[Bug 311297] Re: growisofs unable to burn dual layer DVD-R

[Zhang Weiwu]

A bit of information to save your time googling, but check timestampe of
this comment to decide if you should google again.

a. this problem seems to be the same as #439281. Please QA people take a
look and close one of them in case of dups.

b. this post " Layer break for DVD+R DL with growisofs / dvd+rw-tools"
seems to suggest to me that the problem is related to incorrect layer-
break position, but the article did not offer ways to find out what is
the right value for layer-break point.

 http://stephane.emisfr.info/en/2009/09/11/layer-break-for-dvdr-dl-with-
growisofs-dvdrw-tools/

c. the incompatibility between growisofs and DVD-R DL is reported in
multiple bug trackers, but strangely, not in Debian bug tracker, it is
strange, because, growisofs is now (IMHO) a debian project.
Interestingly the problem seems to be reported in 2007 to Debian cdwrite
mailing list: http://lists.debian.org/cdwrite/2007/03/msg00022.html
without getting any attention.

d. K3B bug report about this issue mentioned this problem might will be
gone when K3B switch to cdrecord. It is not clear to me if K3B is to
swicth from growisofs to cdrecord or from the GPL "wodim" to non-GPL
"cdrecord".

e. the explicite mention of 'growisofs compatibility with DVD-R DL'
seems to hint this issue doesn't exist with wodim/cdrecord. In my test
case, the DVD-R DL which could not start burning due to the very problem
of this issue, can be burnt, but with fixate error, with wodim. The
following snip of wodim output showed the error message. However, the
disco burnt with this very error message can be read successfully.

Track 01: Total bytes read/written: 7991693312/7991693312 (3902194 sectors).
Writing  time: 2896.302s
Average write speed   2.0x.
Min drive buffer fill was 91%
Fixating...
Errno: 5 (Input/output error), flush cache scsi sendcmd: no error
CDB:  35 00 00 00 00 00 00 00 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 72 0B 00 00 00 00 00 0E 09 0C 00 00 00 00 00 00
Sense Key: 0x0 No Additional Sense, Segment 11
Sense Code: 0x00 Qual 0x00 (no additional sense information) Fru 0x0
Sense flags: Blk 0 (not valid) 
cmd finished after 131.203s timeout 120s
Trouble flushing the cache
wodim: Cannot fixate disk.
Fixating time:  131.209s
wodim: fifo had 125878 puts and 125878 gets.
wodim: fifo was 0 times empty and 87500 times full, min fill was 90%.

-- 
growisofs unable to burn dual layer DVD-R
https://bugs.launchpad.net/bugs/311297
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