First, 10 hours for building RAID is longer than normal. Especially you are using 3Ware new controller that should build RAID faster than the old ones. Also, 2 days for migration is also not right.
Did you update your HDD's to the latest firmware? If everything upgraded I will recommend calling 3Ware and clarify with them.
And if you got the 2 missing cables, it seems you are going to have the same long waiting time. So I will start checking and diagnose the problem