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Cannot shrink Windows 7 Partition

    Question

  • Currently, I only have windows 7 installed on my computer. I would now like to dual boot it with ubuntu, but am unable to shrink the partition even though I have 60 GB free. I have tried using ubuntu's partitioner, windows disk manager, and gpart. When I tried shrinking it in disk manager, it said it was able to do it, but only 800 MB. So my question is, what is causing this, and is there anything I can do to fix this short of reimanging? Thanks
    Friday, April 24, 2009 12:01 AM

Answers

  • You have to do a disk defragment before trying to change the size as some files may exist at the end of the partition that is causing problems. Another way would be to either uninstall some applications that maybe causing the problem.

    You could also try booting up from a CD and deleting the pagefile.sys file as it maybe taking up that area at the part of the partition where the resize occurs.

    Using Disk manager would be the correct way to resize it.  Otherwise you can backup all your settings and files and reformat again with a reinstall of win7 and the other Operation System.
    • Edited by pacav69 Friday, April 24, 2009 4:21 AM after thought
    • Marked as answer by peterno3 Sunday, April 26, 2009 5:33 PM
    Friday, April 24, 2009 4:17 AM

All replies

  • You can try to run a defragmenter, to clean up the free space.
    Friday, April 24, 2009 4:00 AM
  • You have to do a disk defragment before trying to change the size as some files may exist at the end of the partition that is causing problems. Another way would be to either uninstall some applications that maybe causing the problem.

    You could also try booting up from a CD and deleting the pagefile.sys file as it maybe taking up that area at the part of the partition where the resize occurs.

    Using Disk manager would be the correct way to resize it.  Otherwise you can backup all your settings and files and reformat again with a reinstall of win7 and the other Operation System.
    • Edited by pacav69 Friday, April 24, 2009 4:21 AM after thought
    • Marked as answer by peterno3 Sunday, April 26, 2009 5:33 PM
    Friday, April 24, 2009 4:17 AM
  • The problem was indeed that it needed to be fragmented. The built in one isn't good enough, I had to use the free trial of PerfectDisk. There was one system file right at the very end that the built in derangementer didn't see
    Sunday, April 26, 2009 5:35 PM

  • See also:

    How NTFS reserves space for its Master File Table (MFT)

    Files Excluded by the Disk Defragmenter Tool     Note!  NTFS Master File table Mirror (MFTMirr): Usually located in the middle of a volume

    RAPID PUBLISHING





    peterno3, please cut-n-paste these links into your post.  at least, the reference to MFTMirr.  Thx.

    Sunday, April 26, 2009 6:14 PM
  • I just tried PerfectDisk and it was AWESOME!!! That was a huge help. I tried a free defragger and it put temp files at the end of the partition. I could get it to remove them. I was about to reformat the drive and start over on this brand new PC. The PerfectDisk has an option to consolidate free space while defragging and it moved everything nice and tight together starting from the beginning of the partition. It fixed this whole issue. Awesome product.
    Saturday, June 19, 2010 10:49 PM
  • first, you need to run a defragmenter, to clean up the free space, second, what is your flag of your partition? primary or logical. You should notice that in disk management you could only use the unallocated space which is get from primary partition to enlarge your system drive, because it is priamry. If you want to use logical partition to enlarge your system partition that can not be acheive in disk management.

    You can try to use this free partition tool-Partition Assistant , which is more powerful than disk management

    Monday, March 14, 2011 6:13 AM
  • A link to download the latest free trial of PerfectDisk Professional here (as the link is not immediately obvious on their website and asks you for email address):

    http://ftp.raxco.com/pub/download/pd12.5/pd12.5_pro.exe

    Sunday, December 11, 2011 2:27 PM