The other day, I received some Windows 7 recovery discs from Lenovo warranty services. While I hope to be able to use them again and again for years, they look homemade and not necessarily designed to last. I imagine that some of the discs are bootable while others are not. What are some ways of preserving the data? What I have in mind is something like this: Load the disc into a Linux box and run a checksum on the entire disc. Create an image and save it to the HDD. Run a checksum of the new image and hope it matches the disc's checksum. If the two checksums match, then I know that if I simply save the image somewhere safe, then I will always be able to burn a new copy when needed. I've never actually tried to do that and honestly I don't exactly know how. If there's something wrong with using that method, then an alternative would be to try a direct replication using two drives simultaneously. One drive would contain the original source disc; the other drive would burn to an archival DVD made of gold. Any ideas are welcome and appreciated.