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recently we have a server crash, so we decided to mount a RAID 1 in our server. so we asked to the hosting, they told us that was needed to reinstall all the system again. so we make it, and now i have the doubt if the RAID is really working.

how can i know this? we are running debian lenny 64 bits and the raid is supposed to be running by software.

Regards, Shadow.

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up vote 1 down vote accepted

Do you run on bare metal or do you have a VM? If you run on a dedicated server, just run

cat /proc/mdstat

and you will see if you have a raid.

Inside a VM I don't think it is possible (you just get a software block device from the host in all cases, unless they give you a block device per physical disk). You can try with a benchmark and compare the results with known single disk and RAID data.

To check for hardware raid, you can use smartmontools. If you do have a raid, you will not get SMART data running

sudo smartctl -A /dev/sda
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say that the folder do not exist, and yes, is a dedicated server. – shadow_of__soul Sep 21 '10 at 20:27
If you do not have /proc/mdstat, then you do not have software RAID. – Dan Andreatta Sep 21 '10 at 20:50
many thanks for the help :D – shadow_of__soul Sep 21 '10 at 21:02

Pull the hard drive out. Is the server still running? Then you're using RAID.

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This made me laugh :p – Lucas Kauffman Jul 22 '12 at 12:06

In addition to md there is the software RAID known as "fakeraid." Try running dmraid -r as root.

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cat /proc/mdstat

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