I have Suse Linux 12.1 and i am trying to mount a single RAID 1 disk, to explore the files in it. However when mounting it:

 # mount /dev/sdc1 /mnt/test
  mount: unknown filesystem type 'linux_raid_member' 

I started reading around and many advised to just force the filessystem type

  # mount -t ext4 /dev/sdc1 /mnt/test
  mount: /dev/sdc1 already mounted or /mnt/test busy

when trying

 umount /dev/sdc1                 
 umount: /dev/sdc1: not mounted

Could someone provide some advise?

I am running my machines insed an ESXI server and it is a virtual disk. However this should not play, as this disks are not used by any other machines


  • can you please post the output of fdisk -l ?
    – Feiticeir0
    Apr 26, 2012 at 10:52

1 Answer 1


You should not mount it directly using mount. You need first to run mdadm to assemble the raid array. A command like this should do it:

$ mdadm --assemble --run /dev/md0 /dev/sdc1

If it refuses to run the array because it will be degraded, then you can use --force option. This is assuming you don't have /dev/md0 device. Otherwise, you need to change this name.

When this command is executed successfully, you can mount the created device normally using:

$ mount /dev/md0 /mnt/test
  • In my case it does not work when I take 1 HDD only. Before is RAID 1 for 2 HDD
    – tquang
    Jan 20, 2015 at 1:36
  • @tquang: Can you post the error message?
    – Khaled
    Jan 20, 2015 at 8:05
  • How do you 'remove' the created /dev/md* ?
    – quimnuss
    Jun 12, 2015 at 13:15
  • 1
    @quimnuss: You can use mdadm --stop /dev/mdx
    – Khaled
    Jun 13, 2015 at 7:11
  • 11
    If anyone still gets the mdadm: /dev/sdb1 is busy - skipping message you can stop the device on with mdadm --stop /dev/mdx or check the /proc/mdstat to check if the device was automatically mount by your system.
    – Jorge V.
    Nov 27, 2015 at 16:29

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .