Thanks HLouie.
I have already upgraded my Snaps to OSv4. Do you think I should downgrade them to 3 to follow your steps, or could I just install a larger capacity drive and try the 'ide 48bitLBACounter reset' ?
As I mentioned here:
http://forums.procooling.com/vbb/sho...4&postcount=96
When I installed the drives with OSv4, formatting failed.