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Windows 7: Missing Hard Drive space?

12 Jul 2011   #1

Windows 7 Home Premium 64-bit SP1
Missing Hard Drive space?

I seems that I'm missing 46GB of space on my hard drive, any idea what is going on, or if one of there programs are notorious for displaying incorrect information?

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Missing Hard Drive space?-lolwut.png  
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Missing Hard Drive space?-lolwut2.png 
My System SpecsSystem Spec
12 Jul 2011   #2

Microsoft Community Contributor Award Recipient

Windows 10, Home Clean Install

Most likely its restore points.
But there can be other causes, just as in Vista.
Hard Disk Space - Free Up and Recover
My System SpecsSystem Spec
12 Jul 2011   #3

Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2

That's the normal size for a 1TB drive. What you're seeing is the difference between binary (240) and decimal counting (1012 ).

HD Manufacturers: 1000 Bits = 1 Byte and 1000 Bytes = 1MB and 1000 MB = 1GB and 1000GB = 1TB
1000 X 1000 X 1000 = 1,000,000,000,000 or 1TB

Windows: 1024MB = 1GB

1,000,000,000,000 / 1024 / 1024 /1024 = 939.3225746154785

(I did that in my head, so it might be off in the last decimal place.) <= Big Fat Lie

The other ~.9 etc is the 100MB System Reserved space at the beginning of the drive.

Terabyte - Wikipedia, the free encyclopedia
My System SpecsSystem Spec

13 Jul 2011   #4

Windows 7 Ultimate SP1 64-Bit

Check out this excellent tutorial from Brink: Hard Disk Space - Free Up and Recover

On today's large hard drives, shadow storage at 10-15% can easily eat up 10-15GB of a 1TB drive.

Add that to the way drive space is calculated as explained by profdlp, it's not hard to see where 46GB went "missing".
My System SpecsSystem Spec
13 Jul 2011   #5

Windows 7 Enterprise X64/Windows 10 Enterprise X64/Windows 10 Pro X64/Linux Mint

profdlp, 931.3225....
My System SpecsSystem Spec
10 Sep 2012   #6

MS Windows 7 Home Premium 64-bit SP1

mine turned a 1000gb into 932gb
My System SpecsSystem Spec

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