mount: unknown filesystem type 'linux_raid_member'

Question

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

thaknks!

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