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12-25-2002, 08:25 AM
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#1 |
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Member (3 bit)
Join Date: Dec 2002
Posts: 7
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DVD-Disc size?
Why can i only put 4,37GB on a DVD instead of 7,4GB?
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12-25-2002, 09:15 AM
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#2 |
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Member (14 bit)
Join Date: Feb 2000
Location: Offenbach/Main (Germany)
Posts: 8,485
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Hi,
it's because the DVD manufacturers use the same wrong number for advertisement as the hard drive manufacturers do. They calculate with 1000 instead of 1024. The result is: 4,7 GB -> 4700 MB -> 4700000 KB -> 4700000000 Bytes Now, using 1024 you can calculate the real capacity: 4700000000 Bytes = 4589843,75 KB = 4482,269 MB = 4,377216 GB. So 4,377 GB is the real capacity of a recordable DVD. Also look at the MB size: 4482. If you ever burned a data DVD using Nero, you will notice that the capacity mark is a few pixels right of 4480 MB. The same calculation works for hard drive, if you wonder why for example a 120 GB drive shows up with 115 GB in Windows (Windows always displayes the correct size). RJ
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All's right with the world when your PC is working right. 
Last edited by RJ; 12-25-2002 at 09:17 AM. |
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12-29-2002, 01:30 AM
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#3 |
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Mondsreitersmann
Join Date: Jul 1999
Location: Skingrad
Posts: 8,734
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 Now I know why my Barracuda 80 GB is displayed as a 76 GB drive!
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Darum still, füg' ich mich, wie Gott es will. Nun, so will ich wacker streiten, und sollt' ich den Tod erleiden, stirbt ein braver Reitersmann. |
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12-29-2002, 04:49 AM
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#4 |
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Member (14 bit)
Join Date: Feb 2000
Location: Offenbach/Main (Germany)
Posts: 8,485
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And my IBM Deskstar 120GXP "121,5GB" is displayed as 115 GB (that'd be 5 to 6 GB already).
Hopefully they will some day change it, as the difference between correct size and advertised size increases with even bigger hard drives. RJ |
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