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Incorrect files sizes? (Read 112 times)

Aug 27^th, 2004 at 9:22am

Wing Nut Offline
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Ok, this is kind of odd. I am putting my home movies on dvd, and after a particularly long one, I checked the file size and found this:

The tag under the file says it is 28 Gb, while under properties it says it is only about 27. What is with the deal here? I still have plenty of room, but 1 gig is quite a bit to be off... Tongue

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Reply #1 - Aug 27^th, 2004 at 10:58am

Gixer Offline
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Dunno why? Maybe the same reason that you buy a 40gig HDD but it comes up as only being 38gig!

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Reply #2 - Aug 27^th, 2004 at 10:58am

Skittles Offline
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By doing a little math and checking scale...

28,124,585 KB does approx equal 26.8 GB

1MB = 2^20 = 1,048,576,000 bytes
1GB = 2^30 = 1,073,741,824,000 bytes

1GB * 26.8 = 28,776,280,883.2 bytes

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They both will work perfectly, until you open windows.

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Reply #3 - Aug 27^th, 2004 at 11:00am

Skittles Offline
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Quote:

Dunno why? Maybe the same reason that you buy a 40gig HDD but it comes up as only being 38gig!

That's due to the File Allocation Table that is written when formatted.

What do computers and air conditioners have in common?
They both will work perfectly, until you open windows.

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Reply #4 - Aug 27^th, 2004 at 11:27am

Iroquois Offline
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That's a big movie. Is it an AVI movie? I'm doing the same and I noticed one five minute video was 1gb. Use Windows Movie Maker or Nero Burning Rom (if you have it) to capture. That way you can store it as a WMV or MPEG-2 file which are much smaller but have equal quality. Windows MM is the best for capture.

Quote:

That's due to the File Allocation Table that is written when formatted.

Also it doesn't show the OS partition. My main disk is 40gb but only registers as 31gb due to the OS partition and NTFS table taking up that space.

I only pretend to know what I'm talking about. Heck, that's what lawyers, car mechanics, and IT professionals do everyday. Wink

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Reply #5 - Aug 27^th, 2004 at 1:08pm

Skittles Offline
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Quote:

Also it doesn't show the OS partition. My main disk is 40gb but only registers as 31gb due to the OS partition and NTFS table taking up that space.

Well, if you partition your drive you are effecftively making it two drives so yeah, the sizes will be different.

If you're meaning the partition on which the OS is on, then it's just the table taking up space. I don't know the ratios of how much space the FAT, FAT 32 and NTFS take.

What do computers and air conditioners have in common?
They both will work perfectly, until you open windows.

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