It isn't the RAID level you need to worry about, but the RAID controller. If you created an Acronis Rescue/Boot disk, try booting from it and see if it recognizes your RAID controlller. If it does, your drives should appear normal. If all looks well, you can then proceed with your backup or whatever you are trying to do with acronis.
You can also check out the Acronis forum or Acronis support if you have registered your product. They have been good at helping me in the past.