Blank formatted DVD+RW discs are not recognized in Lucid [LUCID]
Bug #578640 reported by
FrenchNux
This bug report is a duplicate of:
Bug #581925: cdrom_id: Does not recognize reblanked DVD+RW, DVD-RW and DVD-RAM.
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This bug affects 3 people
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| udev (Ubuntu) |
New
|
Undecided
|
Ubuntu Bugs | ||
Bug Description
Hello,
DVD+RW erased aren't detected and not mounted but they appear in disc utility
Revision history for this message
| FrenchNux (christophe-pauc) wrote | #1 |
| Changed in ubuntu: | |
| assignee: | nobody → Ubuntu Bugs (ubuntu-bugs) |
| summary: |
- DVD-RW erased is not detected and not mounted + DVD-RW erased is not detected and not mounted [LUCID] |
| affects: | ubuntu → udev (Ubuntu) |
Revision history for this message
| jonie (jonie) wrote | #2 |
| summary: |
- DVD-RW erased is not detected and not mounted [LUCID] + Blank formatted DVD+RW discs are not recognized in Lucid [LUCID] |
Revision history for this message
| FrenchNux (christophe-pauc) wrote | #3 |
Revision history for this message
| Martin Pitt (pitti) wrote | #4 |
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When I insert a blanked DVD+RW disc it does neither show in the Computer folder nor is recognized in cd/dvd assistant/brasero as a writable disc. I observed the issue on two different computers, one running 64-bit Lucid with HL-DT-ST GSA-H10N and the other running 32-bit Lucid with Matshita UJ-841S. The cdrom_id utility report the disc status as complete although it's empty.
The problem lies in the fact, that DVD+RW discs once formatted are reported by drive as complete and blanking or overwriting just changes the data on disc with no reflection in hardware status. The culprit is cdrom_id in upstream udev package.
I made a patch to cdrom_id to fix the DVD+RW issue. The patch looks for any non-zero values in sectors where ISO or UDF volume descriptors are to be found and if so, sets the status of the disc to blank. If a blank unformatted disc is inserted the original blank status is retained and no reads are issued (fix to the version posted in comment #42 for bug 581925). If read errors occur the complete status is not changed to prevent )possibly) recoverable data from being erased. Any comments are welcome.
You can find source and binaries at https:/
This is just personal unapproved build, so use at your own risk.