4 Replies Latest reply: Nov 21, 2010 7:52 PM by baltwo
DigitALL Level 1 Level 1 (0 points)
My MAC was working fine and at that point from Disk Utility, selecting the main disk, I clicked on "New Image" and saved the entire disk as a backup. It resulted in a 135Gb dmg file. Then I save it to a USB hard disk where I have some other files (pictures, movies, etc).

After some time I screwed up the system with some "cleaning" application and had problems at boot up.

I considered that I have no problem since I have the dmg backup. So I booted up from the original SL disk and selected from Utilities menu, "Restore System from backup" but it does not see the USB hard disk where the image is saved. (?!)

Then I went back to menu Utilities/Disk Utility and noticed that my USB drive it does shows up. I clicked on the main disk (with the damaged boot), selected the "Restore" tab, then selected the dmg image from the disk, selected where to restore and and Go... but I get "+Restore Failure, Could not find any scan information. The source image needs to be imagescanned before it can be restored+" ...and now I am stuck! What this message means and how I can get around it to have a successful restore?
Do I have to erase the partition of the original disk before?
Thank you.

MacBook Pro, Mac OS X (10.6)
  • Allan Eckert Level 8 Level 8 (46,490 points)
    It appears that when you attempted to create the disk image, it failed for some reason. I would say right now your chances of recovering anything are nil.



    ___________________

    Allan
    tiger
  • ericmeyers Level 4 Level 4 (1,410 points)
    I don't know the answer, but in the future you might want to consider using Time Machine, as that is it's purpose.
  • Matt Broughton Level 5 Level 5 (4,980 points)
    DigitALL wrote:
    selected the "Restore" tab, then selected the dmg image from the disk, selected where to restore and and Go... but I get "+Restore Failure, Could not find any scan information. The source image needs to be imagescanned before it can be restored+" ...and now I am stuck!


    Under the Images menu item in Disk Utility you will find the function to *Scan Image for Restore…*. I seem to remember, however, that the disk image must be compressed disk image for it to be scanned. You may need to use the Disk Utility -> Image -> Convert… function to compress the disk first.
  • baltwo Level 9 Level 9 (61,945 points)
    I suggest a bootable backup/clone is a better alternative than a disk image. Use Carbon Copy Cloner or SuperDuper! Additionally, if you can mount the image, you should be able to restore it if you have another boot volume.