Re: More Dual-Layer burning oddities

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

Joerg Schilling wrote:
> DVD+R/DL does not support layer jump recording and thus does
> not support multi-border recording.

In MMC-5 i read the DVD+R DL model description as
an extension of the DVD+R description which in
"4.3.6.2.2 The Hosts Perspective" clearly describes
sessions and fragments. The latter are logical tracks.
No "borders" mentioned, btw.

In "4.3.7 DVD+R Dual Layer" i read:
"The DVD+R Dual Layer (DVD+R DL) medium is DVD+R medium
 with two recording layers [...]"

"4.3.7.5 Recording on DVD+R DL" states:
"A DVD+R DL disc may contain multiple sessions, each
 consisting of one or more fragments."

In "4.3.7.5.1.1 Sessions":
"The session structure is identical to that defined for
 DVD+R [...]"


Multi-session DVD+R does work. No doubt.
And you rarely find clearer promises in MMC than the
ones above for DVD+R DL.

I make daily incremental ISO 9660 backups on multi-session
DVD+R. > 30 sessions per media, each virtually covering
1.4 GB of home directory. Each mountable to see the complete
directory tree snapshot as it was at the day of the backup.

Only my DVD-ROM drive is clueless about the TOC. xorriso
has to help it finding the sbsector= values to mount younger
ISO images. Young programs should help elderly hardware.


Have a nice day :)

Thomas