megacli的安裝
通過如下鏈接
http://down.51cto.com/data/2042596
或者
http://pan.baidu.com/s/1eQ2FeHc
下載至windows本地桌面，然後在linux命令行用命令：rz -be ，在彈出的窗口中選擇剛纔下載的壓縮包（注意不要勾選已ASCII碼方式傳送文件）
tar xf megacli-8.02.21-1-mdv2012.0.x86_64.rpm.tar
rpm -ivh megacli-8.02.21-1-mdv2012.0.x86_64.rpm
默認yum源木有，爲了安裝方便，可以手工添加到本地yum源，以後安裝就可以執行如下命令：
yum install megacli -y （關於本地yum源的搭建，請移步本地yum源搭建）
一、查看Raid卡信息
megacli -LDInfo -Lall -aALL
[root@ robin]# megacli -LDInfo -Lall -aALL
OSSpecificInitialize: Failed to load libsysfs.so.2.0.2 Please ensure that libsfs is present in the system.
The dependent library libsysfs.so.2.0.1 not available. Please contact LSI for distribution of the package
Adapter 0 -- Virtual Drive Information:
Virtual Drive: 0 (Target Id: 0)
Name :
RAID Level : Primary-1, Secondary-0, RAID Level Qualifier-0
Size : 930.5 GB
Mirror Data : 930.5 GB
State : Optimal <<<< 這是正常的狀態。
Strip Size : 64 KB
Number Of Drives per span:2 <<<< RAID組包含2塊磁盤（但實際是4塊500G的SSD做Raid10）。
Span Depth : 2 <<<< 深度若是1，說明實際只是RAID 1。2表示可以是RAID 10
Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Default Access Policy: Read/Write
Current Access Policy: Read/Write
Disk Cache Policy : Disk's Default
Ongoing Progresses:
Background Initialization: Completed 41%, Taken 190 min.
Encryption Type : None
Default Power Savings Policy: Controller Defined
Current Power Savings Policy: None
Can spin up in 1 minute: No
LD has drives that support T10 power conditions: No
LD's IO profile supports MAX power savings with cached writes: No
Bad Blocks Exist: No
Is VD Cached: No
備註：
RAID型號對應表信息如下：
RAID Level : Primary-1, Secondary-0, RAID Level Qualifier-0" #代表Raid 1
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0" #代表Raid 0
RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3" #代表Raid 5
RAID Level : Primary-1, Secondary-3, RAID Level Qualifier-0" #代表Raid10
二、查看硬盤信息：
[root@ robin]# megacli -PDList -aALL
###有如下樣式的幾段，說明實際有幾塊硬盤（下面是一塊500G的SSD的信息）
Enclosure Device ID: 32
Slot Number: 3
Drive's postion: DiskGroup: 0, Span: 1, Arm: 1
Enclosure position: 0
Device Id: 3
WWN: 50025388A0061518
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA
Raw Size: 465.761 GB [0x3a386030 Sectors]
Non Coerced Size: 465.261 GB [0x3a286030 Sectors]
Coerced Size: 465.25 GB [0x3a280000 Sectors]
Firmware state: Online, Spun Up
Device Firmware Level: BB0Q
Shield Counter: 0
Successful diagnostics completion on : N/A
SAS Address(0): 0x4433221107000000
Connected Port Number: 3(path0)
Inquiry Data: S1DHNSADA04008B Samsung SSD 840 EVO 500GB EXT0BB0Q
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: Solid State Device
Drive: Not Certified
Drive Temperature :32C (89.60 F)
PI Eligibility: No
Drive is formatted for PI information: No
PI: No PI
Drive's write cache : Disabled
Drive's NCQ setting : Disabled
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No
關於這個工具的更多的使用方法，請移步：
http://www.ttlsa.com/tools/megacli-tool-query-raid-status/
轉載自http://tenderrain.blog.51cto.com/9202912/1639865