1.    11 Jan 2016 #1
    Join Date : Jan 2016
    Posts : 14
    Windows 10, Windows 7, Linux Mint 17.3

    Storage bug? summary capacity & usage greater than disk/partition size

    re Settings -> System -> Storage

    It seems as though Windows 10 can add some, but not necessarily all new or detected partitions to an aggregate capacity under the label This PC (C: ) Even if the partitions are empty NTFS or RAW (inc. Linux Swap?) also include them as usage: 'System & reserved.' I haven't able to discern a pattern of how Windows 10 determines if a new or empty formatted partition will be added to the aggregate Storage summary. At best it's confusing, and appears to be broken.

    Further: deleting some partitions, or shutting down, unplugging disks and rebooting does not necessarily alter the reported aggregate that is shown for This PC (C: ) i.e. You would expect removing all drives and partitions to restore This PC (C: ) status to show only the Windows partition capacity - it doesn't and it continues to show 100s extra GB that are no longer present on the PC.

    e.g. on my previous install I was seeing an impossible 239GB 'system & reserved' with 323GB 'capacity.'

    My system:
    • Windows 10 & 7 partitions each = 100GB
    • Windows disk total capacity = 223GB
    • Other disks, mix of NTFS, EXT4 (Mint 17, /home) Swap (Linux)

    N.B. I've tried this a couple of ways with fresh installs on clean disks and see the same result. It doesn't make a difference if Windows 10 or Windows 7 is installed first. I have made the partition order: recovery|efi|msr|windows|other

    Other things that make no difference:
    • Removing or assigning new disk letters
    • For both Windows 10 and Windows 7:
      1. Hibernation is disabled (from admin cmd terminal)
      2. Page-file management to be on C: only (other disks set to none)

    At the moment I am unsure if this is merely a 'cosmetic' issue or something that might cause more serious functionality problems later e.g. not being able to install since Windows incorrectly thinks a drive or partitions are used or reserved.

    I'm guessing this is multi-boot related, but does this strange Storage summary behaviour occur on anyone's system with Windows 10 only? Is anyone aware of this issue in dual/multi-boot PCs? is there a known bug or fix?
    Last edited by Berk; 11 Jan 2016 at 16:08.
      My System SpecsSystem Spec

  2.    11 Jan 2016 #2
    Join Date : Jul 2015
    Posts : 2,552
    10 Pro

    Me too. I'm using 50GB of my 32GB partition apparently.....

    Click image for larger version. 

Name:	Capture.PNG 
Views:	1 
Size:	125.3 KB 
ID:	58299

    Actually I think you are right - for me it thinks my 32.6GB partition is 57.4GB as it adds on HFS partitions.

    Number  Start (sector)    End (sector)  Size       Code  Name
       1              40         1024039   500.0 MiB   2700
       2         1024040         1433639   200.0 MiB   EF00  EFI
       3         1435648         1468415   16.0 MiB    0C01  Microsoft reserved ...
       4         1468416        69982207   32.7 GiB    0700  Basic data partition
       5        69982208       186220543   55.4 GiB    0700  Data
       6       186482800       235708599   23.5 GiB    AF00  El Capitan
       7       235708600       236978135   619.9 MiB   AB00  Recovery HD
    I'm pretty sure it is only cosmetic so I'm ignoring it

    EDIT - if I boot from another Windows instance then the same 32.6GB partition is seen as correct size

    Click image for larger version. 

Name:	Storage 2.PNG 
Views:	12 
Size:	20.9 KB 
ID:	58337
    Last edited by lx07; 11 Jan 2016 at 13:10. Reason: Another view...
      My System SpecsSystem Spec


Similar Threads
Thread Forum
Windows 10 keep hanging and using high disk usage, partition order?
So I've tried multiple different installations of windows 10 on my hp envy 17 (no slug of a machine, i5-12gb ram etc) Stretching back to the previews. I'm also running windows 7 on the laptop in a dual boot situation. The disk has a built in HP...
General Support
Recycle Bin Maximum Storage Size - Change in Windows 10
How to Change Maximum Storage Size for Recycle Bin in Windows 10 The Recycle Bin provides a safety net when deleting files or folders. When you delete any of these items from your hard disk, Windows places it in the Recycle Bin and the Recycle...
Solved What would be the highest capacity multimedia storage?
What would be the highest capacity type of CD (I call it CD, but I know there are other types...) If I search on Google for "Highest capacity CD" it comes up with 700MB and I know that in not a lot. So, what I'm asking is, what other types are...
Software and Apps
Recovery Partition is 95GB - Why does it consume 1/5th of SSD capacity
Pretty much exactly what the title says. After upgrading from win7 => win10 I migrated over to an Samsung 840EVO ssd with 500gb capacity and before I knew it, the capacity was almost already full. I scaled back some of my media storage to an...
General Support
Solved Ηow to restore the capacity of a hard disk after image recovery
Let me explain my problem. I have 3 HDD's (2 internals (1 SSD 120 GB and 1 HDD-Sata 200 GB) and 1 external USB HDD (2 TB)). I have installed Windows 10 Pro x64 final οn the SSD 120 GB without problems and i have installed the extra programs that i...
General Support
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 22:40.
Find Us
Twitter Facebook Google+

Windows 10 Forums