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Partition, rest of hd invisible?


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#1
smw092

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Hey, just put in a new 500gb hd, when installing windows i made a 70gb partition and installed windows there. now once i am into the os, the rest of the hd does not show up? BIOS recognizes it as a 500gb hd but at the moment i only have the 70gb partition which i can see... any ideas?
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#2
smw092

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Never mind got it. Problem 2. 500gb hard drive, but vista only recognizes 465.76 gb of it... how can i use the rest?
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#3
Neil Jones

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Never mind got it. Problem 2. 500gb hard drive, but vista only recognizes 465.76 gb of it... how can i use the rest?


You don't.
A 500Gb hard drive will come up at or around the 466Gb mark.

The size of the drive is its raw unformatted state and calculated as being at or around 500,000,000,000 bytes for a 500Gb hard drive.
In computing the figures are typically in multiples of 1024, not 1000. You get 465Gb as follows:

500,000,000,000 bytes = 488,281,250 Kilobytes = 476,837 Megabytes = 465.66 Gigabytes.

Or in other words:

There are 1024 bytes in a Kilobyte, 1024 Kilobytes in a Megabyte and 1024 Megabytes in a Gigabyte.

500,000,000,000 bytes divided by 1024 = 488,281,250 Kilobytes.
488,281,250 kilobytes divided by 1024 = 476,837 Megabytes (rounded result).
476, 837 megabytes divided by 1024 = 465.66 Gigabytes. (rounded result, calculation done using unrounded results)

Therefore you haven't lost any disk space at all and there is nothing else to use.

Edited by Neil Jones, 24 June 2008 - 03:51 PM.

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#4
smw092

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Oh ok, thanks. Why then do they not advertise drives using their usable space? Just curious.
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#5
Neil Jones

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Because a 500Gb sounds a lot better than a 465Gb, plus it may come up as different sizes depending on the file system in use and how you format the thing and also on the operating system used if any. There's too many variables involved to accurately state what size it'll come up as because the manufacturers have no way of knowing where the drive will be used, I mean you find hard drives in many devices today, not just a computer.
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