Windows 10: Strange storage arithmetic by Microsoft Solved

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  1. Posts : 91
    Windows 7-pro-sp1 and windows 10-pro-1803
       03 Jul 2017 #1

    Strange storage arithmetic by Microsoft


    Setting>Storage shows that ThisPC is C:
    That's not correct, since This Pc contains two Windows, Linux Mint and a data partition.
    I don't expect windows to see Linux partitions.
    But no matter how I look at it, I cannot make any sense out of the display in Settings
    Attached Thumbnails Attached Thumbnails StrangeStorage.jpg   TrueStorage.jpg  
      My ComputerSystem Spec

  2. bro67's Avatar
    Posts : 4,887
    Mac OS High Sierra 10.13.5
       03 Jul 2017 #2

    This is an old argument. It has been stated over and over, that the space calculated by Windows is correct. You have to go into Drive Management to see the actual size of the partition, not from explorer.

    As for looking at the Ext4 partition, you can download third party utilities or use Gparted in Linux to see them.
      My ComputerSystem Spec


  3. Posts : 91
    Windows 7-pro-sp1 and windows 10-pro-1803
    Thread Starter
       04 Jul 2017 #3

    "old" - oh, yes, I failed to search first. Sorry.
    Windows explorer numbers match diskmgmt.msc numbers.
    Storage view listed as ThisPC (C: ) under Settings makes no sense to me.
      My ComputerSystem Spec

  4. Berton's Avatar
    Posts : 5,274
    Win10 Home and Pro, Win10 Insider Preview, WinXP Home Premium, Linux Mint
       04 Jul 2017 #4

    91fw said: View Post
    "old" - oh, yes, I failed to search first. Sorry.
    Windows explorer numbers match diskmgmt.msc numbers.
    Storage view listed as ThisPC (C: ) under Settings makes no sense to me.
    Your Storage isn't much different from mine, on my only internal 1TB HDD C: is my Windows/boot/system partition and D: partition is for additional Data and programs. And then I have an ODD and 3 USB HDDs. Are your C:, E: and M: partitions on a drive or separate drives?
    Click image for larger version. 

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      My ComputerSystem Spec


  5. Posts : 91
    Windows 7-pro-sp1 and windows 10-pro-1803
    Thread Starter
       04 Jul 2017 #5

    Yes, it is all on one drive. DiskMgmt display(3 partitions to the right of M: belong to Linux.):
    Attached Thumbnails Attached Thumbnails Partitions.png  
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  6. Berton's Avatar
    Posts : 5,274
    Win10 Home and Pro, Win10 Insider Preview, WinXP Home Premium, Linux Mint
       04 Jul 2017 #6

    Your 3 lettered partitions plus the 4 unlettered partitions plus the unallocated space total about 465.77GB suggesting the drive is marked by the manufacturer as 500GB. There is some 'loss' of capacity as drives get partitioned and formatted, quite normal. The Storage view doesn't take into account unlettered partitions or unallocated space, probably won't even see any sections using unsupported formats.
    Unallocated = unpartitioned, unformatted
      My ComputerSystem Spec


  7. Posts : 91
    Windows 7-pro-sp1 and windows 10-pro-1803
    Thread Starter
       04 Jul 2017 #7

    I have no problem with 465GB. Yes, it is a 500GB drive.
    Screen shots in my first post show Storage reports 87GB used out of 139GB. How is that possible on 78GB windows 10 partition? I did google today and found nothing similar.
    Berton, can you post what explorer shows like I did in the second screenie in the first post. Just to compare notes.
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  8. Berton's Avatar
    Posts : 5,274
    Win10 Home and Pro, Win10 Insider Preview, WinXP Home Premium, Linux Mint
       04 Jul 2017 #8

    Sure, in about an hour when I'm back on my Win10 computer [using my MacBook Pro running macOS Sierra now].
      My ComputerSystem Spec

  9. bro67's Avatar
    Posts : 4,887
    Mac OS High Sierra 10.13.5
       04 Jul 2017 #9

    As the calculator proves, this is the exact amount for 500gb: 465.6613 USB Hard Disk Real Capacity Calculator -- EndMemo A lot of that has to do with reserved space for any bad blocks or sectors. Also it holds a copy of the MBR and other partition info in a reserved space, as it moves data when sectors start to go bad, it will move that data into reserved areas as it tries to rearrange data to make sure that blocks of common files like the Pagefile, stay in one large area.

    You can use one of the Tree Viewers to show you how data is laid out and to see what is eating up space. If you have Hibernate enabled, turn it off in Command with Powercfg /hibernate off The page file if too large, can also eat up precious space, same as downloaded files that Windows holds in a reserved folder and temp files.

    Always clear out old installs, temp files, etc, before getting a real count of drive space available.
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  10. Berton's Avatar
    Posts : 5,274
    Win10 Home and Pro, Win10 Insider Preview, WinXP Home Premium, Linux Mint
       04 Jul 2017 #10

    As promised, same screenshots as you have:
    Click image for larger version. 

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    Click image for larger version. 

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      My ComputerSystem Spec


 
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