Can not create system image on DVD

I built  a computer and got  the software where I want it.  I have RAID 5.  When I attempt to image onto DVD disks, I receive the following message: E:\Henry-desktop_System Reserved 0-1 Drive v2i could not be opened Error ED800019 (MUM:v-0-3456-25).  It

displays at the 5% point. I am using the "One time backup" feature. "E" is my DVD