RAID issues in Ubuntu
Short article on raid issues in Ubuntu
Raid issues ubuntu
If your pc starts ticking at boot time or just locks at boot time. It might be that your raid device has some boot problems. To fix do the following.
sudo mdadm --detail /dev/md0
copy the UUID at replace it in /etc/mdadm/mdadm.conf the last step is to update initrd. use the command:
sudo dpkg-reconfigure mdadm