Description of problem:

I wanted to try out mdadm Software Raid 1 and assigned two FC LUNs to a test Server and did a standard Setup. After successfull setup i deassigned one of the two LUNs to simulate a desaster szenario. The software raid became unusable.


Version-Release number of selected component (if applicable):

mdadm-3.2.5-4.el6_4.1.i686

How reproducible:


Steps to Reproduce:
1. Assign two fc luns fc-lun1 fc-lun2 
2. create software raid 1: mdadm --create  --verbose /dev/md0 --level=mirror --raid-devices=2 /dev/mapper/fc-lun1 /dev/mapper/fc-lun2 
3. mkfs.ext4  /dev/md0 + mount /dev/md0 /mnt/test
4. deassign one of the luns from step1

Actual results:

- mdadm --detail /dev/md0 ---> does not terminate
- cat /proc/mdstat ---> does not terminate
- /mnt/test is not writable

Expected results:

- raid status info with the commands
mdadm --detail /dev/md0 or
cat /proc/mdstat
- writeble /mnt/test filesystem


Additional info:
words cannot describe my disappointment