CnBeta see two articles in the Beijing surface 30 U disk capacity to "shrink" Kingston's black list "and the Consumers Association, said the U disk shrink accused of common sense: the mistake of statistical methods," talking about the units of measurement .GB, in these two articles are not very accurate, the following is some of my own. .

first cite a passage in Wikipedia

gigabyte (GB of Gigabyte, guitar coffee byte or Beijing bytes or one billion bytes or halberd), often abbreviated as G, is a .information units of measurement, now usually labeled hard drives, memory, and other generally Tai-capacity storage media, storage capacity. .Other storage units conversion

1GB = 1,000 (103) MB

1GB = 1,000,000 (106) KB

1GB = 1,000,000,000 (109) however, .Gigabyte is often to refers Gibibyte, the conversion is:

1GiB = 1,024 (210) MiB of

1GiB = 1,048,576 (220) KiB

1GiB = 1,073,741,824 (230) B Thus, the hard drive, flash drive manufacturers nominal is correct, take a look at Windows the following measurement method 7,501,639,680 should not 6.98 GB 6.98 GiB of a, but rather look at the following measurement methods Linux Linux following .The nominal is correct. .Visible, Windows the following units of measurement error, and written in the textbooks above is based on the Windows platform, so take for granted that 1GB = 1024 * 1024 * 1024 B, while ignoring the real unit of measurement to read:

.Beijing surface 30 U disk capacity "shrink" Kingston Heibang

Consumers Association, said U disk shrink accused of common sense: wrong statistical methods 9.

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