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DVD Storage capacity
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Why do i never get no where near 4.7Gb on one blank DVD? Its always just over 4Gb rather that nearly 5Gb.
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because the manufacturers are allowed to quote quantities in the decimal system, whereas computers use the binary system.
in decimal, 1GB = 1,000,000,000 bytes
in binary, 1GB = 1,073,741,824 bytes (1024^3)
thus, 4.7GB / 1,073,741,824 bytes = 4.3772161006927490234375GB.
Thus you only actually get 4.377GB to play with.
The same happends with other forms of storage media, such as hard drives.
in decimal, 1GB = 1,000,000,000 bytes
in binary, 1GB = 1,073,741,824 bytes (1024^3)
thus, 4.7GB / 1,073,741,824 bytes = 4.3772161006927490234375GB.
Thus you only actually get 4.377GB to play with.
The same happends with other forms of storage media, such as hard drives.
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