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. -- #Joseph -- gentoo-user@gentoo.org mailing list
