-*- outline -*-

* What best DVD-R or DVD+R?

The DVD-R format was developed by Pioneer in 1997 vc DVD+R in 2002 by Sony.

DVD+R format was not an official DVD format until January 25, 2008.

DVD-R(W) and DVD+R(W) format are incompatible.

DVD-R(W) use amplitude modulation, DVD+R(W) use phase modulation, so more reliable.

On multi-session DVD-R(W) disk any session take up to 96 MB in time on DVD+R(W)

every session take exactly 2 MB.

DVD+R(W) win!

See

  http://en.wikipedia.org/wiki/DVD-R

  http://en.wikipedia.org/wiki/DVD%2BR

* What capacity of DVD?

+----------+-------------------------------------------+

|          |                Capacity                   |

+  Type    +-----------+---------------+------+--------+

|          | sectors   | bytes         | GB   |  GiB   |

|          | 2,048B    |               |      |        |

+----------+-----------+---------------+------+--------+

|DVD-R (SL)| 2,298,496 | 4,707,319,808 | 4.7  |  4.384 |

|DVD+R (SL)| 2,295,104 | 4,700,372,992 | 4.7  |  4.378 |

|DVD-R DL  | 4,171,712 | 8,543,666,176 | 8.5  |  7.957 |

|DVD+R DL  | 4,173,824 | 8,547,991,552 | 8.5  |  7.961 |

+----------+-----------+---------------+------+--------+

* Burning tools.

** cdrtools.

In 2006 build system of cdrtools changed and have CDDL, which incomputable

with GPL.

See

  http://cdrecord.berlios.de/private/cdrecord.html

  http://en.wikipedia.org/wiki/Cdrecord

** cdrkit.

Fully GPL alternative for cdrtools.

See

  http://www.cdrkit.org/

  http://en.wikipedia.org/wiki/Cdrkit

*** Make iso image.

  $ genisoimage -A "<info>" -gui -J -R -o <img-file> <dir1> <dir2> ...

<info> is up to 128 bytes. -J adds Joliet directory records wich useful on

Windows. -R adds the Rock Ridge protocol.

To test your image mount it (on Linux):

  $ sudo mount -t iso9660 -o loop,ro <img-file> <mnt-point>

*** Burn iso image.

** cdrskin.

See

  http://scdbackup.sourceforge.net/cdrskin_eng.html

  http://en.wikipedia.org/wiki/Cdrskin