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Old 08-20-2011, 12:43 AM   #1
tculley
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Join Date: Aug 2011
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Restoring from DMG

I've found myself in a bit of a rough spot. My Mac wouldn't boot because of a corrupt file system, so I used the Disk Utility in the Recovery HD that Lion gives you to make a backup dmg of my hard drive on an external drive. I then wiped the HD and did a clean install of lion. The only problem is, I have no idea how to restore the .dmg. I have tried using the disk utility and placing the dmg in the source field to restore to my HD (which results in a message that the dmg needs to be scanned, and then when I scan it, it gives me an error). I have also tried to use the entire partition on the external drive that the dmg is located. This actually seemed to work, it took about 2 hours and then said it was complete, except the only HD recognized as a boot device by my mac was the Recovery HD. Can anyone give me any tips on how to get my files back from the dmg I have or restore it to my new HD?

Thanks!
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Old 08-20-2011, 02:57 AM   #2
benwiggy
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Quote:
Originally Posted by tculley
My Mac wouldn't boot because of a corrupt file system,

Please describe what happened here and how you fixed it in more detail.
Quote:
Originally Posted by tculley
I have tried using the disk utility and placing the dmg in the source field to restore to my HD (which results in a message that the dmg needs to be scanned, and then when I scan it, it gives me an error)

What is the error message?
Quote:
Originally Posted by tculley
the only HD recognized as a boot device by my mac was the Recovery HD.

Is the external formatted correctly to be an Apple boot device -- GUID partition scheme?

My first thoughts is that your hard drive is faulty and may need replacing. That would explain the initial corruption and the problems with the DMG image not working properly.
Verify and Repair the drive (NB drive, not permissions) and check the SMART status in Disk Utility.
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Old 08-20-2011, 09:16 AM   #3
tculley
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The problem started when I restarted my mac after being in my windows partition. I help the option key to select my Mac HD, and it would just get stuck at the apple logo and never load. I left it on overnight, still stuck on the apple logo.

I tried to verify and repair the disk, even from single user mode, to no avail. So I simply clicked on my Macintosh HD, and made a new image out of it onto an external HD.

The error message I am receiving is first it says that the disk image must be scanned, so I click Scan Image. When I do that it says unable to scan (resource busy).

On my Macintosh HD it says smart status verified and GUID partition table. On my external HD it says SMART status Not Supported and GUID partition table.

I'm using the mac fine right now on my clean install, just need to get my files back.
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Old 08-30-2011, 12:10 AM   #4
Foda
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Re: restoring from DMG

Ok, I think I figured this one out. I am installing a new HD in my MacBook and made an image of my old drive first, then tried to restore the image on my new blank partition, but got the same error you did.

After playing around for a few minutes, I found the FILE --> OPEN DISK IMAGE option in the menu. This mounted the disk image, and I now seem to be able to use the mounted DMG from the lower left side of the window as the source for my restore.

Good luck!
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