Comment 21 for bug 1559723

Checking the underlying mdraid with

echo check > /sys/block/md0/md/sync_action

now has finished and it is just fine:

cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sda3[0] sdb3[1]
      2929833792 blocks super 1.2 [2/2] [UU]