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MegaCli是一款管理维护硬件RAID软件，可以通过它来了解当前raid卡的所有信息，包括raid卡的型号，raid的阵列类型，raid上各磁盘状态，等等。通常，我们对硬盘当前的状态不太好确定，一般通过机房人员巡检来完成，有没有通过软件的方式来检查确定这个问题呢。MegaCli就可以做到，一般通过MegaCli的MediaErrorCount:0OtherErrorCount:0这两个数值来确定阵列中磁盘是否有问题；MedaiErrorCount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，OtherErrorCount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，我们可以通过脚本的方式来检测相关参数，从而通知管理人员。
一、下载MegCli,目前针对公司DB数据库是IBM的服务器，直接从IBM官方下载，如果
其它服务器的，使用各官方下载或者LSI网站上进行相关下载。一般来说，是通用的。这个包适用32/64位操作系统平台
下载地址：ftp://download2.boulder.ibm.com/ecc/sar/CMA/XSA/ibm_utl_sraidmr_megacli-8.00.48_linux_32-64.zip
二、安装
#unzipibm_utl_sraidmr_megacli-8.00.48_linux_32-64.zip
#cdlinux
#rpm-ivhLib_Utils-1.00-09.noarch.rpmMegaCli-8.00.48-1.i386.rpm
三使用命令及参数
命令使用：
#/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】
3.磁带状态的变化，从拔盘，到插盘的过程中。
Device |Normal|Damage|Rebuild|Normal
Virtual Drive |Optimal|Degraded|Degraded|Optimal
Physical Drive |Online|Failed –> Unconfigured|Rebuild|Online
4.查看磁盘缓存策略
#/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -L0 -a0
or
#/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -L1 -a0
or
#/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -LALL -a0
ro
#/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -Cache -LALL -aALL
ro
#/opt/MegaRAID/MegaCli/MegaCli64 -LDGetProp -DskCache -LALL -aALL
5.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：
#/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp WT|WB|NORA|RA|ADRA -L0 -a0
or
#/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -Cached|-Direct -L0 -a0
or
enable / disable disk cache
#/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -EnDskCache|-DisDskCache -L0 -a0
6.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
7.创建阵列，不指定热备
#/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r5 [1:2,1:3,1:4] WB Direct -a0
8.删除阵列
#/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdDel -L1 -a0
9.在线添加磁盘
#/opt/MegaRAID/MegaCli/MegaCli64 -LDRecon -Start -r5 -Add -PhysDrv[1:4] -L1 -a0
10.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
11.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
12.指定第 5 块盘作为全局热备
#/opt/MegaRAID/MegaCli/MegaCli64 -PDHSP -Set [-EnclAffinity] [-nonRevertible] -PhysDrv[1:5] -a0
13.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
14.删除全局热备
#/opt/MegaRAID/MegaCli/MegaCli64 -PDHSP -Rmv -PhysDrv[1:5] -a0
15.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
16.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
磁带状态的变化，从拔盘，到插盘的过程中：
Device |Normal|Damage|Rebuild|Normal
Virtual Drive |Optimal|Degraded|Degraded|Optimal
Physical Drive |Online|Failed –> Unconfigured|Rebuild|Online
1、查看RAID级别
2、查看RAID卡信息，主要输出RAID卡的一些配置信息
RAID Level : Primary-1, Secondary-0, RAID Level Qualifier-0
Size : 1.086 TB
State : Optimal
Strip Size : 128 KB
Number Of Drives per span:4 //表示每4个物理盘做成一个RAID1盘组
Span Depth : 2 //表示共2个RAID1盘组做成了RAID10
3、查看所有硬盘的信息
/opt/MegaCli64-pdlist–aALL
4、查看当前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
5、raid电池设置相关
查看电池状态信息(DisplayBBUStatusInformation)
MegaCli-AdpBbuCmd-GetBbuStatus-aN|-a0,1,2|-aALL
MegaCli-AdpBbuCmd-GetBbuStatus-aALL
查看电池容量（DisplayBBUCapacityInformation）
MegaCli-AdpBbuCmd-GetBbuCapacityInfo-aN|-a0,1,2|-aALL
MegaCli-AdpBbuCmd-GetBbuCapacityInfo–aALL
查看电池设计参数(DisplayBBUDesignParameters)
MegaCli-AdpBbuCmd-GetBbuDesignInfo-aN|-a0,1,2|-aALL
MegaCli-AdpBbuCmd-GetBbuDesignInfo–aALL
查看电池属性（DisplayCurrentBBUProperties）
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（StartBBULearningCycle）
DescriptionStartsthelearningcycleontheBBU.
Noparameterisneededforthisoption.
MegaCli-AdpBbuCmd-BbuLearn-aN|-a0,1,2|-aALL
设置磁盘的缓存模式和访问方式（ChangeVirtualDiskCacheandAccessParameters）
DescriptionAllowsyoutochangethefollowingvirtualdiskparameters:
-WT(Writethrough),WB(Writeback):Selectswritepolicy.
-NORA(Noreadahead),RA(Readahead),ADRA(Adaptivereadahead):Selectsreadpolicy.
-Cached,-Direct:Selectscachepolicy.
-RW,-RO,Blocked:Selectsaccesspolicy.
-EnDskCache:Enablesdiskcache.
-DisDskCache:Disablesdiskcache.
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-LDSetPropWT-L0-a0
显示磁盘缓存和访问方式（DisplayVirtualDiskCacheandAccessParameters）
MegaCli-LDGetProp-Cache|-Access|-Name|-DskCache-Lx|-L0,1,2|
-Lall-aN|-a0,1,2|-aALL
Displaysthecacheandaccesspoliciesofthevirtualdisk(s):
-WT(Writethrough),WB(Writeback):Selectswritepolicy.
-NORA(Noreadahead),RA(Readahead),ADRA(Adaptivereadahead):Selectsreadpolicy.
-Cache,-Cached,Direct:Displayscachepolicy.
-Access,-RW,-RO,Blocked:Displaysaccesspolicy.
-DskCache:Displaysphysicaldiskcachepolicy.
Megaraid 必知必会 使用LSI的megaraid可以对raid进行有效监控。别的厂商比如HP,IBM也有自己的raid API
MegaCli -ldinfo -lall -aall
查询raid级别，磁盘数量，容量，条带大小。
MegaCli -cfgdsply -aALL |grep Policy
查询控制器cache策略
MegaCli -LDSetProp WB -L0 -a0
设置write back功能
MegaCli -LDSetProp CachedBadBBU -L0 -a0
设置即使电池坏了还是保持WB功能
MegaCli -AdpBbuCmd -BbuLearn a0
手动充电
MegaCli -FwTermLog -Dsply -aALL
查询日志
显示适配器个数： MegaCli -adpCount
显示所有适配器信息： MegaCli -AdpAllInfo -aAll
Critical Disks : 0
Failed Disks : 0
显示所有逻辑磁盘组信息： MegaCli -LDInfo -LALL -aAll
显示所有的物理信息： MegaCli -PDList -aAll
Media Error Count: 0
Other Error Count: 0
查看充电状态： MegaCli -AdpBbuCmd -GetBbuStatus -aALL
Learn Cycle Requested : No
Fully Charged : Yes
显示BBU(后备电池)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
显示Raid卡型号，Raid设置，Disk相关信息： MegaCli -cfgdsply -aALL
查看Cache 策略设置： MegaCli -cfgdsply -aALL |grep -i Policy
Current Cache Policy: WriteBack, ReadAheadNone, Direct, Write Cache OK if Bad BBU
查看充电进度百分比： MegaCli -AdpBbuCmd -GetBbuStatus -aALL
各种设备和磁盘的不同状态：
Device |Normal|Damage|Rebuild|Normal
Virtual Drive |Optimal|Degraded|Degraded|Optimal
Physical Drive |Online|Failed –> Unconfigured|Rebuild|Online
6、通过脚本检测RAID磁盘状态
Linux下脚本
#!/bin/bash #checkraiddiskstatus MEGACLI=/opt/MegaRAID/MegaCli/MegaCli64 $MEGACLI-pdlist-aALL|grepFirmwarestate|awk-F:\'{print$2}\'|awk-F,\'{print$1}\'>/tmp/fireware.log $MEGACLI-pdlist-aALL|grep-EMediaError|OtherError|awk-F:\'{print$2}\'>/tmp/disk.log foriin`cat
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#!/bin/bash
#checkraiddiskstatus
MEGACLI=/opt/MegaRAID/MegaCli/MegaCli64
$MEGACLI-pdlist-aALL|grepFirmwarestate|awk-F:\'{print$2}\'|awk-F,\'{print$1}\'>/tmp/fireware.log
$MEGACLI-pdlist-aALL|grep-EMediaError|OtherError|awk-F:\'{print$2}\'>/tmp/disk.log
foriin`cat
do
if[$i-ne0]
then
curlhttp://xxxxxxB&state=ALARM&description=raid_disk_error
fi
done
foriin`cat
do
if[$i!=Online]
then
curlhttp://xxxxxxstate=ALARM&description=raid_disk_offline
fi
done
Windows下脚本
Windows下脚本用的工具是gnuforwindows平台的一些软件，如bashgrepawkcat
通过bash直接调用脚本
如：G:\\raid_check\\unixtools>bash.exeG:\\disk.sh
#checkraiddiskstatus MEGACLI=//G/raid_check/MegaCli.exe GREP=//G/raid_check/unixtools/grep.exe AWK=//G/raid_check/unixtools/awk.exe CAT=//G/raid_check/unixtools/cat.exe CURL=//G/raid_check/unixtools/curl.exe $MEGACLI-pdlist-aALL|$GREPFirmwarestate|$AWK-F:\'{print$2}\'|$AWK-F,\'{print$1}\'>//c/fireware.log $MEGACLI-pdlist-aALL|$GREP-EMediaError|OtherError|$AWK-F:\'{print$2}\'>//c/disk.log foriin`$CATc:/disk.log` do if[$i-ne0] then $CURLhttp://xxxxxx&description=raid_disk_error fi done foriin`$CATc:/fireware.log` do if[$i!=Online] then $CURLhttp://xxxxx&state=ALARM&description=raid_disk_offline fi
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#checkraiddiskstatus
MEGACLI=//G/raid_check/MegaCli.exe
GREP=//G/raid_check/unixtools/grep.exe
AWK=//G/raid_check/unixtools/awk.exe
CAT=//G/raid_check/unixtools/cat.exe
CURL=//G/raid_check/unixtools/curl.exe
$MEGACLI-pdlist-aALL|$GREPFirmwarestate|$AWK-F:\'{print$2}\'|$AWK-F,\'{print$1}\'>//c/fireware.log
$MEGACLI-pdlist-aALL|$GREP-EMediaError|OtherError|$AWK-F:\'{print$2}\'>//c/disk.log
foriin`$CATc:/disk.log`
do
if[$i-ne0]
then
$CURLhttp://xxxxxx&description=raid_disk_error
fi
done
foriin`$CATc:/fireware.log`
do
if[$i!=Online]
then
$CURLhttp://xxxxx&state=ALARM&description=raid_disk_offline
fi