Drive Size in GB Approximate Total Bytes Decimal Capacity
(bytes/1,000,000,000)
Approximate Binary Capacity (bytes/1,073,724,841)
10 GB 10,000,000,000 10 GB 9.31 GB
20 GB 20,000,000,000 20 GB 18.63 GB
30 GB 30,000,000,000 30 GB 27.94 GB
36 GB 36,000,000,000 36 GB 33.53 GB
40 GB 40,000,000,000 40 GB 37.25 GB
60 GB 60,000,000,000 60 GB 55.88 GB
74 GB 74,000,000,000 74 GB 68.91 GB
80 GB 80,000,000,000 80 GB 74.51 GB
100 GB 100,000,000,000 100 GB 93.13 GB
120 GB 120,000,000,000 120 GB 111.76 GB
160 GB 160,000,000,000 160 GB 149.01 GB
180 GB 180,000,000,000 180 GB 167.64 GB
200 GB 200,000,000,000 200 GB 186.26 GB
250 GB 250,000,000,000 250 GB 232.83 GB
300 GB 300,000,000,000 300 GB 279.40 GB
320 GB 320,000,000,000 320 GB 298.02 GB

Po naski,gigabajt je 1,073,724,841 bajtova,a proizvodjaci
hard diskova gigabajt racunaju kao 1,000,000,000 bajtova.
Tvoj hard disk ima 320,000,000,000 bajtova sto je otprilike
298GB.

Gigabajt po SI-ju i IEC-u, a ne samo po "proizvodjacima diskova" jeste 1 000 000 000 bajtova, a Kilobajt 1000 - tako da tvoj disk zaista ima 320 GB

http://en.wikipedia.org/wiki/Gigabyte

Windows koristi notaciju koja nije SI kompatibilna, i koliko me pamcenje sluzi dolazi od IBM-a i njihovih geekova koji su preuzeli "Kilo" prefiks za 2^10.

...
nije pojeo Win...
nego merni sistem....