Windows 8 and 8.1 Forums


Recreating Microsoft Reserved (system reserved) partition

  1. #1


    Posts : 9
    Windows 8.1 x86

    Recreating Microsoft Reserved (system reserved) partition


    Hi guys,
    I have had a look here https://support.software.dell.com/appassure/kb/137589 for instructions using diskpart to create an MSR partition. A while back I had to move the MSR partition around, which caused it to get corrupted and I was unable to fix it. PC has been working fine until trying to upgrade to windows 10. Now, I get an error which complains about the system reserved partition, which I know is not as it was initially.

    After deleting the volume in diskmgmt, I check the partition layout:
    Code:
    DISKPART> list partition
    
      Partition ###  Type              Size     Offset
      -------------  ----------------  -------  -------
      Partition 1    System              64 MB    20 KB
      Partition 3    Primary             23 GB   193 MB
      Partition 4    Recovery          5400 MB    23 GB
    and then run
    Code:
    DISKPART> create partition msr offset=65
    
    Virtual Disk Service error:
    There is not enough usable space for this operation.
    I need help to recreate this MSR or somehow repair it (alternatively just let it upgrade to windows 10)

    Thanks

      My System SpecsSystem Spec

  2. #2


    Are you sure its MSR and Not EFI ?
    otherwise you'll have to use a partitioning manager software to move your partitions around to get enough room at the beginning of the drive for this partition to have enough useable space?
      My System SpecsSystem Spec

  3. #3


    Posts : 9
    Windows 8.1 x86


    I have 128 MB free, and I want to make a 128 MB partition. The EFI is another partition located before the MSR and is 64MB. Diskmgmt actually lists it as 129 MB when there isn't any partition on it. Is there a way to check why diskpart if failing? Maybe there needs to be more room, I'm not sure.
    Last edited by appros; 29 Jul 2015 at 16:01. Reason: Adding more information
      My System SpecsSystem Spec

  4. #4


    Posts : 2,690
    Windows 3.1 > Windows 10


    == 1. System partition =========================
    create partition efi size=100
    format quick fs=fat32 label="System"
    assign letter="S"

    == 2. Microsoft Reserved (MSR) partition =======
    create partition msr size=16

    == 3. Windows partition ========================
    create partition primary
    shrink minimum=500
    format quick fs=ntfs label="Windows"
    assign letter="W"

    === 4. Recovery partition ======================
    create partition primary
    format quick fs=ntfs label="Recovery"
    assign letter="R"
    set id="de94bba4-06d1-4d40-a16a-bfd50179d6ac"
    gpt attributes=0x8000000000000001
      My System SpecsSystem Spec

  5. #5


    Posts : 9
    Windows 8.1 x86


    I guess I can try making a 16 MB partition. For your reference, this is my current setup:Click image for larger version
    I definitely have an EFI partition, which I believed contained all my booting stuff that wasn't on C:
    I tried to follow this guide: https://www.reddit.com/r/Windows10/c...ved_partition/
    but since there isn't anything on the partition (when an NTFS partition is created) I get File not found - bootmgr when I run the attrib command.
    I will try creating one with a smaller size, although 128 mb is recommended. If you have any ideas on where I should be running those commands in the reddit thread, you thoughts are welcome.
    EDIT:
    Now I have created one with a smaller size. Problem persists.
    Also found this We couldn't update the system reserved partition. Something - Microsoft Community
    Seems that perhaps the EFI partition is the problem?
    I have tried to mount the EFI partition with diskmgr, though the options to are greyed out. With diskpart I was able to get into the EFI partition inside of cmd, though I'm not 100% confident on deleting stuff out of there and adding owernership didn't seem to work as per the reddit guide. Wondering if extending the EFI partition over the now 127mb MSR partition would allow it to upgrade?
    On a slightly separate note, I am unable to to a clean install of windows 8.1. I have tried to get a tool to get the product key, though this complains that I have the wrong edition of windows when I try to install again using a USB created with the media creation tool.
    Last edited by appros; 30 Jul 2015 at 06:47.
      My System SpecsSystem Spec

  6. #6


    Posts : 1
    Windows 10

    Solved?


    Hi,

    I had the same problem when treating to create a 128 MB msr partition using DISKPART. Now I solved it! The trick are the units diskpart uses: size in MB, but offset in KB. So, in your case the diskpart commant should be:
    > create partition msr offset=66560
    Es decir 65*1024 KB, en lugar de 65 MB.

    I've found it on this reference: https://technet.microsoft.com/en-us/.../cc770438.aspx

    Hope this solve your problem!!
      My System SpecsSystem Spec

  7. #7


    Posts : 2
    w764pro


    Quote Originally Posted by KYHI View Post
    == 1. System partition =========================
    create partition efi size=100
    format quick fs=fat32 label="System"
    assign letter="S"

    == 2. Microsoft Reserved (MSR) partition =======
    create partition msr size=16

    == 3. Windows partition ========================
    create partition primary
    shrink minimum=500
    format quick fs=ntfs label="Windows"
    assign letter="W"

    === 4. Recovery partition ======================
    create partition primary
    format quick fs=ntfs label="Recovery"
    assign letter="R"
    set id="de94bba4-06d1-4d40-a16a-bfd50179d6ac"
    gpt attributes=0x8000000000000001

    This did it for me, the missing link I had not seen anywhere else:

    create partition efi size=100
    format quick fs=fat32 label="System"
    assign letter="S"
    create partition msr size=16

    The info on setting recovery partition too, but I have not looked at that yet, I'm happy to be booted with EFI!


    I have my old and new win7 connected. I can boot to either and see the same info in EasyBCD... where does it show which store it is displaying?
      My System SpecsSystem Spec

  8. #8


    Posts : 2
    w764pro


    EasyBCD displays the current store location in the top, but when it's the system BCD, it doesn't say where it is up there. When you load a different BCD it does display like D:\BOOT\BCD.
      My System SpecsSystem Spec

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