On Wed, 15 Mar 2006 15:55:17 -0700 Joseph wrote: > On Thu, 2006-03-16 at 11:19 +1300, Nick Rout wrote: > > On Wed, 15 Mar 2006 15:04:06 -0700 > > Joseph wrote: > > > > > > > If I use: > > > > > dd if=/dev/dvd of=backup.iso > > > > > > > > First of all, I would add the "bs" option to increase the buffer and > > > > therefore > > > > speed. Something like: > > > > dd bs=100000 if=/dev/dvd of=backup.iso > > > > > > No, this command didn't work either, I got about 700Mb and it quit, > > > though the light in the drive was flashing nothing was copied to ISO > > > file. > > > > > > > > > > > > I only get about 2Gb file and it stops or freezes, the disk is bout > > > > > 4.3Gb > > > > > > > > That would indicate read errors. Is the dvd scratched or dirty? Wash it > > > > with > > > > lukewarm water and dishwasher liquid and try again. > > > > > > DVD is brand new, no scratches. > > > > could be the reader then? Do you have another computer with a dvd drive > > and 4.7g available space? > > Yes, I've tired on two different systems, one is x86 and the other amd64 > with similar result on both of them; the copying stops at some point and > doesn't go any further. > One system has Philips DVD drive and the other one has BenQ DVD > > I can burn perfect DVD every time but getting it back in form of ISO > from DVD is a pain - IMPOSSIBLE. > > > these things are fiddly, there are billions of little holes and a laser > > light reading them. There are manufacturing tolerances in the reader and > > the disk. There are imperfect firmwares in the drives. In short, > > sometimes a particular disk and a particular drive just don't get on. > > The drives also get old and tired. IMHO you need to be prepared to throw > > the drive out after some indeterminate (but not long enough) period and > > get a new one. > > > > Is this a movie or data? Have you tried just mounting then copying the > > files to your hard drive. This might identify where on the disk things > > are going wrong. If it is a small or unimportant file you might still > > have an effective backup. > > I can mount the DVD without any problems. I created the DVD using > dvd-slideshow and it worked perfectly. > I can rip VOB's from the DVD using k3b or dvdrip; works in both > programs. > So I can recreate the DVD but what bugs me that I can not make a backup > to an ISO file using command line.
OK I see you have considered most of the possibilities i considered. how about: mount /dev/dvd /mnt/dvd mkisofs -o mydvd.iso /mnt/dvd (disclaimer, other options might be needed. is mkisofs even the right program for dvd's? k3b is making me lazy) > > -- > #Joseph > -- > gentoo-user@gentoo.org mailing list -- Nick Rout <[EMAIL PROTECTED]> -- gentoo-user@gentoo.org mailing list
