Resolved HELP: Cannot restore DMG image stored on NTFS disk!

Discussion in 'macOS' started by Thor774, Apr 10, 2012.

  1. Thor774, Apr 10, 2012
    Last edited: May 18, 2012

    Thor774 macrumors regular


    Sep 14, 2007
    Hello. My MacBook Pro has OSX Lion on it.

    I have created a DMG image of my starting volume using Disk Utility. The image was saved on an NTFS formatted external USB disk. I used Paragon NTFS for Mac to activate writing on NTFS partitions. The image was created, tested and it mounted fine. It's size is 105GB.

    I have restarted the system and am accessing Disk Utility from the recovery partition that OSX Lion creates. Disk Utility can see the NTFS disk and I can choose the DMG image as source and the partition on the internal hard disk as a target without problems but when I press the restore button and the Image scan process is going to start I just get an error that says "Unabke to scan Mac-OSX HD. Resource busy". When I try the SCAN BEFORE RESTORE command on Disk Utility on the image I am getting "Unable to scan MAC IMAGE.DMG (Not such file or directory)".

    I have already erased my startup disk and really need to get this image back in place. It is the only backup I have of my data.

    Any help is greatly appreciated!
  2. simsaladimbamba

    Nov 28, 2010
    It is probably due to the DMG being stored on an NTFS drive, even though Mac OS X can read from them.
    What if you just reinstall Mac OS X without restoring and restore from the DMG later?

    And if you get your Mac running, think about using CarbonCopyCloner or SuperDuper! to make a bootable backup to an external HDD (properly formatted*), as using one file (DMG) to store all your files is not a secure backup method, as one file can get corrupt.

  3. Mattie Num Nums macrumors 68030

    Mattie Num Nums

    Mar 5, 2009
    Its most likely an NTFS issue. Not to be a jerk but its never a good idea to put mission critical Mac data on an NTFS share or disk.
  4. Thor774, Apr 22, 2012
    Last edited: May 18, 2012

    Thor774 thread starter macrumors regular


    Sep 14, 2007
    Damn, I never get the notification mails from the forum. Sorry for the delay in answering.

    You were all correct. Moving the dmg file to a Mac formatted hard disk was the answer, but I ended up reinstalling OSX and all my programs anyway and copying just data back from my image as there were some quirks on my actual installation.

    I still think that if the OS states that it supports reading from a file system it should not have any problems at any level. I did not see or find any warning about the impossibility of disk utility to read from an image located on an NTFS formatted disk.

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