What size partition or drive are you trying to image, and will it fit on 1 DVD? You likely need to insert another blank DVD if image will be larger than 4.7 GB if using DVD5 media. If Ghost 8 is similar to my Ghost 2003 you'll also need to click "Options" before beginning image creation and check the "Span" option if image requires more than 1 disk. Another simpler alternative IMO is to create the image to a hard drive folder that's not on the 1 being imaged if you have another drive/partition besides the 1 being imaged.