
A new architecture has been developed to increase the space available on a hard drive by reducing the bits wasted with the formatting architecture, which will debut with certain new Western Digital hard drives.
Once upon a time doing IT support as a part time job, and always for family & friends, I can recall the numerous questions about why their hard drive didn’t have all the GB it was supposed to. Those familiar with computers have known for quite some time that for a hard drive to operate, a certain amount of the physical storage media is used for logically organizing all your data.
As you can gather from the picture above, less space is wasted on logically organizing your data and thus more can be dedicated to actually storing it. Western Digital calls this Advanced Format and it can realize 7-11% more space than a drive that uses “legacy” formatting.
From the sound of things, this is an industry standard and not proprietary to Western Digital, so we should see this across all hard drives eventually. The only catch is that Windows XP does not natively support this, but Western Digital does offer a tool to remedy that.
Source: [Western Digital PDF file] via [Geek.com]


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“Once upon a time doing IT support as a part time job, and always for family & friends, I can recall the numerous questions about why their hard drive didn’t have all the GB it was supposed to.”
I think perhaps those friends, family and you do not understand the prefixes for binary multiples:
http://physics.nist.gov/cuu/Units/binary.html
Factor Name Symbol Origin Derivation
210 kibi Ki kilobinary: (210)1 kilo: (103)1
220 mebi Mi megabinary: (210)2 mega: (103)2
230 gibi Gi gigabinary: (210)3 giga: (103)3
240 tebi Ti terabinary: (210)4 tera: (103)4
250 pebi Pi petabinary: (210)5 peta: (103)5
260 exbi Ei exabinary: (210)6 exa: (103)6
Examples and comparisons with SI prefixes
one kibibit 1 Kibit = 210 bit = 1024 bit
one kilobit 1 kbit = 103 bit = 1000 bit
one mebibyte 1 MiB = 220 B = 1 048 576 B
one megabyte 1 MB = 106 B = 1 000 000 B
one gibibyte 1 GiB = 230 B = 1 073 741 824 B
one gigabyte 1 GB = 109 B = 1 000 000 000 B