Properties on drive C shows less space than selecting all files.

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  1. Posts : 66
    Windows 7 Ultimate x64 SP1
       #1

    Properties on drive C shows less space than selecting all files.


    Why is that,I know the reason if it was the other way around but.
    All files are visible(normal and system hidden files)

    Properties on the partition

    Used space: 21,387,874,304 bytes 19.9GB
    Free space: 98,539,807,296 bytes 91.7GB

    Capacity: 119,926,681,600 bytes 111GB
    __________________________________
    Properties on all files selected

    Size on disk: 24.2 GB (26,051,181,595 bytes)

    100,431 Files, 21.724 Folders
    __________________________________
    WizTree shows:
    19.9 GB,99,721 files and 21,777 folders
    __________________________________
    Everything shows:
    77,564 files and 21,766 folders

    It's 128GB Samsung 840 EVO SSD

    There is also a difference when I check my hdd which I used before on my old pc(with winxp)but the difference there is 200mb and here is little above 4gb.

    I have plenty of free space but I'm just curious why do I get different size

    The windows folder alone is 19.8gb
      My Computer


  2. Posts : 4,776
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #2

    WizTree


    Those programs won't show all used space. I'm not sure that anything will.

    See: C: Drive Used/Free Space WAY Different Than Actual?

    Also check out Post #7 in the same thread.
      My Computer


  3. Posts : 2,465
    Windows 7 Ultimate x64
       #3

    One possible cause are the numerous hardlinks and junctions used within Windows by default. Windows Explorer is poor enough to count those twice while other tools may realize that they actually point to the same file and add them up only once.

    For example, by default Windows includes junctions to "users" (named "documents and settings") and many of the dlls in system32 are actually hardlinks to files in winsxs. When requesting properties of files Explorer traverses the directories and count and adds files individually (leading to an excess) while the disk properties access NTFS data structures directly that gets the actual number of data blocks really allocated.

    Another possible cause of discrepances are permissions. You only can count files that have access to list at least. An example is "system volume information" which is not readable even to admins (only to system by default), so just selecting everything will not take those into account, as no program can ever get to know what's in there without permissions. The whole disk properties account for that too.
      My Computer


  4. Posts : 66
    Windows 7 Ultimate x64 SP1
    Thread Starter
       #4

    System Restore(system volume information)is disabled so even if it can't access it to get the size,there is nothing inside. I disable the System Restore because I don't want to save useless things to the ssd.I only need it to be able to manually create restore points but I don't think it's possible to work that way(without auto backing up things and creating restore points)
      My Computer


  5. Posts : 4,776
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #5

    System Volume Information


    If you think that System Volume Information will remain empty because you have disabled System Restore then you are wrong. With System Restore disabled on my machine there are a fair number of folders and files inside.

    Properties on drive C shows less space than selecting all files.-svi.jpg

    I'd stop worrying. You can't just add up space used by files and expect it to equal space used.
      My Computer


  6. Posts : 4,776
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #6

    Another Example


    WizTree won't read C:\$Extend either!

    Properties on drive C shows less space than selecting all files.-ads.jpg
      My Computer


  7. Posts : 66
    Windows 7 Ultimate x64 SP1
    Thread Starter
       #7

    Don't know if this has anything to do with it(UAC is disabled)but I can access anything with WizTree
    System Volume Information
    $Extend
    Attached Thumbnails Attached Thumbnails Properties on drive C shows less space than selecting all files.-2014-11-23_211030.jpg  
      My Computer


  8. Posts : 2,465
    Windows 7 Ultimate x64
       #8

    Maybe you tampered with the default permissions of Windows and ran it as administrator so that it gave access to some extra areas. That can give you access to "system volume information" for example (among other places).

    The issue of hardlinks and junctions still remains.
      My Computer


  9. whs
    Posts : 26,210
    Vista, Windows7, Mint Mate, Zorin, Windows 8
       #9

    You can't go only by the files. You have to figure in the shadowstorage. Run this command:

    vssadmin list shadowstorage

    There you may find the difference (in Allocated)
      My Computer


  10. Posts : 4,776
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #10

    $Extend


    vsub said:
    Don't know if this has anything to do with it(UAC is disabled)but I can access anything with WizTree
    System Volume Information
    $Extend
    Well sure, I can view $Extend in WizTree but it doesn't show all the files - particularly a 0.5 GB $USNJrnl. When you think you've found a tool that will report all used/ slack space accurately please let us know!

    Properties on drive C shows less space than selecting all files.-tree-view.jpg

    Compare the above with the following. It includes the 0.5 GB file that WizTree misses.

    Last edited by Callender; 23 Nov 2014 at 20:27. Reason: add image
      My Computer


 
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