Hi, some technical comments to Nico Zanferrari's notes:
> (I always use a fresh standard live 32 bit USB key with the same DVD-RW) > [...] > - the "unreadable coasters" produced from other Ubuntu versions are seen as > blank disk from standard brasero 12.10, and can be easily blanked with it. > This is different from old versions of brasero that does not recognise it at > all as a DVD medium. If the DVD-RW was recorded with write type DAO and suffered the found bug, then it might afterwards bear an unclosed session, because the pre-announced amount of data was not sent to the drive. libburn qualifies such a medium as "unsuitable" but also offers the opportunity to make it pretend being closed, so that it can be blanked. (Current Brasero git does not bear the necessary call burn_disc_pretend_full(), though.) So it is not sure that this problem is caused by the bug of october 2010. Backporting the fix would be helpful to clarify this. > - the bug (don't ask me why) is quite different on 12.10. Here sometimes you > can have a readable DVD, but never on the first recording! It seems that > it's somehow and sometimes able to record a second recording session on what > it thinks it's a blank disk. Theoretically two half sessions of the same size could fill the pre-announced size of the DAO session. But it is hardly possible that the result bears proper directories or file content. The first block of each pair of 2 KB blocks was not written. Any directory, that occupies more than one block, would become damaged. Any data file that has more than one block would not match its original on disk. Again, backporting the fix and testing the effect would bring more insight. If it turns out that there was another bug which is gone in the current git version of Brasero, then it would be worthwhile to identify the changeset which solved that problem. Have a nice day :) Thomas -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/780117 Title: Brasero finishes without error but unusable media [on-the-fly mode] (Ubuntu 11.04 ->12.04) To manage notifications about this bug go to: https://bugs.launchpad.net/brasero/+bug/780117/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
