Damaged linear raid

Hi guys, Thanks to administrators for agreeing my signing up request.
I'm using OMV 2.2.14 (Stone Burner).
Suddenly I can't see my linear raid anymore so i can't access my files. Is there a way for recovering all my files?
In the physical disks attached image, you can see all my disks:Samsung disk is for operative system, sdb, sdc and sdd is a linear raid that doesn't works anymore. The last disk (sde) correctly works.
In file systems image attached there is the corrupt file system that does not allow me accessing to my files.
Any suggestions?

Thanks

The content of "# cat /proc/mdstat" is:

Personalities : [linear]
md0 : inactive sde[2] sdd[3]
556769792 blocks super 1.2

unused devices: <none>

How can I activate the raid?