I have a server with RAID 1.

Currently when I type in the following command:

cat /proc/mdstat

I get:

Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty] 
unused devices: <none>

What does this mean? The server works fine but why doesn't the RAID array show up here?

  • Are you talking about hardware raid or software raid? If Hardware: what kind of controller make and model? For example, for the MegaRaid series (including Dell PERC 6/7) you could use the MegaCLI tool from LSI to get the data. Hardware raid won't necessarily show up in /proc/mdstat – user145837 Nov 26 '13 at 14:25

This simply means you don't have any configured software raid device in your Linux box. I think you have a hardware raid controller which can not been seen this way.


Potentially your mirror is based on LVM rather then the software raid driver or a hardware raid controller.

lvdisplay --maps 
  • Not the case... "No volume groups found" – Eric Nov 26 '13 at 10:10

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