Capacity
Designation | Sides | Layers (total) |
Diameter (cm) |
Capacity | ||
---|---|---|---|---|---|---|
(GB) | (GiB) | |||||
DVD-1 | SS SL | 1 | 1 | 8 | 1.46 | 1.36 |
DVD-2 | SS DL | 1 | 2 | 8 | 2.66 | 2.47 |
DVD-3 | DS SL | 2 | 2 | 8 | 2.92 | 2.72 |
DVD-4 | DS DL | 2 | 4 | 8 | 5.32 | 4.95 |
DVD-5 | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD-9 | SS DL | 1 | 2 | 12 | 8.54 | 7.95 |
DVD-10 | DS SL | 2 | 2 | 12 | 9.40 | 8.75 |
DVD-14 | DS SL+DL | 2 | 3 | 12 | 13.24 | 12.33 |
DVD-18 | DS DL | 2 | 4 | 12 | 17.08 | 15.90 |
Designation | Sides | Layers (total) |
Diameter (cm) |
Capacity | ||
---|---|---|---|---|---|---|
(GB) | (GiB) | |||||
DVD-R | SS SL (1.0) | 1 | 1 | 12 | 3.95 | 3.68 |
DVD-R | SS SL (2.0) | 1 | 1 | 12 | 4.70 | 4.37 |
DVD-RW | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD+R | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD+RW | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD-R | DS SL | 2 | 2 | 12 | 9.40 | 8.75 |
DVD-RW | DS SL | 2 | 2 | 12 | 9.40 | 8.75 |
DVD+R | DS SL | 2 | 2 | 12 | 9.40 | 8.75 |
DVD+RW | DS SL | 2 | 2 | 12 | 9.40 | 8.75 |
DVD-RAM | SS SL | 1 | 1 | 8 | 1.46 | 1.36* |
DVD-RAM | DS SL | 2 | 2 | 8 | 2.65 | 2.47* |
DVD-RAM | SS SL (1.0) | 1 | 1 | 12 | 2.58 | 2.40 |
DVD-RAM | SS SL (2.0) | 1 | 1 | 12 | 4.70 | 4.37 |
DVD-RAM | DS SL (1.0) | 2 | 2 | 12 | 5.16 | 4.80 |
DVD-RAM | DS SL (2.0) | 2 | 2 | 12 | 9.40 | 8.75* |
The basic types of DVD (12 cm diameter, single-sided or homogeneous double-sided) are referred to by a rough approximation of their capacity in gigabytes. In draft versions of the specification, DVD-5 indeed held five gigabytes, but some parameters were changed later on as explained above, so the capacity decreased. Other formats, those with 8 cm diameter and hybrid variants, acquired similar numeric names with even larger deviation.
The 12 cm type is a standard DVD, and the 8 cm variety is known as a MiniDVD. These are the same sizes as a standard CD and a mini-CD, respectively. The capacity by surface (MiB/cm2) varies from 6.92 MiB/cm2 in the DVD-1 to 18.0 MiB/cm2 in the DVD-18.
As with hard disk drives, in the DVD realm, gigabyte and the symbol GB are usually used in the SI sense (i.e., 109, or 1,000,000,000 bytes). For distinction, gibibyte (with symbol GiB) is used (i.e., 10243 (230), or 1,073,741,824 bytes).
Each DVD sector contains 2,418 bytes of data, 2,048 bytes of which are user data. There is a small difference in storage space between + and - (hyphen) formats:
Type | Sectors | Bytes | kB | MB | GB | KiB | MiB | GiB |
---|---|---|---|---|---|---|---|---|
DVD-R SL | 2,298,496 | 4,707,319,808 | 4,707,319.808 | 4,707.320 | 4.707 | 4,596,992 | 4,489.250 | 4.384 |
DVD+R SL | 2,295,104 | 4,700,372,992 | 4,700,372.992 | 4,700.373 | 4.700 | 4,590,208 | 4,482.625 | 4.378 |
DVD-R DL | 4,171,712 | 8,543,666,176 | 8,543,666.176 | 8,543.666 | 8.544 | 8,343,424 | 8,147.875 | 7.957 |
DVD+R DL | 4,173,824 | 8,547,991,552 | 8,547,991.552 | 8,547.992 | 8.548 | 8,347,648 | 8,152.000 | 7.961 |
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Famous quotes containing the word capacity:
“The first half of it consists of the capacity to enjoy without the chance; the last half consists of the chance without the capacity.”
—Mark Twain [Samuel Langhorne Clemens] (18351910)
“The capacity to give ones attention to a sufferer is a very rare and difficult thing; it is almost a miracle; it is a miracle. Nearly all those who think they have this capacity do not possess it. Warmth of heart, impulsiveness, pity are not enough.”
—Simone Weil (19091943)
“The terrifying message of gay liberation is that men are capable of loving their brothers. It should be sweet news to every woman in the world, for, if the capacity of men to love whom they have been taught to treat as competitors and enemies can transcend their education, the world can begin to heal.”
—Jane Rule (b. 1931)