 Physical Drives ids: 1,
Virtual Drive: 2 Physical Drives ids: 3,
Virtual Drive: 3 Physical Drives ids: 2,
Virtual Drive: 4 Physical Drives ids: 4,
Virtual Drive: 5 Physical Drives ids: 5,
Virtual Drive: 6 Physical Drives ids: 6,
Virtual Drive: 7 Physical Drives ids: 7,或者使用这个工具 "megasasctl"
创建RAID设备（Virtual drives）
前面主要是收集信息，有信息，才可以准确的创建
比如我们来一个
Adpater id: 0
Enclosure id: 252
Physical Drive ids: 3
Raid Level: 0命令参数
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -rX[enclosure_id:physical_id,enclosure_id:physical_id] -aNX 是 RAID级别
N 是 adapter ID
举个栗子
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r0[252:3,252:4] -a0设备编号为3和4的磁盘，创建RAID0
来个RAID10
/opt/MegaRAID/MegaCli/MegaCli64 -CfgSpanAdd -r10 -Array0 [252:2,252:3] -Array1 [252:4,252:5] -a0删除RAID设备
删Virtual drives2
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdDel -L2 -a0常用选项
相关命令及其解析：
查看机器型号 # dmidecode | grep "Product"
查看厂商 # dmidecode| grep "Manufacturer"
查看序列号 # dmidecode | grep "Serial Number"
查看CPU信息 # dmidecode | grep "CPU"
查看CPU个数 # dmidecode | grep "Socket Designation: CPU" |wc –l
查看出厂日期 # dmidecode | grep "Date"
查看充电状态 # MegaCli -AdpBbuCmd -GetBbuStatus -aALL |grep "Charger Status"
显示BBU状态信息 # MegaCli -AdpBbuCmd -GetBbuStatus –aALL
显示BBU容量信息 # MegaCli -AdpBbuCmd -GetBbuCapacityInfo –aALL
显示BBU设计参数 # MegaCli -AdpBbuCmd -GetBbuDesignInfo –aALL
显示当前BBU属性 # MegaCli -AdpBbuCmd -GetBbuProperties –aALL
查看充电进度百分比 # MegaCli -AdpBbuCmd -GetBbuStatus -aALL |grep "Relative State of Charge"
查询Raid阵列数 # MegaCli -cfgdsply -aALL |grep "Number of DISK GROUPS:"
显示Raid卡型号，Raid设置，Disk相关信息 # MegaCli -cfgdsply –aALL
显示所有物理信息 # MegaCli -PDList -aALL
显示所有逻辑磁盘组信息 # MegaCli -LDInfo -LALL –aAll
查看物理磁盘重建进度(重要) # MegaCli -PDRbld -ShowProg -PhysDrv [1:5] -a0
查看适配器个数 #MegaCli –adpCount
查看适配器时间 #MegaCli -AdpGetTime –aALL
显示所有适配器信息 #MegaCli -AdpAllInfo –aAll
查看Cache 策略设置 # MegaCli -cfgdsply -aALL |grep Polic
硬盘方面：
1、查看所有物理磁盘信息
MegaCli -PDList -aALL
2、查看磁盘缓存策略
MegaCli -LDGetProp -Cache -L0 -a0
or
MegaCli -LDGetProp -Cache -L1 -a0
or
MegaCli -LDGetProp -Cache -LALL -a0
or
MegaCli -LDGetProp -Cache -LALL -aALL
or
MegaCli -LDGetProp -DskCache -LALL -aALL
3、设置磁盘缓存策略
缓存策略解释：
WT (Write through
WB (Write back)
NORA (No read ahead)
RA (Read ahead)
ADRA (Adaptive read ahead)
Cached
Direct
例子：
MegaCli -LDSetProp WT|WB|NORA|RA|ADRA -L0 -a0
or
MegaCli -LDSetProp -Cached|-Direct -L0 -a0
or
enable / disable disk cache
MegaCli -LDSetProp -EnDskCache|-DisDskCache -L0 -a0
4、创建/删除 阵列
4.1 创建一个 raid5 阵列，由物理盘 2,3,4 构成，该阵列的热备盘是物理盘 5
MegaCli -CfgLdAdd -r5 [1:2,1:3,1:4] WB Direct -Hsp[1:5] –a0
4.2 创建阵列，不指定热备
MegaCli -CfgLdAdd -r5 [1:2,1:3,1:4] WB Direct –a0
4.3 删除阵列
MegaCli -CfgLdDel -L1 –a0
4.4 在线添加磁盘
MegaCli -LDRecon -Start -r5 -Add -PhysDrv[1:4] -L1 -a0
意思是，重建逻辑磁盘组1，raid级别是5，添加物理磁盘号：1:4。重建完后，新添加的物理磁盘会自动处于重建(同步)状态，这个 时候 fdisk -l是看不到阵列的空间变大的，只有在系统重启后才能看见。
5、查看阵列初始化信息
5.1 阵列创建完后，会有一个初始化同步块的过程，可以看看其进度。
MegaCli -LDInit -ShowProg -LALL -aALL
或者以动态可视化文字界面显示
MegaCli -LDInit -ProgDsply -LALL –aALL
5.2 查看阵列后台初始化进度
MegaCli -LDBI -ShowProg -LALL -aALL
或者以动态可视化文字界面显示
MegaCli -LDBI -ProgDsply -LALL -aALL
6、创建全局热备
指定第 5 块盘作为全局热备
MegaCli -PDHSP -Set [-EnclAffinity] [-nonRevertible] -PhysDrv[1:5] -a0
也可以指定为某个阵列的专用热备
MegaCli -PDHSP -Set [-Dedicated [-Array1]] [-EnclAffinity] [-nonRevertible] -PhysDrv[1:5] -a0
7、删除全局热备
MegaCli -PDHSP -Rmv -PhysDrv[1:5] -a0
8、将某块物理盘下线/上线
MegaCli -PDOffline -PhysDrv [1:4] -a0
MegaCli -PDOnline -PhysDrv [1:4] -a0
9、查看物理磁盘重建进度
MegaCli -PDRbld -ShowProg -PhysDrv [1:5] -a0