Re: Writing Dual Layer DVD-RW using Linux
"Thomas Schmitt" <scdbackup@gmx.net> wrote:
> DVD-RW are sold unformatted and can be used in that
> state. Unformatted DVD-RW need to be blanked before re-usal:
> dvd+rw-format -blank=full /dev/hdc
This is nonsense!
Unformatted DVD-RW media may be used without special preparations.
Formatting puts them into the one of two possible packet writing modes.
This specific mode: random accessible packet writing is typically
les reliable.
> Formatting allows random write access with a restriction
> to alignment of addresses and data amounts (multiples of 2K
> with DVD-RAM, DVD+RW, multiples of 32K with DVD-RW).
Not complete: as the sector size is 32k, writing less than 32k
or writing unaligned data will cause multiple read/write cycles
to actually write the data.
> > I would need to go to HD-DVD or Blu-Ray...
>
> growisofs promises to do BD-RE.
cdrecord does too!
> Hey, if you got such a drive - would you be tester
> for my program cdrskin ?
> It still waits for a wealthy user with such hardware
> (or a spindle full of DVD DL).
Cdrecord writes DVD-R/DL and it schould also write DVD-RW/DL.
If you like to blank DVD-RW/Dl, you need to apply the following patch:
------- drv_dvd.c -------
--- /tmp/sccs.KWaGdC Mo Sep 17 13:26:21 2007
+++ drv_dvd.c Mo Sep 17 13:26:13 2007
@@ -1231,7 +1231,8 @@
*/
profile = get_curprofile(scgp);
if (profile > 0)
- dvdwr = (profile == 0x13) || (profile == 0x14);
+ dvdwr = (profile == 0x13) || (profile == 0x14) || \
+ (profile == 0x17);
if (!dvdwr)
return (blank_dummy(scgp, dp, addr, blanktype));
Jörg
--
EMail:joerg@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
js@cs.tu-berlin.de (uni)
schilling@fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily
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