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Windows 7: Over 150GB of data uncounted for

29 Jul 2010   #1
robert112

Windows 7
 
 
Over 150GB of data uncounted for

I have an external terabyte drive that is used to store files on. There are only 375.6GB of actual data on the drive but 533.7GB is showing up as being used. So there is about 150GB of magic fairy dust hiding somewhere on the drive. I have tried defragging, ccleaner, windirstat (treesize), changing the recycle bin size, and checking for weird partitions, but there is nothing out of the ordinary. There are no viruses or anything like that and I just installed Windows 7 32bit. And this has nothing to do with the gigabyte gibibyte conversion. Total space is showing up as 931GB and I expect that, but I mean almost 160GB of that total is uncounted for.

Would having indexing on or the allocation size have anything to do with this?


My System SpecsSystem Spec
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29 Jul 2010   #2
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

I suggest 2 actions:

1. Run WinDirStat. That will tell you exactly whats on your disk (but not the shadowstorage).
2. For the shadowstorage, go to Start > Computer > right click and go to Properties > System protection (in the left pane on top) > System protection tab > highlight the drive in question > configure > and what is the number behind "current usage" in the second half of the window?
My System SpecsSystem Spec
29 Jul 2010   #3
robert112

Windows 7
 
 

WinDirStat tells me there are 375.5 GB of files and the System Protection is turned off with 0 bytes currently used.
My System SpecsSystem Spec
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29 Jul 2010   #4
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Welcome to Seven Forums robert112. You can also try this small, free program:

Tree Size Free

A Guy
My System SpecsSystem Spec
30 Jul 2010   #5
cluberti

Windows 10 Pro x64
 
 

It could actually be MFT taking up that space as well - if the drive wasn't properly aligned and is using the wrong cluster sizes for the types of files you're storing (size-wise), you can waste a TON of space in MFT (which won't show up in a disk usage tree for apps using Win32 APIs to get disk usage info, but would show up as used space nonetheless).
My System SpecsSystem Spec
30 Jul 2010   #6
robert112

Windows 7
 
 

Just did a CHKDSK and my allocation size is 512 where needs to be 4096. I don't know if this is causing an issue but needs to be fixed. I'm about to back up and format the drive right and see how that goes.
My System SpecsSystem Spec
02 Aug 2010   #7
robert112

Windows 7
 
 

Changing the allocation size to 4096 fixed it. Speeds up defragging too.
My System SpecsSystem Spec
02 Aug 2010   #8
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Quote   Quote: Originally Posted by robert112 View Post
Changing the allocation size to 4096 fixed it. Speeds up defragging too.
Good catch, thanks for sharing

A Guy
My System SpecsSystem Spec
Reply

 Over 150GB of data uncounted for




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