一、MegaCli命令介紹
MegaCli是一款管理維護硬件RAID軟件，可以用來查看raid信息等
MegaCli 的Media Error Count: 0 Other Error Count: 0
Medai Error Count 表示磁盤可能錯誤，可能是磁盤有壞道，這個值不為0值得注意，數值越大，危險系數越高，
Other Error Count 表示磁盤可能存在松動，可能需要重新再插入。MegaCli 可以對陣列中所有的磁盤進行檢測。
二、安裝過程
1、系統環境
dmidecode -t1 | egrep "Manufacturer|Product Name"
cat /etc/redhat-release
查看廠商和產品型號，以及"Serial Number"
2、下載和安裝
rpm -qa | egrep 'Lib_Utils|MegaCli' //檢查是否安裝
https://raw.githubusercontent.com/crazy-zhangcong/tools/master/MegaCli8.07.10.tar.gz
ftp://download2.boulder.ibm.com/ecc/sar/CMA/XSA/ibm_utl_sraidmr_megacli-8.00.48_linux_32-64.zip
解壓過后有windows和linux兩個目錄
[root@localhost MegaCli8.07.10]# tree
├── Linux
│ ├── Lib_Utils-1.00-09.noarch.rpm
│ ├── MegaCli-8.02.21-1.noarch.rpm
│ ├── readme.txt
│ └── Run-Linux-PERC.sh
└── WINDOWS
├── MegaCli64.exe
├── MegaCli.exe
├── readme.txt
├── X64.bat
└── X86.bat
[root@localhost Linux]# rpm -ivh Lib_Utils-1.00-09.noarch.rpm MegaCli-8.02.21-1.noarch.rpm
[root@localhost Linux]# ln -sv /opt/MegaRAID/MegaCli/MegaCli64 /usr/bin/
"/usr/bin/MegaCli64" -> "/opt/MegaRAID/MegaCli/MegaCli64"
三、硬盤命令使用
1、常用查詢命令
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -aALL 【查raid級別】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpAllInfo -aALL 【查raid卡信息】
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aALL 查看【硬盤信息】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -aAll 【查看電池信息】
/opt/MegaRAID/MegaCli/MegaCli64 -FwTermLog -Dsply -aALL 【查看raid卡日志】
/opt/MegaRAID/MegaCli/MegaCli64 -adpCount 【顯示適配器個數】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpGetTime –aALL 【顯示適配器時間】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpAllInfo -aAll 【顯示所有適配器信息】
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -LALL -aAll 【顯示所有邏輯磁盤組信息】
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aAll 【顯示所有的物理信息】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuStatus -aALL |grep ‘Charger Status’ 【查看充電狀態】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuStatus -aALL【顯示BBU狀態信息】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuCapacityInfo -aALL【顯示BBU容量信息】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuDesignInfo -aALL 【顯示BBU設計參數】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuProperties -aALL 【顯示當前BBU屬性】
/opt/MegaRAID/MegaCli/MegaCli64 -cfgdsply -aALL 【顯示Raid卡型號，Raid設置，Disk相關信息】
2、查看磁盤緩存策略
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -L0 -a0【顯示0 RAID卡 0 RAID組的緩存策略
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -L1 -a0【顯示1 RAID卡 0 RAID組的緩存策略】
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -LALL -a0【顯示所有RAID卡 0 RAID組的緩存策略】
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -LALL –aALL【顯示所有 RAID卡 所有 RAID組的緩存策略】
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -DskCache -LALL -aALL
設置磁盤的緩存模式和訪問方式 （Change Virtual Disk Cache and Access Parameters）
Description Allows you to change the following virtual disk parameters:
-WT (Write through), WB (Write back): Selects write policy.
-NORA (No read ahead), RA (Read ahead), ADRA (Adaptive read ahead): Selects read policy.
-Cached, -Direct: Selects cache policy.
-RW, -RO, Blocked: Selects access policy.
-EnDskCache: Enables disk cache.
-DisDskCache: Disables disk cache.
MegaCli -LDSetProp { WT | WB|NORA |RA | ADRA|-Cached|Direct} |
{-RW|RO|Blocked} |
{-Name[string]} |
{-EnDskCache|DisDskCache} –Lx |
-L0,1,2|-Lall -aN|-a0,1,2|-aALL
MegaCli -LDSetProp WT -L0 -a0
3、設置磁盤緩存策略
顯示磁盤緩存和訪問方式（Display Virtual Disk Cache and Access Parameters）
MegaCli -LDGetProp -Cache | -Access | -Name | -DskCache -Lx|-L0,1,2|
-Lall -aN|-a0,1,2|-aALL
Displays the cache and access policies of the virtual disk(s):
-WT (Write through), WB (Write back): Selects write policy.
-NORA (No read ahead), RA (Read ahead), ADRA (Adaptive read ahead): Selects read policy.
-Cache, -Cached, Direct: Displays cache policy.
-Access, -RW, -RO, Blocked: Displays access policy.
-DskCache: Displays physical disk cache policy.
緩存策略解釋：
WT (Write through)
WB (Write back)
NORA (No read ahead)
RA (Read ahead)
ADRA (Adaptive read ahead)
C (Cached)
D (Direct)
例子：
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp WT|WB|NORA|RA|ADRA -L0 -a0
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -Cached|-Direct -L0 -a0
enable / disable disk cache
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -EnDskCache|-DisDskCache -L0 -a0
4、創建陣列
創建一個raid5陣列，由物理盤2,3,4構成，該陣列的熱備盤是物理盤5
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r5 [1:2,1:3,1:4] WB Direct -Hsp[1:5] -a0
創建陣列，不指定熱備
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r5 [1:2,1:3,1:4] WB Direct -a0
創建一個raid10陣列，由物理盤2,3和4,5分別做raid1，在將兩組raid1做raid0
/opt/MegaRAID/MegaCli/MegaCli64 –CfgSpanAdd –r10 –Array0[1:2,1:3] –Array1[1:4,1:5] WB Direct -a0
5、刪除陣列
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdDel -L1 -a0
6、在線添加磁盤
/opt/MegaRAID/MegaCli/MegaCli64 -LDRecon -Start -r5 -Add -PhysDrv[1:4] -L1 -a0
7、陣列創建完后，會有一個初始化同步塊的過程，可以看看其進度。
/opt/MegaRAID/MegaCli/MegaCli64 -LDInit -ShowProg -LALL -aALL
或者以動態可視化文字界面顯示
/opt/MegaRAID/MegaCli/MegaCli64 -LDInit -ProgDsply -LALL -aALL
8、查看陣列后台初始化進度
/opt/MegaRAID/MegaCli/MegaCli64 -LDBI -ShowProg -LALL -aALL
或者以動態可視化文字界面顯示
/opt/MegaRAID/MegaCli/MegaCli64 -LDBI -ProgDsply -LALL -aALL
9、指定第5塊盤作為全局熱備
/opt/MegaRAID/MegaCli/MegaCli64 -PDHSP -Set [-EnclAffinity] [-nonRevertible] -PhysDrv[1:5] -a0
10、指定為某個陣列的專用熱備
/opt/MegaRAID/MegaCli/MegaCli64 -PDHSP -Set [-Dedicated [-Array1]] [-EnclAffinity] [-nonRevertible] -PhysDrv[1:5] -a0
11、刪除全局熱備
/opt/MegaRAID/MegaCli/MegaCli64 -PDHSP -Rmv -PhysDrv[1:5] -a0
12、將某塊物理盤下線/上線
/opt/MegaRAID/MegaCli/MegaCli64 -PDOffline -PhysDrv [1:4] -a0
/opt/MegaRAID/MegaCli/MegaCli64 -PDOnline -PhysDrv [1:4] -a0
13、查看物理磁盤重建進度
/opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ShowProg -PhysDrv [1:5] -a0
或者以動態可視化文字界面顯示
/opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ProgDsply -PhysDrv [1:5] -a0
14、磁盤狀態的變化，從拔盤，到插盤過程中
Device |Normal|Damage|Rebuild|Normal
Virtual Drive |Optimal|Degraded|Degraded|Optimal
Physical Drive |Online|Failed –> Unconfigured|Rebuild|Online
四、其他命令說明
1、當前raid緩存狀態，raid緩存狀態設置為wb的話要注意電池放電事宜，設置電池放電模式為自動學習模式
/opt/MegaRAID/MegaCli/MegaCli64 -ldgetprop -dskcache -lall -aall
2、電池設置相關
查看電池狀態信息(Display BBU Status Information)
MegaCli -AdpBbuCmd -GetBbuStatus -aN|-a0,1,2|-aALL
MegaCli -AdpBbuCmd -GetBbuStatus -aALL
查看電池容量（Display BBU Capacity Information）
MegaCli -AdpBbuCmd -GetBbuCapacityInfo -aN|-a0,1,2|-aALL
MegaCli -AdpBbuCmd -GetBbuCapacityInfo –aALL
查看電池設計參數(Display BBU Design Parameters)
MegaCli -AdpBbuCmd -GetBbuDesignInfo -aN|-a0,1,2|-aALL
MegaCli -AdpBbuCmd -GetBbuDesignInfo –aALL
查看電池屬性（Display Current BBU Properties）
MegaCli -AdpBbuCmd -GetBbuProperties -aN|-a0,1,2|-aALL
MegaCli -AdpBbuCmd -GetBbuProperties –aALL
設置電池為學習模式為循環模式（Start BBU Learning Cycle）
Description Starts the learning cycle on the BBU.
No parameter is needed for this option.
MegaCli -AdpBbuCmd -BbuLearn -aN|-a0,1,2|-aALL
3、通過腳本檢測RAID 磁盤狀態
MEGACLI="/opt/MegaRAID/MegaCli/MegaCli64 "
$MEGACLI -pdlist -aALL | grep "Firmware state" | awk -F : '{print $2}' | awk -F , '{print $1}'
$MEGACLI -pdlist -aALL | grep -E "Media Error|Other Error" | awk -F : '{print $2}'
4、raid圖解
圖1、圖2
轉自：http://blog.51cto.com/hmtk520/2140657