with one disconnected

itservice@itservice-P5E-VM-HDMI:~$ sudo mdadm --detail /dev/md0
[sudo] password for itservice:
/dev/md0:
        Version : 1.2
     Raid Level : raid0
  Total Devices : 1
    Persistence : Superblock is persistent

          State : inactive

           Name : itservice-P5E-VM-HDMI:0  (local to host itservice-P5E-VM-HDMI)
           UUID : 84c1e3e4:e76b57d1:bb1f88d3:481b1ceb
         Events : 4841

    Number   Major   Minor   RaidDevice

       -       8       17        -        /dev/sdb1
itservice@itservice-P5E-VM-HDMI:~$ nano /etc/mdadm/mdadm