I think I see what's going on. I scrounged the dvd+rw-format source for warnings and errors uniquely associated with -force=full, found exactly one, and was able to reproduce it. The media was virgin DVD+RW (or DVD+RW DL). The command was:
> /usr/bin/dvd+rw-format -force=full /dev/sr1 * BD/DVD±RW/-RAM format utility by <[email protected]>, version 7.1. * 4.7GB DVD+RW media detected. - unimplemented command-line option for this media. - you have the option to re-run /usr/bin/dvd+rw-format with: -lead-out to elicit lead-out relocation for better DVD-ROM compatibility, data is not affected; -force to enforce new format (not recommended) and wipe the data. Full formatting DVD+RW media is not implemented because it is not necessary: formatting information is written incrementally, concurrently with data. Normally formatting happens automatically when the burn process starts. While it would be possible to fully format DVD+RW media before any data writing, it would not provide any additional functionality. Furthermore, reformatting severely degrades the rewritability of the media. You may be able to reformat quality media perhaps 10 times, and poor media only a handful of times before it becomes effectively read-only media. For data writing, the media is rewritable in excess of 1000 times. If you are attempting to reformat the media to erase data, writing the format information will NOT zero the data - it still exists and can be recovered with forensic tools. If you want to erase the data, you must 'blank' the media: dvd+rw-format -blank <device> (or you can simply overwrite the data with new data in the usual way). If you have an example of how full formatting of DVD+RW provides useful functionality sufficient to offset the degradation in rewritability, you might convince a developer to implement it. We aim to please :-) -Stuart ** Changed in: dvd+rw-tools (Ubuntu) Status: New => Confirmed ** Changed in: dvd+rw-tools (Ubuntu) Assignee: (unassigned) => Stuart R Balfour (sbalfour) -- -force invalid command line option https://bugs.launchpad.net/bugs/501667 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
