I'm having the same problem when adding a new 3TB drive. I tried one old 1TB drive alongside the new drive, and it hung. Then I tried just the new drive and I got the error 17. The blue light is blinking, which might mean that it is actually formatting and incorrectly reporting the error. I'll wait and see if the light stops blinking by tomorrow.
This is an old topic, but did anyone ever get a resolution to it? I'd hate to think I wasted money on two new drives.
Thank you.