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。
先查看是否有raid卡:
# 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:
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:
# 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...
接着往下看。终于,在文档的最后,给出来了答案:
> is=?
integrated striping (raid 0)
> im=?
integrated mirroring (raid 1)
即mpt-status输出的type表示raid级别。如上例中的:
ioc0 vol_id 0 type im, 2 phy, 465 gb, state optimal, flags enabled
表示raid1。
最后附上mpt-status的rpm包。
mpt-status 下载地址: