Gigabyte motherboard raid new drive

Boot into the raid bios and tell it to rebuild or if you installed the raid utility that came with your motherboard, you can run it and tell it to rebuild. I'm surprised that it didn't sart rebuilding on it's own as soon as you added the disk into the array - you did do that, right?

Hi, doesn't give me the option to add, only to create a new array, which ofcourse wipes everything.

Check your motherboard manual for the proper rebuild sequence then. It's usually something very similar to what I've already written previously.