Linux系统下一个冷门的RAID卡ioc0及其监控mpt-status
新接手了一台Linux服务器，准备检查是否有配置RAID。参考（http://mip.0834jl.com）
先查看是否有RAID卡：
复制代码 代码如下:
# dmesg|grep -i raid
mptsas: ioc0: attaching raid volume, channel 1, id 0
device-mapper: dm-raid45: initialized v0.2594l
md: Autodetecting RAID arrays.
很明显是有的，只是无法确定RAID卡的类型是ioc0还是dm-raid45，于是开始百度。后来找到了这样一个工具：mpt-status，而且在下载界面里，有这样几句话：
mpt-status: get status of LSI 1030 RAID (mptlinux, fusion, mpt, ioc) controller
This driver has many names. As best I understand their use:
LSI 1030
The make and model of the controller
mptlinux
The name of the driver distribution. /proc/mpt/version might say, for example, mptlinux-2.05.11.03.
Fusion
The trade name for the chipset (?). The driver distribution, though called mptlinux, actually lives in drivers/message/fusion.
mpt
Message Passing Technology; the prefix used for all things that related to the driver. The /proc device is /proc/mptctl, for example.
ioc
The name of the controller within Linux. For example the first controller is ioc0.
大意是说LSI 1030 RAID卡有很多个名字，ioc是其中之一。这刚好与之前dmesg的结果吻合。因此基本上可以确定RAID卡的类型是ioc0，属于LSI的产品，可以用mpt-status来对其进行监控。
mpt-status下载地址：http://sven.stormbind.net/mpt-status-rhel/
接着下载安装：rpm -ihv mpt-status-1.2.0_RC7-3.i386.rpm
建立字符设备：mknod /dev/mptctl c 10 220
加载内核模块mptctl：modprobe mptctl
查看RAID状态：
复制代码 代码如下:
# mpt-status
ioc0 vol_id 0 type IM, 2 phy, 465 GB, state OPTIMAL, flags ENABLED
ioc0 phy 1 scsi_id 8 ATA WDC WD5002ABYS-1 3B04, 465 GB, state ONLINE, flags NONE
ioc0 phy 0 scsi_id 1 ATA WDC WD5002ABYS-1 3B04, 465 GB, state ONLINE, flags NONE
可以看出，该RAID由两块465G的物理硬盘组成，状态良好。可问题是，RAID级别是多少(0，1，5...)呢?
于是接着百度。
但这次没有结果。
后来在mpt-status的文档(/usr/share/doc/mpt-status-1.2.0_RC7/FAQ )里看到这样一句话：
> 1) Could you tell me from example #1, #2 and #3 where can you see the Raid Level of each hard disk ?
好激动，这不就是我要问的问题吗?再看看答案：
The raid level is not visible, would you like to get this information as well? Or do you want to extract the health state of each disk?
尼玛，回答跟没回答一样...
