一、MegaCli命令介绍
MegaCli是一款管理维护硬件RAID软件，可以用来查看raid信息等
MegaCli 的Media Error Count: 0 Other Error Count: 0
Medai Error Count 表示磁盘可能错误，可能是磁盘有坏道，这个值不为0值得注意，数值越大，危险系数越高，
Other Error Count 表示磁盘可能存在松动，可能需要重新再插入。MegaCli 可以对阵列中所有的磁盘进行检测。
二、安装过程
1、系统环境
dmidecode -t1 | egrep "Manufacturer|Product Name"
cat /etc/redhat-release
查看厂商和产品型号，以及"Serial Number"
2、下载和安装
rpm -qa | egrep 'Lib_Utils|MegaCli' //检查是否安装
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
解压过后有windows和linux两个目录
[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、硬盘命令使用
1、常用查询命令
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -aALL 【查raid级别】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpAllInfo -aALL 【查raid卡信息】
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aALL 查看【硬盘信息】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -aAll 【查看电池信息】
/opt/MegaRAID/MegaCli/MegaCli64 -FwTermLog -Dsply -aALL 【查看raid卡日志】
/opt/MegaRAID/MegaCli/MegaCli64 -adpCount 【显示适配器个数】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpGetTime –aALL 【显示适配器时间】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpAllInfo -aAll 【显示所有适配器信息】
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -LALL -aAll 【显示所有逻辑磁盘组信息】
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aAll 【显示所有的物理信息】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuStatus -aALL |grep ‘Charger Status’ 【查看充电状态】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuStatus -aALL【显示BBU状态信息】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuCapacityInfo -aALL【显示BBU容量信息】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuDesignInfo -aALL 【显示BBU设计参数】
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -GetBbuProperties -aALL 【显示当前BBU属性】
/opt/MegaRAID/MegaCli/MegaCli64 -cfgdsply -aALL 【显示Raid卡型号，Raid设置，Disk相关信息】
2、查看磁盘缓存策略
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -L0 -a0【显示0 RAID卡 0 RAID组的缓存策略
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -L1 -a0【显示1 RAID卡 0 RAID组的缓存策略】
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -LALL -a0【显示所有RAID卡 0 RAID组的缓存策略】
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -LALL –aALL【显示所有 RAID卡 所有 RAID组的缓存策略】
/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -DskCache -LALL -aALL
设置磁盘的缓存模式和访问方式 （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、设置磁盘缓存策略
显示磁盘缓存和访问方式（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.
缓存策略解释：
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、创建阵列
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
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r5 [1:2,1:3,1:4] WB Direct -Hsp[1:5] -a0
创建阵列，不指定热备
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r5 [1:2,1:3,1:4] WB Direct -a0
创建一个raid10阵列，由物理盘2,3和4,5分别做raid1，在将两组raid1做raid0
/opt/MegaRAID/MegaCli/MegaCli64 –CfgSpanAdd –r10 –Array0[1:2,1:3] –Array1[1:4,1:5] WB Direct -a0
5、删除阵列
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdDel -L1 -a0
6、在线添加磁盘
/opt/MegaRAID/MegaCli/MegaCli64 -LDRecon -Start -r5 -Add -PhysDrv[1:4] -L1 -a0
7、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。
/opt/MegaRAID/MegaCli/MegaCli64 -LDInit -ShowProg -LALL -aALL
或者以动态可视化文字界面显示
/opt/MegaRAID/MegaCli/MegaCli64 -LDInit -ProgDsply -LALL -aALL
8、查看阵列后台初始化进度
/opt/MegaRAID/MegaCli/MegaCli64 -LDBI -ShowProg -LALL -aALL
或者以动态可视化文字界面显示
/opt/MegaRAID/MegaCli/MegaCli64 -LDBI -ProgDsply -LALL -aALL
9、指定第5块盘作为全局热备
/opt/MegaRAID/MegaCli/MegaCli64 -PDHSP -Set [-EnclAffinity] [-nonRevertible] -PhysDrv[1:5] -a0
10、指定为某个阵列的专用热备
/opt/MegaRAID/MegaCli/MegaCli64 -PDHSP -Set [-Dedicated [-Array1]] [-EnclAffinity] [-nonRevertible] -PhysDrv[1:5] -a0
11、删除全局热备
/opt/MegaRAID/MegaCli/MegaCli64 -PDHSP -Rmv -PhysDrv[1:5] -a0
12、将某块物理盘下线/上线
/opt/MegaRAID/MegaCli/MegaCli64 -PDOffline -PhysDrv [1:4] -a0
/opt/MegaRAID/MegaCli/MegaCli64 -PDOnline -PhysDrv [1:4] -a0
13、查看物理磁盘重建进度
/opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ShowProg -PhysDrv [1:5] -a0
或者以动态可视化文字界面显示
/opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ProgDsply -PhysDrv [1:5] -a0
14、磁盘状态的变化，从拔盘，到插盘过程中
Device |Normal|Damage|Rebuild|Normal
Virtual Drive |Optimal|Degraded|Degraded|Optimal
Physical Drive |Online|Failed –> Unconfigured|Rebuild|Online
四、其他命令说明
1、当前raid缓存状态，raid缓存状态设置为wb的话要注意电池放电事宜，设置电池放电模式为自动学习模式
/opt/MegaRAID/MegaCli/MegaCli64 -ldgetprop -dskcache -lall -aall
2、电池设置相关
查看电池状态信息(Display BBU Status Information)
MegaCli -AdpBbuCmd -GetBbuStatus -aN|-a0,1,2|-aALL
MegaCli -AdpBbuCmd -GetBbuStatus -aALL
查看电池容量（Display BBU Capacity Information）
MegaCli -AdpBbuCmd -GetBbuCapacityInfo -aN|-a0,1,2|-aALL
MegaCli -AdpBbuCmd -GetBbuCapacityInfo –aALL
查看电池设计参数(Display BBU Design Parameters)
MegaCli -AdpBbuCmd -GetBbuDesignInfo -aN|-a0,1,2|-aALL
MegaCli -AdpBbuCmd -GetBbuDesignInfo –aALL
查看电池属性（Display Current BBU Properties）
MegaCli -AdpBbuCmd -GetBbuProperties -aN|-a0,1,2|-aALL
MegaCli -AdpBbuCmd -GetBbuProperties –aALL
设置电池为学习模式为循环模式（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、通过脚本检测RAID 磁盘状态
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图解
图1、图2
转自：http://blog.51cto.com/hmtk520/2140657