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Take a nibble at a bite
OK – we all know that data is made up from bits of information – 8 bits to a byte (4 to a nibble, for those who care). Kilobytes, Megabytes, Gigabytes, Terabytes and Petabytes all used to be based on the ‘power of 2’ system, so 1kB was 1,024 bytes (2 to the power 10), but has now come in line with standard metric notation, and is now 1,000 bytes.
This immediately has an impact on storage for anyone who was brought up on the power of 2 notation. As 1MB would be 1024 bytes squared (1,048,576 bytes), 1GV 1024 cubed, and 1TB1024 to the power 4, we start to see how the quoted storage of a disk is less than many of us expect. It may only lead to a 1% error at the kilobyte level, but it’s getting close to a 10% at the terabyte level; that is capacity that many think they are getting that they are not. To this end, the IEC has renamed old-style units as kibibytes (KiB), mebibytes (MiB) and gigibytes (GiB) (I kid thee not).
read on in the attached