Il giorno gio, 20/04/2006 alle 14.53 +0100, Paul Smith ha scritto: > On 4/20/06, Robin Laing <Robin.Laing@xxxxxxxxxxxxxxx> wrote: > > If you have the original ISO, then you can do a checksum of the images. > > Or mount the DVD and do a checksum of the individual files. > > What do you have for a reference to compare to? > Thanks, Robin. Actually, I do not have the originals. Someone recorded > them for me on DVD+RW disks and for some of them vobcopy does not > work, but it does work for one of them. Then, I am suspecting that the > ones that fail with vobcopy are badly recorded. Or simply there is an incompatibilty between the disk (and it's surface) and the laser in the dvd reader. I have at least 15/20 dvds burned on a machine, perfectly working on 4 of the 5 pc i have access to and that simply do not get recorgnized by the 5th. In the m$ world, btw, there are a number of utilities which can check out the number of "read errors" or "bad crc", but they only refer to the Orange books & similar about the standard of disk type. They not guarrantee you'll see the file ... -- nicola .:kOoLiNuS:. losito http://koolinus.wordpress.com http://www.koolinus.net "If privacy is outlawed, only outlaws will have privacy." Linux Registered User #293182