命令行创建硬Raid

sky

  今天遇到这个事，服务器不能停，新加的2块硬件要做Raid1，说实在的以前都是重启后进Raid的配置界面来做，这不停机的还真没做过，所以就在网上找啊找的，还好找到了。
   不过现在这台服务器使用的是Debian的系统（wheezy），所以需要添加源deb http://hwraid.le-vert.net/debian wheezy main。
  官方网站给的建议配置是
We provide a Debian repository containing all packages to install
proprietary and opensource tools for you RAID card.

Please add deb http://hwraid.le-vert.net/distrib branch main to
/etc/apt/sources.list to access all packages.

distrib can be either debian or ubuntu.
branch can be lenny, squeeze, wheezy and sid for debian, or hardy,
intrepid, jaunty and lucid for ubuntu.

In example, for current Debian stable release (Wheezy):
deb http://hwraid.le-vert.net/debian wheezy main

Theses packages are available for amd64 and i386 architectures. Sources
packages are available as well (replace deb with deb-src).


GPG signatures

Packages are now signed, please run the following command after adding
the repository to sources.list:

wget -O - http://hwraid.le-vert.net/debian/hwraid.le-vert.net.gpg.key |
sudo apt-key add -

我们添加完源后可以直接下载安装  apt-get install megacli
然后需要查看下物理磁盘信息 megacli -PDList -aALL
如下：
Adapter #0
  
Enclosure Device ID: 32
Slot Number: 5
Drive's position: DiskGroup: 1, Span: 0, Arm: 1
Enclosure position: 1
Device Id: 5
WWN: 5000CCA028561227
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS

Raw Size: 1.819 TB [0xe8e088b0 Sectors]
Non Coerced Size: 1.818 TB [0xe8d088b0 Sectors]
Coerced Size: 1.818 TB [0xe8d00000 Sectors]
Sector Size: 0
Firmware state: Online, Spun Up
Device Firmware Level: W1CG
Shield Counter: 0
Successful diagnostics completion on : N/A
SAS Address(0): 0x5000cca028561225
SAS Address(1): 0x0
Connected Port Number: 4(path0)
Inquiry Data: HGST HUS724020ALS640 W1CGP6HJADVV
FDE Capable: Not Capable
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: Hard Disk Device
Drive Temperature :39C (102.20 F)
PI Eligibility: No
Drive is formatted for PI information: No
PI: No PI
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Port-1 :
Port status: Active
Port's Linkspeed: Unknown
Drive has flagged a S.M.A.R.T alert : No

接下来根据这些信息来创建raid1
MegaCli -CfgLdAdd -r1 [32:4,32:5] WB Direct -a0

这几个参数解释为：
-r1 raid1
[32:5]
Enclosure Device ID: 32
Slot Number: 5

WB ：磁盘缓存策略 write back
-a0 :阵列卡序号