MegaCli 简单介绍
MegaCli是LSI公司官方提供的SCSI卡管理工具。由于被收购变成了现在的Broadcom，所以现在想下载MegaCli，需要去Broadcom官网查找Legacy产品支持，搜索MegaRAID。
它一款用于管理维护硬件RAID软件，可以查看当前raid卡的所有信息：raid卡的型号，raid的阵列类型，raid 的磁盘状态；
可以对raid进行管理：在线添加磁盘，创建磁盘阵列、删除阵列等。
磁盘状态
Unconfigured Good ：未配置好。 RAID控制器可访问的驱动器，但未配置为虚拟驱动器或热备分
Online：在线
Rebuild ：重建。写入数据的驱动器，以恢复虚拟驱动器的完全冗余
Failed ：失败
Unconfigured Bad：未配置的坏-驱动器上的固件检测不可恢复的错误；驱动器无法初始化Unconfigured Good或驱动器
Missing：失踪。在线驱动，但已从其位置移除
Offline：脱机-驱动器是虚拟驱动器的一部分，但在RAID中具有无效数据或未配置。
Hot Spare：热备份
None：具有不支持标志集的驱动器。具有未配置的良好或离线驱动器，完成了搬迁作业的准备工作。
RAID 级别对应关系
RAID Level : Primary-1, Secondary-0, RAID Level Qualifier-0 RAID 1
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0 RAID 0
RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3 RAID 5
RAID Level : Primary-1, Secondary-3, RAID Level Qualifier-0 RAID 10
安装 MegaRAID
【1】下载安装包
wget ftp://download2.boulder.ibm.com/ecc/sar/CMA/XSA/ibm_utl_sraidmr_megacli-8.00.48_linux_32-64.zip
【2】 安装
unzip ibm_utl_sraidmr_megacli-8.00.48_linux_32-64.zip
cd linux
yum localinstall Lib_Utils-1.00-09.noarch.rpm MegaCli-8.00.48-1.i386.rpm
常见参数
一般通过 MegaCli 的Media Error Count 、Other Error Count、Predictive Failure Count来确定阵列中磁盘是否有问题
Slot Number：slot号，应该跟机器外观上的标识一致。（磁盘位置）
Inquiry Data: 磁盘的序列号，跟磁盘标签上一致。（磁盘标签需要拔盘才能看到）
Firmware state: 这磁盘的状态，Online是最好的状态，除此之外还有 Unconfigured Offline Failed
Medai Error Count 不为0，表示磁盘可能错误，可能是磁盘有坏道，数值越大，危险系数越高
Other Error Count 不为0，表示磁盘可能存在松动，可能需要重新再插入
Predictive Failure Count：表示监控硬盘的预报错误数量，不为0要更换
Last Predictive Failure Event Seq Number：最后一条预警的时间序列号
Raw Size：磁盘大小
Firmware state：磁盘目前的状态。
MegaCli常用命令
【1】查raid级别
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -aALL
Adapter 0 -- Virtual Drive Information:
Virtual Drive: 0 (Target Id: 0)
Name :Virtual Disk 00
RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3
Size : 1.818 TB
State : Optimal
Strip Size : 64 KB
Number Of Drives : 3
Span Depth : 1
Default Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write Cache if Bad BBU
Access Policy : Read/Write
Disk Cache Policy : Enabled
Encryption Type : None
Number of Dedicated Hot Spares: 1
0 : EnclId - 32 SlotId - 3
Exit Code: 0x00
MegaCli64 -LdPdInfo -aALL 级别和磁盘
MegaCli64 -PDList -aALL
Adapter #0
Number of Virtual Disks: 1
Virtual Drive: 0 (Target Id: 0)
Name :Virtual Disk 00
RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3
Size : 1.818 TB
State : Optimal
Strip Size : 64 KB
Number Of Drives : 3
Span Depth : 1
Default Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write Cache if Bad BBU
Access Policy : Read/Write
Disk Cache Policy : Enabled
Encryption Type : None
Number of Spans: 1
Span: 0 - Number of PDs: 3
PD: 0 Information
Enclosure Device ID: 32
Slot Number: 0
Enclosure position: 0
Device Id: 0
Sequence Number: 2
Media Error Count: 0
Other Error Count: 13
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA
Raw Size: 931.512 GB [0x74706db0 Sectors]
Non Coerced Size: 931.012 GB [0x74606db0 Sectors]
Coerced Size: 931.0 GB [0x74600000 Sectors]
Firmware state: Online, Spun Up
SAS Address(0): 0x1221000000000000
Connected Port Number: 0(path0)
Inquiry Data: Z9AE3WLXST1000DM010-2EP102 CC43
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: Unknown
Link Speed: Unknown
Media Type: Hard Disk Device
Drive Temperature : N/A
PD: 1 Information
Enclosure Device ID: 32
Slot Number: 1
Enclosure position: 0
Device Id: 1
Sequence Number: 2
Media Error Count: 0
Other Error Count: 13
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA
Raw Size: 931.512 GB [0x74706db0 Sectors]
Non Coerced Size: 931.012 GB [0x74606db0 Sectors]
Coerced Size: 931.0 GB [0x74600000 Sectors]
Firmware state: Online, Spun Up
SAS Address(0): 0x1221000001000000
Connected Port Number: 1(path0)
Inquiry Data: Z9AE3WRXST1000DM010-2EP102 CC43
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: Unknown
Link Speed: Unknown
Media Type: Hard Disk Device
Drive Temperature : N/A
PD: 2 Information
Enclosure Device ID: 32
Slot Number: 2
Enclosure position: 0
Device Id: 2
Sequence Number: 2
Media Error Count: 0
Other Error Count: 13
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA
Raw Size: 931.512 GB [0x74706db0 Sectors]
Non Coerced Size: 931.012 GB [0x74606db0 Sectors]
Coerced Size: 931.0 GB [0x74600000 Sectors]
Firmware state: Online, Spun Up
SAS Address(0): 0x1221000002000000
Connected Port Number: 2(path0)
Inquiry Data: Z9AE1RN0ST1000DM010-2EP102 CC43
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: Unknown
Link Speed: Unknown
Media Type: Hard Disk Device
Drive Temperature : N/A
Exit Code: 0x00
相关参数
Enclosure Device过滤出raid卡的ID；
Slot Number过滤出磁盘的槽号；
Raw Size过滤出磁盘的大小；
Inquiry Data 过滤出磁盘的序列号、型号固件版本；
Firmware state过滤出磁盘的状态
Adapter 0-- Virtual Drive Information:
VirtualDrive: 0 (Target Id: 0) ----设备VD号
Name :
RAIDLevel : Primary-5, Secondary-0,RAID Level Qualifier-3 ----raid级别
Size : 7.276 TB -----逻辑磁盘大小
State : Optimal -----状态：最佳
StripSize : 256 KB -----簇的大小
Number OfDrives : 3
SpanDepth : 1
DefaultCache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU ----默认缓存策略
CurrentCache Policy: WriteThrough, ReadAhead, Direct, No Write Cache if Bad BBU -----当前缓存策略
AccessPolicy : Read/Write -----存取策略
DiskCache Policy : Disk's Default -----磁盘缓存策略
EncryptionType : None
BadBlocks Exist: No
RAID Level对应关系：RAID级别一般通过 Primary 字段值来判断
还需要结合Span Depth的值来判断值为1表示为 RAID-1，不为1表示 RAID-10; 还有一种情况：Primary-1， Secondary-3， RAID LevelQualifier-0 也是表示 RAID-10;
RAIDLevel : Primary-0, Secondary-0, RAID Level Qualifier-0 对应RAID 0
RAIDLevel : Primary-1, Secondary-0, RAID Level Qualifier-0 对应RAID 1
RAIDLevel : Primary-5, Secondary-0, RAID Level Qualifier-3 对应RAID 5
RAIDLevel : Primary-1, Secondary-3, RAID Level Qualifier-0 对应RAID 10
【2】查raid卡信息
/opt/MegaRAID/MegaCli/MegaCli64 -AdpAllInfo -aALL
【3】查看硬盘信息
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aALL
MegaCli64 -PDList -aALL
【4】查看raid卡日志
/opt/MegaRAID/MegaCli/MegaCli64 -FwTermLog -Dsply -aALL
【5】显示Raid卡型号，Raid设置，Disk相关信息
/opt/MegaRAID/MegaCli/MegaCli64 -cfgdsply -aALL
【6】显示所有逻辑磁盘组信息
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -LALL -aAll
1.查看RAID控制器的数量：-----raid卡管理要用到
MegaCli64 -adpCount
图中看出RAID控制器的数量为1
