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...