I hope you are using the Web Admin to create the RAID.
Yes, I wouldn't do it any other way
I have an existing 1TB raid one array which I am removing (in web admin) and replacing with a raid five using an additional 1TB drive.
You will be able to carry over your Software RAID. And in 0810, you will have even more functionality in the web admin for your RAID.
That's great news. Thanks for the info.