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From: Bruce Chambers on 1 May 2010 11:47
dennis wrote:
> On 01-05-2010 03:37, Ken Blake, MVP wrote:
>
>> No, it's a "terabyte." And a terabyte is not 1000GB, it's 1024GB. All
>> the names like this (kilobyte, megabyte, gigabyte, terabyte, petabyte,
>> etc.) are 1024 times larger than their predecessor.
>
> Not when you buy a harddrive. Then it is 1000.


Or, at least, so it seems. The usual marketing ploy used by hard drive
manufacturers to make their products seem a bit larger than they really
are is to assign the value of an even 1,000,000,000,0000 bytes to the
terabyte.

However, WinXP and most other operating systems measure kilobytes,
megabytes, gigabytes, and terabytes as:

1 Kb = 1024 bytes
1 Mb = 1024 Kb = 1,048,576 bytes
1 Gb = 1024 Mb = 1,073,741,824 bytes
1 Tb = 1024 Gb = 1,099,511,627,776 bytes

So, a hard drive sold as having 1 Tb capacity (the even
1,000,000,000,000 bytes) will actually be seen by the operating system
as @ 976.5 Gb, sometimes causing the uninformed purchaser think he/she's
been shorted.


--

Bruce Chambers

Help us help you:
http://www.catb.org/~esr/faqs/smart-questions.html

http://support.microsoft.com/default.aspx/kb/555375

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safety deserve neither liberty nor safety. ~Benjamin Franklin

Many people would rather die than think; in fact, most do. ~Bertrand Russell

The philosopher has never killed any priests, whereas the priest has
killed a great many philosophers.
~ Denis Diderot
From: dennis on 3 May 2010 10:30
On 01-05-2010 17:47, Bruce Chambers wrote:

> However, WinXP and most other operating systems measure kilobytes,
> megabytes, gigabytes, and terabytes as:
>
> 1 Kb = 1024 bytes
> 1 Mb = 1024 Kb = 1,048,576 bytes
> 1 Gb = 1024 Mb = 1,073,741,824 bytes
> 1 Tb = 1024 Gb = 1,099,511,627,776 bytes
>
> So, a hard drive sold as having 1 Tb capacity (the even
> 1,000,000,000,000 bytes) will actually be seen by the operating system
> as @ 976.5 Gb, sometimes causing the uninformed purchaser think he/she's
> been shorted.
>
>

Yes, it is all about definition.

You also have this funny one: 1 KiB = 1024 bytes, 1 MiB = 1024 KiB, etc.

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