Comment 2 for bug 1440474

Some more info about my system.

mdadm 3.3-2ubuntu1 amd64

uname -a
Linux Server 3.16.0-34-generic #45-Ubuntu SMP Mon Mar 23 17:21:27 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

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data more related to this problem.

$ sudo mdadm -A -R /dev/md9 /dev/sdi2
mdadm: device 0 in /dev/md9 has wrong state in superblock, but /dev/sdi2 seems ok
mdadm: failed to add /dev/sdi2 to /dev/md9: Invalid argument
mdadm: failed to RUN_ARRAY /dev/md9: Invalid argument
mdadm: Not enough devices to start the array.

sudo mount /dev/sdi2 /mnt/Raid1/
mount: unknown filesystem type 'linux_raid_member'