Can;t read a .dmg created by disk utility

I am looking for help to get a restore from a .dmg from an external usb drive and restore to my macbook. The backup was taken from disk utility running on Snow Leopard.
Over the weekend I needed to update my macbook and install windows using the bootdisk application. I ran bootdisk and got an error telling me there was a problem with the partitions and instructing me to take a backup; fix the partition and then restore. Foolishly I took a disk image copy and not time machine.
Having fixed the disk I went to restore the image from the drive but got a message saying it could be restore as an “imagescan” has not been performed. I ran the scan image for restore from the disk utility and got a message that states unable to scan (broken pipe).
When I try and mount the image I get a I/O error and it will not open. If I run First aid on the image it say it is fixed!!!
Doe anyone know how to overcome this error? Is there a tool I can use to fix the images??

You could try the tips found here:
http://www.macosxhints.com/article.php?story=20070419082314524
And in the future, don't trust your files to one single backup, much less a backup on a disk image file. When you erased the hard drive, the backup became the original, but any slight bit of corruption in a disk image can destroy the whole thing, making this a very risky thing. You should always have *at least two* backups!

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I can no longer make dmg files in disk utility since upgrading to Mountain Lion

Hi everyone,
I'm a videographer, and have been using the facility in disk utility to make dmg backups of my media cards. It's proved to be a neat and tidy way of doing things, and is my equivalent to storing videotapes.
However, I no longer can make them.
My technique has been to:
1. select the memory card in disk utility
2. press new image
3. browse to destination for the dmg/hit save
4. sit back and wait for the process to complete.
this has been working for me in Snow Leopard, but not in mountain lion. I can't identify any other variables that have changed except the OS upgrade.
Firstly 'Authopen' prompts me for username/password. After username/password it starts creating the image, but stops with an error;
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The card is sitting in a media card reader. I tried another card reader that resulted in;
Unable to create "SD-Card.dmg." (Input/output error)
Anyone experienced this, or any ideas on what to try? As the card readers both work insofar as they show the memory cards in the finder etc, could there be a disk-utility-specific problem with them? Or do I need to change my procedure? I can copy the files to the hard drive and make a dmg from a folder, but I'd rather not have to do that.
thanks.
Andrew
Mac OSX 10.8.5, 2.66 GHZ Quad core Intel Xeon Mac Pro, 16GB Ram

Maybe just corrupted Disk Utility preferences ...
Open the Finder. From the Finder menu bar click Go > Go to Folder
Type or copy paste the following:
~/Library/Preferences/com.apple.DiskUtility.plist
Click Go then move the com.apple.DiskUtility.plist file to the Trash.
Restart your Mac then try creating a .dmg file.

"Can't read from or write to disk...." iPod error

I recently switched from my old PowerBook G4 (running Leopard 10.5.2) to a newer MacBook Pro (running Leopard 10.5.5). I migrated my account and permissions from the PB to the MacBook Pro, and everything is working just fine except for iTunes (version 8.0.2) and my older 160 GB iPod Classic (running 1.1.2).
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UPDATE:
OK, after the visit to my Genius Bar; I thought of a variable that wasn't previously considered. Because their transfer of media was successful without the slightest hitch, I had to figure out something else.
Everytime I had tried to sync the iPod with my various Macs, I was using the same process. Since all of my music and movies "live" on an external 500 GB drive, I was attempting to use that same drive whenever I would try to sync. It occurred to me that possibly the failing was in the drive and not the iPod.
I have part of that library on a Power Mac G4 867 DP (running 10.4.9). I updated the iTunes on that machine to 8.0.2, connected the iPod and made a successful transfer of a large amount of media!
My only problem now is that I can't figure out how to get the 500 GB drive to stop hanging on transfer and update of my Genius information. The drive just completely stalls and I get the spinning wheel from iTunes and the application ceases to respond. When I force quit iTunes, the drive recovers fine. I don't have any problems transferring data to and from it and Disk Utility reports that the drive is healthy.
I have tried re-installing iTunes on all affected Macs - didn't help. I believe my problem may exist in the iTunes Library file or in the associated .xml document. My only concern is that if I do a completely fresh install of iTunes where those files would be re-created, I would lose all of my play and ratings data as well as the information about when my files were added. On a related note, when playing the music from this drive through iTunes. I don't have any issues at all.
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Drive Preparation for Lion
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Unable to create "filename.dmg" (error -60008) {Disk Utility Problem}

Hi:
I’ve used Disk Utilities awesome capabilities many times, but am now running into my first real problem.
I am trying to create a 100 GB new blank disk image, using the “Mac OS Extended (Journaled) option for format, 256-bit AES encryption, a single partition-Apple Partition Map, and Image Format as read/write disk image.
When I implement this, it asks for the AES password then repeatedly crashes, albeit in slightly different ways each time. The most informative was a Unable to create “filename.dmg” (error -60008) message. I can’t find anything explanatory about this in Google
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This error occurs on both my home and work iMacs. It seems to reliably occur about 1/2 way through typing in my password. The error occurs whether I use 128 or 256 AES encryption.
There is more than adequate space on the hard drive I am attempting to place this image on. Disk Utility is version 12.1.1 (353) and all is running on a 2.66 GHz Intel Core i5 iMac.
Any advice would be greatly appreciated! Thank you
PS: This is a duplicate post from the OS Lion forums ( https://discussions.apple.com/message/18410534#18410534 ), but since a) it occurs on both my Intel iMacs, b) I totally rely on Disk Utility's capabilities, so this loss with the Lion upgrade really hurts, and c) we've had no luck in the Lion forums, we're hoping someone here has seen this issue and can help. Much appreciated.

Hello, I believe that's an authentication error, thinks your not an admin account. Might try this...
Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, move this folder to the Desktop for now...
/Users/YourUserName/Library/Preferences/ByHost /
reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)

Can't read any file within a disk image

A year ago I created a disk image with a few thousand files in as an archive. Periodically I open it and access the files.
Now when I open the dmg, I see all the folders and files, but none of them are usable. No application can open them, for example opening a jpg in Preview yields the message " The file “Picture 1.jpg” could not be opened. It may be damaged or use a file format that Preview doesn’t recognize. " I get similar meesages from Word, Acrobat, etc. for their files. Basically it appears that every file in the dmg is corrupt.
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Sorry that I'm late to this party, but in case somebody else comes by this thread, this is the way to measure the voltage from the 20V plugs:
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Ray Kawakami
X22;X24;X31;X41;X41T;X60;X60s;X61s;X300;X301;Z60m;Z61t;Z61p;560Z;600E;600X;T21;T22;T23;T41;R50;A21p;A22p;A31 and A31p
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.dmg files open disk utility. Can't install new software

For the last few months I've not been able to download and launch disk images (.dmg files). Instead of a dialogue asking if I want to launch the downloaded file or some other natural step in launching the disk image, I hear the hard drive boot as if I'm restarting the computer, and disk utility opens.
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This has happened twice when apple service folks ask me to download their app to view my desktop actions, and after some frustration they just give up and talk me through solutions the old fashioned way. One of them mentioned that I might be missing a certain script, but neither was willing when asked to help me solve the problem. Another asked that I try opening it with Safari (?) but like many apps it was greyed-out when I access the applications directory as mentioned above.
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I just solved this myself, having clicked on a related "More Like This" link after I posted...
After double clicking the .dmg file in my download directory and automatically launching Disk Utility, I selected the .dmg disk image in the left-hand column. I then clicked over to the "Restore" tab in the top-center of the Disk Utility panel.
In the upper row of control buttons, I clicked the "Open" icon. This was not an obvious choice because it is small and "Open" is not the function I was seeking. If you roll-over that icon it says it is for mounting or unmounting a disk.
The disk image then mounted on the first try AND once it was mounted the "Open" icon name suddenly changed (greyed-out) to read: "Mount." A bit of an odd and elusive process but much easier than other more invasive procedures (like "repairing permissions") to recreate that auto-mounting capability I had lost...

Can a RAID created by Disk Utility be connected to another Mac?

Hi There,
We're looking to upgrade our workstation storage (4x workstations) and have recently had issues with third-party RAID cards and third-party RAID enclosures.
If we were to purchase a JBOD enclosure and use Disk Utility to create the RAID, would the RAID be recognised on different Macs if the enclosures were moved around? I realise performance would suffer compared with dedicated hardware RAID.
The main reason for using disk utility is that the smaller 4-5 disk enclosures don't seem to have RAID 10 and we've noticed a rebuild issue with 2 of our RAID 5 enclosures. After reseraching online, it turns out to be an issue inherent with RAID 5/6 (bad sectors causing issues on rebuild).
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Cheers
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How can I read a PC created disc of dbx files on a Mac

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Does anyone know of a way of directly reading the disc on a Mac and accessing these files please.
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Mounting .dmg updates using Disk Utility?

Hello Apple Forum,
I've got a problem you might be able to solve.
Adobe Illustrator CS is crashing. I have posted the prob here and at the Adobe forum. The Adobe forum has advised me to install the 11.0.2. Illustrator update.
Can you tell me how to mount the .dmg file after downloading with Disk Utility? It's not just double click is it?

I concur with Alex that something is amiss with your system. Normally, double-clicking on a .dmg file will invoke DiskImageMounter which decompresses the .dmg image and puts a virtual drive on the Desktop, from which you can copy files or run an installer (this is what 'mounting' the .dmg disk image means). If you open a .dmg using Disk Utility, either via the 'Open Disk Image' command from Disk Utility's File menu of by control-clicking the .dmg file and selection Open With... to call up Disk Utility, you see a message window about "attaching disk image" while Disk Utility is mounting the mage.
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The refernce to using ther Finder's Go menu was to look for the mounted disk image in the leftmost pane of the Finder window that opens; e.g., if I doble-click "gc593x.dmg", after a few seconds I'll see a hard drive icon "GraphicConverter" in the Finder window and also on the Desktop. If I click on the GraphicConverter hard drive icon in the Finder window, I see that mounted drive's contents. What happens when you click on the mounted drive's icon on your Mac?

Copy of a CD (created by Disk Utility) not recognized by Windows or Linux

I created a copy of AutoCAD 2005 (not pirating it... just wanted a backup copy of the install CD).
I used Disk Utility (File > New > Disk Image From Folder) to successfully create a DMG file on my MacBook. I could mount the DMG and browse all the files on it.
I then burned a CD (Disk Utility > select DMG > click burn), which mounts fine on OSX. However, my Windows and Linux boxes will not recognize it (while they recognize the original CD just fine).
I tried again, this time setting the file format to DVD/CD master. It made a CDR file, which I burned to CD. Got the same result: Windows and Linux don't recognize it while OSX does.
So instead I burned the files to a CD ala drag and drop using Finder. This time the CD was recognized by Windows and I used it to install AutoCAD.
However, my understanding is that doing it this way won't work for a bootable CD, so I'd like to figure out why Disk Utility wasn't able to make an exact copy.
Any thoughts? Problem with copy protection? Problem with the CD's file system?
Details about the optical drive in my MacBook (1st gen 2.0GHz, 2GB RAM):
MATSHITA DVD-R UJ-857:
Firmware Revision: HBE4
Interconnect: ATAPI
Burn Support: Yes (Apple Shipped/Supported)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -RW, +R, +RW
Burn Underrun Protection CD: Yes
Burn Underrun Protection DVD: Yes
Write Strategies: CD-TAO, CD-SAO, DVD-DAO
Media: No
MacBook 1st gen CoreDuo 2.0GHz, 2GB RAM Mac OS X (10.4.8)

Yeah OS X's Disk Utility doesn't burn using the ISO 9660 file system while Finder does (I could swear I made a copy of an MS Office CD with Disk Utility, but maybe I'm remembering wrong). Anyway, Disco (a program I got in a MacHeist bundle) will make an exact copy of CDs. Anyone looking for a free solution, check out LiquidCD and burn, which may have the ability to copy Windows CDs (appears to be on their lists of features, but I haven't tried them myself).

Photo CD created by Disk Utility not seen by Windows

With my Disk Utility, I created a photo CD (appendable) - common .jpg, nothing special. When my daughter tried to print the pics with Windows, her PC said that the disk was blank. The Genius Bar at the nearest Apple store was not much helpful. Besides, my iMac considered the blank CD-R just 88Mb capable. Can anybody help?

Yeah OS X's Disk Utility doesn't burn using the ISO 9660 file system while Finder does (I could swear I made a copy of an MS Office CD with Disk Utility, but maybe I'm remembering wrong). Anyway, Disco (a program I got in a MacHeist bundle) will make an exact copy of CDs. Anyone looking for a free solution, check out LiquidCD and burn, which may have the ability to copy Windows CDs (appears to be on their lists of features, but I haven't tried them myself).

Does Time Machine utilize the password I created in Disk Utility?

Using Disk Utility, I created a volume (confidential.dmg) which contains personal information. Within Disk Utility, I also elected to require a password to open this volume.
Using Time Machine, I back-up the entire contents of my Mac to a fire wire drive.
If someone had possession of my fire wire drive, would they have to know the password I created in order to open confidential.dmg? Or are there other ways someone else could access the contents of confidential.dmg?
Thanks

Time Machine will just back up the encrypted disk image so yes, if somebody had access to your Time Machine they'd still need to know the password if they wanted to open it.

Array created using Disk Utility keeps disappearing.

I've got a 4-bay Drobo unit that I use for my iTunes and iPhoto libraries. I recently ordered a handful of new 2TB drives to max out the capacity on it.
In order to keep all of my data intact, I installed a couple of drives in a spare 4-bay disk enclosure and used Super Duper to duplicate the Drobo files onto half of the new hard drives. I then pulled two drives out of the Drobo (a 1TB and a 1.5TB) and used Disk Utility to create a concatenated disk set in the spare 4-bay enclosure.
Next step was to use Super Duper to duplicate the libraries from the two new drives (still in the spare 4-bay enclosure) to the new concatenated disk set (also in the 4-bay enclosure).
When that was finished, I pulled the two new 2TB drives out of the 4-bay enclosure and put them into Drobo with the other new drives, fired it up, formatted, and told Super Duper to duplicate the libraries from the concatenated disk set (in the spare 4-bay enclosure) to the newly supersized Drobo.
Maddeningly, the concatenated disk set keeps "unmounting" and disappearing from the Finder - usually right in the middle of a copy operation. I get a handfull of folders and their files, and then "Poof!" it disappears. Restarting the Mac has no effect; I have to unplug and repower the hard drives.
I've got about 1,300GB left to copy over; I can't sit there for thirty straight hours and babysit this setup. Anybody have any idea why this keeps happening?

You don't have a problem and repairing disk permissions does not need to be performed daily or on a regular basis - only after installing software (especially after installing 3rd party software that uses an installer) and as a system troubleshooting procedure only.
Check Maintaining Mac OS X for recommended maintenance for OS X (which isn't much) focusing on the Maintenance Myths section.

Can;t read a .dmg created by disk utility

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