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Accepted
Tedd Johnson
Asked: 2010-02-09 12:14:04 +0800 CST

How to determine if a CentOS system is Raid-1?

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I've tried searching for this answer, but haven't found anything elegant.

I have numerous servers in a colo that is in another state. I need to find a way to check that the servers have RAID-1 on them, so that I can determine if they were setup correctly by my colo.

df -h shows: Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 442G 1.5G 418G 1% / /dev/sda1 99M 19M 75M 20% /boot tmpfs 4.0G 0 4.0G 0% /dev/shm

however as CentOS uses LVM by default, this doesn't indicate if a RAID-1 is present.

it is supposed to be a software raid, so I'm pretty sure there should be a way to check.

Thanks

centos raid1

3 Answers

  1. Best Answer

    cat /proc/mdstat will give you raid usage on your machine

    dmesg | grep raid will tell you if raid is enabled in your kernel

    • 4

  2. I think I found the answer right after I asked.

    dmraid -r should do what I'm looking for.

    • 0

  3. Hai

    when i try this command

    [root@localhost ~]# dmraid -r

    My result is :

    [root@localhost ~]# dmraid -r /dev/sda: isw, "isw_dhefccahba", GROUP, ok, 976773165 sectors, data@ 0 /dev/sdb: isw, "isw_dhefccahba", GROUP, ok, 976773165 sectors, data@ 0

    What is the meaning of above results

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