Increase partition size by booting from Install Disk?

Discussion in 'Windows, Linux & Others on the Mac' started by shanshor, Jun 21, 2010.

  1. shanshor macrumors regular

    Jan 4, 2008
    I noticed that in disk utility in the install disk, you can drag to change a partition size. Does this erase data?
  2. JediMeister macrumors 68040

    Oct 9, 2008
    Live partitioning was an OS X feature added back in Tiger I think. It has a low degree of risk as long as both partitions are using the Mac OS Extended format, aka HFS+. If you're looking to resize your BootCamp partition after you have already set up Windows, you will need to delete and recreate the partition. This does not mean you have to reinstall Windows and the drivers again, Winclone allows you to backup your Windows partition to an image and then write the image back to the larger partition once you've recreated it using Boot Camp Assistant.
  3. balamw Moderator


    Staff Member

    Aug 16, 2005
    New England
    This live, non-destructive, resizing of HFS+ (Mac) partitions is what Boot Camp Assistant relies on to do its thing.

    If you are looking at resizing an NTFS Boot Camp partition, read the guide as there are many ways to do that including the Winclone method JediMeister referred to.

    Note that you should always have a good verified back up when performing this kind of operation, even if it is in principle non-destructive.


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