I used those cheap medias to do high speed dubbing of the stuffs stored on the HDD of the Panny recorder. Everytime halfway, the machine will just switch off by itself and restart again saying an error has encountered and asked me to check the disc. I tried 3 disc and gave me the same problem. This problem did not apper when i am doing realtime dubbing using the same cheap media. I then tried the more expensive media and nothing goes wrong. Was wondering is Panny choosy abt which media i use for high speed dubbing? people out there encounted the same problem as me?