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−-*- outline -*-
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−* What best DVD-R or DVD+R?
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−The DVD-R format was developed by Pioneer in 1997 vc DVD+R in 2002 by Sony.
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−DVD+R format was not an official DVD format until January 25, 2008.
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−DVD-R(W) and DVD+R(W) format are incompatible.
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−DVD-R(W) use amplitude modulation, DVD+R(W) use phase modulation, so more reliable.
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−On multi-session DVD-R(W) disk any session take up to 96 MB in time on DVD+R(W)
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−every session take exactly 2 MB.
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−DVD+R(W) win!
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−See
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−  http://en.wikipedia.org/wiki/DVD-R
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−  http://en.wikipedia.org/wiki/DVD%2BR
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−* What capacity of DVD?
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−+----------+-------------------------------------------+
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−|          |                Capacity                   |
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−+  Type    +-----------+---------------+------+--------+
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−|          | sectors   | bytes         | GB   |  GiB   |
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−|          | 2,048B    |               |      |        |
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−+----------+-----------+---------------+------+--------+
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−|DVD-R (SL)| 2,298,496 | 4,707,319,808 | 4.7  |  4.384 |
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−|DVD+R (SL)| 2,295,104 | 4,700,372,992 | 4.7  |  4.378 |
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−|DVD-R DL  | 4,171,712 | 8,543,666,176 | 8.5  |  7.957 |
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−|DVD+R DL  | 4,173,824 | 8,547,991,552 | 8.5  |  7.961 |
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−+----------+-----------+---------------+------+--------+
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