Decrease size of Bootcamp partition?

Discussion in 'iMac' started by musiclvr, Jul 25, 2015.

  1. musiclvr macrumors member

    Joined:
    Oct 4, 2011
    #1
    Initially when setting up my bootcamp partition, I allowed 250GB. But now I rarely use bootcamp, and am only using 70GB. Is it possible to reallocate some of that space (about 150GB) back to my main partition? Is it safe/easy to do? Or will I have to reinstall my OS and everything?
     
  2. steve23094 macrumors 68000

    steve23094

    Joined:
    Apr 23, 2013
    #2
    You need something like Paragon Camptune. If you resize from within OS X you will find Windows will throw a wobbly next time you boot it up.
     
  3. musiclvr thread starter macrumors member

    Joined:
    Oct 4, 2011
    #3
    I just tried resizing using Camptune and got the following error:
    [​IMG]

    Any ideas what I am doing wrong?
     
  4. Ishayu macrumors regular

    Ishayu

    Joined:
    Jan 18, 2012
    Location:
    Denmark
    #4
    Within Windows you can shrink the Boot Camp partition using the Partition manager. After that, space should be freed in Mac OS X to expand your Macintosh HD partition.
     
  5. madeirabhoy macrumors 6502a

    Joined:
    Oct 26, 2012
    #5
    honestly, dont. if you need to reduce the size of the partition, back up anything in that partition (probably just steam games), then use bootcamp to delete the partition and then re add it and reinstall windows. any other solution will just bring tears.
     
  6. steve23094 macrumors 68000

    steve23094

    Joined:
    Apr 23, 2013
    #6
    I don't I'm afraid, I have never seen that error message before.

    This thread http://www.mac-forums.com/forums/ru...sizing-os-x-boot-camp-windows-partitions.html suggests your partition might be too fragmented.

    Try Ishayu's suggestion, if that doesn't work then contact Paragon support to see what they say. Whatever you find out post back here so the next person with a similar problem knows what to do.
     
  7. musiclvr thread starter macrumors member

    Joined:
    Oct 4, 2011
    #7
    Can you explain how to do this? I am logged into Windows but don't see any Partition manger.
     
  8. musiclvr thread starter macrumors member

    Joined:
    Oct 4, 2011
    #9
    Thanks for the video. I shrunk my Bootcamp volume but not sure how to reallocate that space back to my primary drive. I tried going to Disk Utility but it says the Bootcamp partition is still 250GB. Do I need to reallocate it while logged into Windows?
     
  9. madeirabhoy macrumors 6502a

    Joined:
    Oct 26, 2012
    #10
    incidentally, just something i read on a forum before, if your windows installation is a hooky copy, DO NOT attempt anything to resize the partition. dont remember the technical details but remember reading about camptune and people saying it destroyed their bootcamp, and the answer from paragon was that it was down to the way hooky copies of windows have modified loaders (prob not the technical term).
     
  10. musiclvr thread starter macrumors member

    Joined:
    Oct 4, 2011
    #11
    What's a hooky copy?

    I shrunk my Bootcamp Volume [C:] and you can see I have 88.38GB of unallocated space next to it. I want to add that unallocated space to [E:] which is where I have OS X installed. But I can't figure out how to extend E because the 'Extend Volume' option is grayed out when right clicking in Windows.

    [​IMG]
     
  11. steve23094 macrumors 68000

    steve23094

    Joined:
    Apr 23, 2013
    #13
    Hooky is slang for dodgy/pirated.

    Try expanding it in OS X Disk Utility.
     
  12. musiclvr thread starter macrumors member

    Joined:
    Oct 4, 2011
    #14
    I did try expanding in OS X using Disk Utility. But it says the Bootcamp partition is still 250GB...it doesn't show the unallocated space.
     
  13. Dirtyharry50 macrumors 68000

    Dirtyharry50

    Joined:
    May 17, 2012
    #15
    I believe you are playing with fire. I would have recommended as someone else did above doing what Apple indicates is necessary, delete the bootcamp partition using Bootcamp Assistant and redo it. They make these recommendations for a reason.

    At this point, to reclaim the space, I would make sure your Mac install is fully backed up with Time Machine and then I would run Bootcamp Assistant to remove the Windows install which should reclaim the full 250 gigs. Then you can start over.

    By the way, I cannot guarantee that even this will work. I expect that it should but failing that you will need to redo the entire disk, OS X and all to get back to where you started from. I hope not but that is the worst case scenario you should be aware of and thus backup accordingly.

    I realize you may not like this idea but I am trying to spare you pain.
     
  14. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #16
    As post #12 says, Winclone will handle this for you. Shrink the Windows filesystem with Winclone, create an image of the Windows installation, delete the Bootcamp partition, and the extra one, expand your OS X partition, then make a new FAT32 partition that Winclone will then use to restore your Windows installation to. (Winclone will convert the partition back to NTFS when it restores.)
     
  15. Dirtyharry50 macrumors 68000

    Dirtyharry50

    Joined:
    May 17, 2012
    #17
    Have you done this personally or are you operating under the assumption that based on what you know about Winclone, it should work? I am just curious. What is he supposed to delete the two partitions with? Does Winclone offer partition management tools? Lastly, and I don't know about this but I presume the system boot loader is provided by OS X when it is installed and manages what is presented on boot when you hold down the option key. What is going to update that if bootcamp assistant isn't used to do the install?

    I realize, I may just be misunderstanding how the boot loader works on a Mac system. I note it is aware of bootable external drives so is it able to recognize a Windows partition and hand off to the Windows boot loader on its own without explicitly being setup to do so? This is something I am guessing that bootcamp assistant handles but I do understand I could be wrong about that. Do you know how this works and are therefore certain what you propose will work absolutely and without fail?
     
  16. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #18
    I use Winclone to resize and deploy Bootcamp installs on a regular basis. I manage about 75 dual boot Macs as a significant part of my job.
    It works exactly as described.
    Once Winclone has made an image of the shrunken Windows filesystem, partition management is done via Disk Utility in OS X. The boot process works the same whether the partition is created via the Boot Camp Assistant or with Disk Utility, then restored from the Winclone image. Winclone does all of what's needed to make Windows boot properly.
    Macworld has a review of Winclone 4 (it's now up to version 5) here: http://www.macworld.com/article/204...-a-must-have-utility-for-boot-camp-users.html
     
  17. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #19
    I have done this exact process several times with Windows 8.1 and WinClone and it worked perfectly each time. That is the only process I would trust to resize Windows ... I would never use any Windows based Utility which may be Mac-unaware and screw up my OS X installation.
     
  18. Dirtyharry50 macrumors 68000

    Dirtyharry50

    Joined:
    May 17, 2012
    #20
    That's good to know. Thank you for taking the time to explain that to me.
     
  19. throAU macrumors 601

    throAU

    Joined:
    Feb 13, 2012
    Location:
    Perth, Western Australia
    #21
    I did it with mavericks just fine. I'd suggest defragmenting your windows partition first though from within windows.
     

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