Windows 8 and 8.1 Forums


A Partitioning Mess

  1. #1


    Posts : 24
    Windows 8

    A Partitioning Mess


    For some unknown reason I decided to mess with my partitioning arrangement in preparation of the upcoming Windows 10 release. Using my backups my goal was to have Windows 7 on the first 500gb partition and Windows 8.1 on the second 430gb partition. Once Windows 7 upgraded to Windows 10 I intended to move my Windows 8.1 to another machine (using Acronis universal restore) and then extend Windows 10 into its drive space. I have accomplished this, the partitions are arranged on the disk like I want, and both operating systems boot fine.

    My problem is this-I have no "system reserved Partition".

    Booting from Windows 7 (the first partition) disk management shows this way:
    Dell-Windows 7 (C:) Simple Basic NTFS Healthy (System, Boot, Page File, Active, Crash Dump Primary Partition) 500 gb
    Dell-Windows 8.1 (D:) Simple, Basic,Ntfs, Healthy (Primary Partition) 430 gb
    I left 1 gb unallocated space at the end of the drive

    Is there any way I can establish a "system reserved" partition in the unallocated space , move my boot files to it, and make it the active partition? My mind reels at the thought of having to re-install both operating systems from scratch.

    Another question - If I leave it as is and then upgrade to Windows 10 will Windows 10 even boot?

    I'd really like to get this as it should be before I do the Windows 10 upgrade. I appreciate any help.
    edit-I have no idea how I got the smiley faces in this post.
    Last edited by derekimo; 06 Jul 2015 at 21:05. Reason: Fixed smilies in text

      My System SpecsSystem Spec

  2. #2


    Posts : 5,360
    7/8/ubuntu/Linux Deepin


    It is fine as it is.
      My System SpecsSystem Spec

  3. #3


    Posts : 24
    Windows 8

    But what about the 450mb partition?? One more question.


    Thank you for taking the time to respond. I've read a lot on the web and understand that since my boot files reside on the Win7 partition I'm good in relation to being able to boot okand I suppose that once I upgrade that Win10 will retain being the active partition. I've read where a lot of people do away with the system reserved partition altogether (although I can't understand why they would want to). But I'm also missing the 450 mb partition that from what I understand hold the files necessary to recover Windows 8 should the need arise. I understand that once I upgrade Win7 to Win10 that the upgrade will make its own 450 mb hidden partition that will hold Win10 recovery files. Will this same partition hold all the files necessary to recover either Win8 or Win10 (if I were to decide to keep the dual boot arrangement of both 8 and 10). I'm wanting to understand exactly how this works because right now it is all a great big grey area for me.
      My System SpecsSystem Spec

  4. #4


    Quote Originally Posted by glasskuter View Post
    edit-I have no idea how I got the smiley faces in this post.
    Just an FYI,

    If you want to disable smilies you need to use the advanced editor,

    Click image for larger version

    Then tick the box to disable smilies,

    Click image for larger version
      My System SpecsSystem Spec

  5. #5


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    It would be easier if you post a screen shot of your Disk Management then I can suggest what to do.
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  6. #6


    Posts : 24
    Windows 8


    Here you go!
    Click image for larger version
      My System SpecsSystem Spec

  7. #7


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    OK. When playing with partitions, I would strongly advise to make a backup image first using Macrium Reflect Free, just in case something goes wrong.

    Under normal Windows 7 installation, without first formatting the drive, left it unallocated then Windows will create an extra 100MB reserved partition and put the bootmgr, BCD there and C drive will contains the Recovery software (WinRe.wim). Since you pre-formatted the drive, Windows put everything in C Drive. The same will be true for Windows 8 installation.

    On a fresh install of Windows 10 build 10162, it will create a 500MB reserved partition and put everything there (bootmgr (385K), BCD(40K), Recovery (300MB)) so if you upgrade from Windows 7, Windows 10 will not have enough room for those files hence it will create an extra reserved partition (450MB). So if you allocated enough space (500MB) for reserved partition the the upgrade might not create the extra recovery partition, keeping everything neat and clean.
    Here's my suggestion:
    1. Download: Bootable Partition Manger | MiniTool Partition Wizard Bootable Edition and use: Rufus - Create bootable USB to create a bootable USB stick then boot your PC with it.
    2. After step 1, on the first screen, right click on C: Drive->Move/Resize then hold to move it to the right about 500MB
    3. Do the same for D: Drive, click "OK" then click on "Apply" on the top let corner to commit the change.
    4. After step 2, 3. You should have a 500 MB unallocated space at the beginning of disk 0.
    5. Disconnect the USB, and reboot back to Windows. Initialize the 500MB unallocated space and create a simple volume and assign it to letter Z:
    6. Download: EasyBCD - NeoSmart Technologies and install it. (It's free for home use) then run it. Follow the screen below to move the boot manager to Z:
      Click image for larger version
    7. At this point, you should end up with: 500 MB reserved partition, Drive D, Drive C and an extra 500 MB unallocated space at the end.


    FYI, why did you create an extended partition for disk 1 ? Normally, MBR disk type will only allow max. of 4 primary partitions created on a disk. When you exceed 4 partitions then you would create an extended partition. Otherwise, just create a primary partition for disk 1.
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  8. #8


    Posts : 2,690
    Windows 3.1 > Windows 10


    Nice little tutorial Topgun,

    So far (anyway) windows 10 has created the 450MB winre partition only on my GPT system.. Dual Boot 8.1 and 10

    On the MBR system the winre is on the same partition as the OS.. Quad boot vista, 7, 8.1 and 10 (4 partitions)
      My System SpecsSystem Spec

  9. #9


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    @KYHI
    Thanks.
    So far (anyway) windows 10 has created the 450MB winre partition only on my GPT system.. Dual Boot 8.1 and 10
    Depend on what build of Win10 you are installing. With build 10130, The GPT system is shown below:
    Click image for larger version
    Therefore, if you update from build 10130 (Reserved = 300MB) to 10147/10162, Windows will create an extra reserved partition of 450MB after C drive, move Winre to this partition and modify reagent.xml to point to this partition.

    From build 10147 ->10162, they increase the size to 450MB as shown:
    Click image for larger version
    So if you update from 10147->10162, No extra partition will be created after C drive.
      My System SpecsSystem Spec

  10. #10


    Posts : 2,690
    Windows 3.1 > Windows 10


    i was meaning that his win7 and win8 disk is MBR - thus no winre partition - winre on same partition as OS
      My System SpecsSystem Spec

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