Sometimes, the computer prompts you to insert a disc even after you have already inserted it. For example, Disc 1 has completed, and you are prompted to insert Disc 2. After inserting Disc 2, the prompt to insert disc 2 displays again.
If this happens, make sure the disc you are inserting is the correct disc. If it is, reinsert the disc. You might have to reinsert the disc many times before the recovery software recognizes that the correct disc is in the drive. Continue reinserting the disc until the message stops and the recovery process continues.
In rare cases, a disc set might be mislabeled. Insert a different disc that you have not already used until the message stops and the recovery process continues.