[Pkg-libburnia-devel] Bug#680911: libburn: CD tracks are perceived 2 sectors too short

George Danchev danchev at spnet.net
Mon Jul 9 06:41:06 UTC 2012

Source: libburn
Version: 1.2.2-1
Severity: normal
Tags: upstream patch

Info gathered with long conversations with Thomas:

CD tracks are perceived 2 sectors too short. Nice with TAO, bad with SAO.
The returned values of two different MMC track information commands differ
by 2. On Samsung and on LG drives. Must be a feature, but would be correct
only for TAO tracks.

Also, wodim -sao and libburn SAO produce CDs with the same effect. So it
seems not to be a critical bug at burn time. It will confuse brasero users
who manage to talk it into SAO and then want to inspect the CD by xorriso.

xorriso : WARNING : Session 1 bears ISO image size 13456s larger than track size 13454s

xorriso believes that the MMC table-of-content says 13454 blocks.
But I can read 13456 without error. By xorriso, by dd, by mount and diff -r.
The CD is burnt fine, but xorriso does not know it.

This shows up if one burns to blank CD by:

wodim -nopad -sao

or by:

xorriso -padding 0 

or if one forces Brasero into SAO
or (probably) if one burns with Brasero and intermediate disc storage.

Upstream fix: http://libburnia-project.org/changeset/4778

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
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