Disk Utility, disk image help

I want to burn a disk image onto a disc using disk utility, however i dont know how to and my blank disk is smaller than the disk image size. SO i need to compress it. Can anyone tell me what to do and how i can burn a disc image onto a disc which is too small?

Not all disk images are compressed, but you can't make a compressed disc (not with standard software). You can store a compressed disk image on a disc, but it won't behave like a normal disc (e.g., you'd need to mount the disc, then mount the disk image stored on it separately). If you want to create a normal, mountable disc, you either need to get a physical disc of the appropriate size and burn the uncompressed image onto it (Disk Utility has a Burn item in one of its menus), or you'll need to reduce the size of the uncompressed disk image to fit the size of the disc you have.

Similar Messages

DISK UTILITY -- "New Image" problems

Maybe I don't get how this works. I used an external USB drive to back up my MacBook Pro, making an image un=sing Disk Utility "New Image." THis seems to have worked fine. When I attach the external drive and double click on the DMG file it open and I seem to have access to all contents.
Today I tried to make a second "New Image" on the same drive of my iMac24" and everything runs and makes a DMG file, but when I click on this one I get a msg saying the disk image "couldn't be opened" with the reason given being "no mountable file systems."
Does this make perfect sense to somebody?
Have I completely misunderstood the use and practice of the "new image" in Disk Utility?
Thanks.

Hey. If you want to make a DMG image of your iMac, you will need to boot off the install DVD and use Disk Utility from the DVD. To create the DMG is the same process: Select the "Macintosh HD" icon on the left hand side list of Disk Utility, click the "New Image" button, leave "Image Format" as "Compressed" and its up to you for Encryption, I always leave it as "None".
Select to save your DMG image on the external hard drive and click save. Once the image is done, click on "Image" on the menu bar and click on "Scan Image for Restore...".
That's it!
Good luck

Phantom restarts / crashes with Maverick. Restore Disk Utility, disk can't be repaired says "live system repair is not supported" Is there a fix yet? Or is Maverick "FREE" because Apple no longer offers free phone support?

Phantom restarts / crashes with Maverick. Under restore Disk Utility, disk can't be repaired says "live system repair is not supported" Is there a fix yet? Or is Maverick "FREE" because Apple no longer offers free phone support?

Get onto the integrated iOS + Mac OS and end support for "legacy" Mac 10.8 and earlier.
Force older hardware users like me to upgrade to new hardware which is where $$ are.
Make apps work across tablets, phone, and computer with similar (though not the "same" app, but able to read and use the same file format).
Simplify.
I don't think anyone incl. Microsoft knew Windows 8.1 was going to be a free upgrade, I didn't and read that it would be more like $30.
No OS is ready for everyone on the day it is launched. iOS 7 is now 7.04 and climbing, Mac OS tends to really not be ready until the last patch and version is out, often a year or more after it was first issued. Ship it, then plan to fix the bugs left in or that surface.
www.macperformanceguide.com is saying "No" to Maverick for now. Of course there will be no "No" on new Mac Pro 2013 6,1 when those ship (Late Jan? )

Cannot Burn Disk Image to DVD in Disk Utility!! Help

Have always been able to burn a DVD of a particular video I made.
I saved it as a disk image then I burn it in disk utility. I have burned doaens of the same file, now I am getting the error message "the device drained its buffer without burn underrun protection"
I am not running any other programs during the burn. Can anybody help me?
I am using OS 10.3.9

Hi, just asking, are you trying to burn the DMG, or restore it to a DVD?

Disk Utility: Create image fails with input/output error

Starting to create an image and saving it into an external hard drive (MacOS extended Journaled).
It starts after less than 60 secs it comes out with an error : Failed to create the image (input/output error)

If you don't mind I'd like to discourage you from backing up a drive onto a disc image file no matter where you plan to save it. Disc image files can be very problematical when it comes to trying to restore the backup. Furthermore, you cannot boot from a disc image. If the disc image file becomes corrupted then you have no backup.
I would like to propose that you think about a better way to backup your drive. You can clone the drive to your backup drive. It's easy to do using Disk Utility's Restore feature. A clone backup is not only bootable but you have direct access to all the files on the backup.
In order to make a bootable clone open Disk Utility. Select Disk Utility Help from the Help menu. Search for +duplicating a disk+. Click on "Duplicating a disk" at the top of the list of articles. Follow the directions.

Disk Utility - Create Image Fails

Hello all -
I'm trying to make an image of one of my hard drives as a back up. I've followed the instructions in Disk Utility help, but when I click "Save" to try to create the image I get a failure message "Unable to create <Disk Name>. (Resource Busy)".
I've tried saving to the destination with a new folder, that did not solve the problem. No other applications are running and both the source and destination disks are mounted and appearing on my desktop. The source is a USB connected drive, destination is a firewire drive, and I can read and write to both the source and destination disks.
Anyone have any idea what this failure message means and how to correct the problem? Thanks - Randy

If you don't mind I'd like to discourage you from backing up a drive onto a disc image file no matter where you plan to save it. Disc image files can be very problematical when it comes to trying to restore the backup. Furthermore, you cannot boot from a disc image. If the disc image file becomes corrupted then you have no backup.
I would like to propose that you think about a better way to backup your drive. You can clone the drive to your backup drive. It's easy to do using Disk Utility's Restore feature. A clone backup is not only bootable but you have direct access to all the files on the backup.
In order to make a bootable clone open Disk Utility. Select Disk Utility Help from the Help menu. Search for +duplicating a disk+. Click on "Duplicating a disk" at the top of the list of articles. Follow the directions.

Disk Utility - Disk Image Restore Failure

Hi folks, when trying to restore a disk image I have had the error message:
< Starting Restore…
Could not establish communication with helper tool.
Starting Restore…
Parasite died
Lost connection to helper tool>
I have searched the discussions, apple support & googled & ask.com & found a number of references to this but no actual fix. Anyone help please?
Carbon Copy Cloner works ok but not with an image.
I tried Super Duper! which gave the following message:
| 12:57:14 PM | Info | SuperDuper!, 2.5 (84), path: /Applications/SuperDuper!.app, Mac OS 10.4.11 build 8S165 (ppc)
| 12:57:14 PM | Info | Started on Sat, Jan 24, 2009 at 12:57 PM
| 12:57:14 PM | Info | Source Image: /Users/stevebemand/Desktop/Silicus OS 9 backup.dmg, name: Silicus OS 9 backup
| 12:57:14 PM | Info | Target Volume: Melchior, mount: /Volumes/Melchior, device: /dev/disk0s14, media: WDC WD2500BEVE-00WZT0, interconnect: Internal ATA, file system: "Journaled HFS+", OS: N/A, capacity: 33.95 GB, used: 0.03 GB, directories: 4, files: 10, ejectable: NO, ACLs: Disabled
| 12:57:14 PM | Info | Copy Mode : Copy all files.
| 12:57:14 PM | Info | Transcript : RestoreTranscript.plist
| 12:57:14 PM | Info | PHASE: 1. Prepare to Copy Files
| 12:57:14 PM | Info | ...ACTION: Preparing Melchior
| 12:57:14 PM | Info | ......COMMAND => Verifying the integrity of volinfo.database
| 12:57:14 PM | Info | volinfo.database OK
| 12:57:14 PM | Info | ......COMMAND => Enabling permissions on Melchior
| 12:57:15 PM | Info | Refreshing Disk Arbitration ...
| 12:57:15 PM | Info | ......COMMAND => Verifying that permissions are enabled for Melchior
| 12:57:15 PM | Info | Permissions on '/Volumes/Melchior' are enabled.
| 12:57:15 PM | Info | ......COMMAND => Verifying that Melchior ACL support matches Silicus OS 9 backup
| 12:57:15 PM | Info | ...ACTION: Preserving Spotlight state on Melchior
| 12:57:15 PM | Info | ......COMMAND => Preserving Melchior spotlight indexing state
| 12:57:15 PM | Info | PHASE: 2. Copy Files
| 12:57:15 PM | Info | ...ACTION: Copying files from Silicus OS 9 backup to Melchior
| 12:57:15 PM | Info | ......COMMAND => Restoring Silicus OS 9 backup to Melchior
| 12:57:15 PM | Error | asr: unrecognized argument: "-noverify"
It will be noted that this is an OS9 image, I've made a small partition just for running Reason/Rebirth.
But I don't think the fact it's OS9 should be an issue.
The current main start-up disk is a OS X clone made by CCC on a Western Digital 250gb HD, but the above problem on the source disk Disk Utility was the reason I used CCC to clone in the first place (if you see what I mean).
I'm trying to avoid putting the old disk back in but I will if I have to : I am assuming that the problem was on the source disk therefore I can deal with it on the OS X clone.
Cheers if anyone can shed some light,
Steve B

Yes I do have access but I'm afraid I blew the firewire bus on this TiBook last year (noted elsewhere in the discussions) so can't do target mode. Twas a terrible blow to an otherwise mint book...
I have been using it since & the damage seemed to be limited to the lack of firewire & inability to sleep.(the laptop not me!!!)
I'm not yet in the position to buy a new book (or even a £200 logic board which is the only way of restoring the firewire (which I might do yet as I am a Rebirth fanatic & it only runs on OS9)
The only way I can remotely work on this is by removing the disk & putting it in one of my enclosures.
As a matter of interest what action were you going to suggest?
Cheers,
Steve

Disk Utility - Scan Image for Restore - Freeze

I backed up my wife's iBook by starting her computer in target disk to my iBook which has a huge external attached. After about an hour, the image process was complete. Apple disk utility help says next to scan image for restore (not too sure why because I'm not restoring anything unless her drive dies). I begin the scan image for restore and get the progress bar that never shows and progress. Just keeps spinning/scanning for hours and I have no option to shut if off. Can't move external to trash because it in use, etc.
Does this mean the original disk image may be bad? Do over?
I'm using Disk Image as a solution for a total disk backup if a drive fails. No messing around with reconfiguring apps, etc. (i.e. plug and play) Is this the best way to do this?
I come from the Mac Plus days. Hopefully I can contribute to the new OS discussions at some point. Thank you much!

What format is the external drive?
Is it Firewire or USB?
Does the external drive have one of those front button touch things, like a My Book?
I'm using Disk Image as a solution for a total disk backup if a drive fails. No messing around with reconfiguring apps, etc. (i.e. plug and play) Is this the best way to do this?
I prefer a Clone myself.
Get carbon copy cloner to make an exact copy of your old HD to the New one...
http://www.bombich.com/software/ccc.html
SuperDuper...
http://www.shirt-pocket.com/SuperDuper/
Have a look at Synchronize! Pro X 6.0.5
http://www.macupdate.com/info.php/id/6897/synchronize!-pro-x
Or the most expensive one & my favorite, ...
http://www.tri-edre.com/english/tribackup.html
Does this mean the original disk image may be bad? Do over?
It can take quite awhile, and the progress bar isn't accurate at all, but it sounds like something is wrong.

Error using Disk Utility 'New Image'

I keep trying to make a new image of DVD's using Disk Utility, but it keeps giving me an error message. I'm at work right now and can't remember the specific message, but I've tried several times and it keeps interrupting the process. I've made copies before without any problems, then all of a sudden this started. I still have about 26 gigs free on the hard drive, and these discs are nowhere near that much memory. Anybody have this problem or know how to solve it?

I was able to extract the video from DVD to .m4v format using handbrake. I still could not get iMovie to recognize the file. I then changed the .m4v to .mov and it was recognized. Once I edited my movie I did not realize that sharing would take sooo long to burn back to iDVD. I had a 56 min video clip and it took 3-4 hours to share. I was up all night, but I have a DVD to turn in for my ALCMS training video. Hope this helps!

Disk Utility 'Disk Image from Folder' looses file create date?

Hi,
I have been working on creating backups that maintain the files' create dates. I have found the following anomoly using Disk Utility.
If I create a Disk Image From Folder, the create dates of all files are changed to be the same as the last modify dates. Not what I want.
If I creat a Blank Disk Image, and then using Finder to copy the files to the Disk Image, the create dates remain unchanged.
I can then burn the backup CD's with the Disk Image and the files' create dates are maintained. So, future restore from the backup CD will contain the original files' create dates.
Does anyone know if Disk Utility's Create Disk Image from Folder is supposed to loose the files' create dates? What other file attributes are being lost? Mac OS X maintains all of these attributes, and create dates via Finder copies, I would expect the Disk Utility Create Disk Image from Folder to do the same.
Bob Horton

To follow up on this post, I know at least part of the answer. The difference between the two becomes clearer if you read the documentation (man pages) for hdiutil and asr. Image 1 will be created in file mode, whereas image 2 will be in block mode, ie bypassing the file system. Image 1 will consist of a series of files, whereas image 2 will contain a series of blocks, mirroring the original layout of the hard disk.
Technically the latter should be faster to restore (in block mode), although Apple recommend the first procedure (see man page for hdiutil). I haven't seen any evidence that images created in block mode can be mounted or restored, although you might be able to burn such images to a optical disks if applicable.
As I've pointed out in another thread (http://discussions.apple.com/thread.jspa?threadID=1508199&tstart=0) I believe that this functionality should not be offered in disk utility, and I consider it a serious bug.

Disk Utility: Create Image from Volume Without Unused Space

I'm trying to create a disk image from a mounted volume (flash memory in a video camera) but I don't want to write to it later, it's just for archiving. The problem is that the size of the original volume is 16 GB, so every image I create is huge, even if there is less than a 1 GB used.
For example, I only have two short clips on there, about 1.1 GB used. When I create a new .dmg from the volume, the file is 5.28 GB and when I mount it it tells me the size of the volume is 15.3 GB. Clearly I understand why this is happening, it's creating a bit for bit copy of the original volume, but I don't need all that space since I'm never going to write to it.
In disk utility it won't let me resize the image (it's grayed out). What do I do?

I actually don't understand why this is happening (when I do this the created disk image only uses the space it needs) but you can get around it as follows. First create a blank read/write disk image to the size you want and then restore the memory card to that image.

My mac is very slow at start up and throwing out its original boot disc, so i cant carry out any disk utility repair, any help

Hey guys, i have tried all the help i have so far been given but am still facing the same problem,
my mac is slow at start
i have tried to reboot with the os x 10.6 dvd but its just throwing it out
causing more and more frastration
can some one help

Hello,
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Does it boot to Single User Mode, CMD+s keys at bootup, if so try...
/sbin/fsck -fy
Repeat until it shows no errors fixed.
(Space between fsck AND -fy important).
Resolve startup issues and perform disk maintenance with Disk Utility and fsck...
http://docs.info.apple.com/article.html?artnum=106214

Cloned failed HD to new HD and OS X Recovery / Disk Utility is no help

My 500 GB internal HD recently failed on my 2010 iMac. So I cloned the 500 GB drive to a new 1 TB drive with a Sabrent Docking Station in order to keep my data and installed the new drive in my mac.
I figured either the new drive would just "work" because it was the old hardware (HD drive) that was previously bad and a new drive should be fine or I could recover via OS X Recovery or be able to use Disk Utility to repair the new drive if it wasn't working.
Well...I can't reinstall my OS with OS X Recovery because it says my new HD is "locked" and I don't know how to unlock it and Disk Utility is unable to repair my new drive.
The third problem is I can't find my original OS install disk that came with my mac so that's not an option either.
Not sure where do go from here?

rckwell wrote:
My 500 GB internal HD recently failed on my 2010 iMac. So I cloned the 500 GB drive to a new 1 TB drive with a Sabrent Docking Station in order to keep my data and installed the new drive in my mac.
I figured either the new drive would just "work" because it was the old hardware (HD drive) that was previously bad and a new drive should be fine or I could recover via OS X Recovery or be able to use Disk Utility to repair the new drive if it wasn't working.
Well...I can't reinstall my OS with OS X Recovery because it says my new HD is "locked" and I don't know how to unlock it and Disk Utility is unable to repair my new drive.
The third problem is I can't find my original OS install disk that came with my mac so that's not an option either.
Not sure where do go from here?
To your local Apple Store or AASP. To order a replacement to your original install discs call AppleCare, for a nominal charge they will help you replace it. You will need the serial number and a credit card. Expect the replacement cost to be about $30.

How to reinstall OS X? Disk Utility error. HELP!

My iMac failed start up normally so I have to enter the recovery mode (by holding the option key or command+R).
After researching online, I found my mac might have been corrupted. So I tried to use the first aid option in disk utility to verify and repair it but evertime I clicked repair, it shows a message "Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.""
I don't think I have a time machine backup as I tried the time machine back up option but there were no back-ups found. I can't create one now either since I'm on the starting gray screen. So I don't want to erase and reinstall since I don't have a back up.
So then I tried to reinstall OS X (Yosemite). But after following the first few steps, when it asks to choose the disk where you want to install the OS, it either says "this disk is locked" or "cannot install on Macintosh/Recovery HD." I still have about 273 GB available.
I've tried all this many times but it doesn't seem to work. I'm really stuck now and don't know any other option so please HELP!

If you want to preserve the data on the startup drive, and it's not already backed up, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data, you can skip this step.
There are several ways to back up a Mac that is not fully functional. You need an external hard drive or other storage device to hold the data.
1. Start up from the Recovery partition, from Internet Recovery, or from a local Time Machine backup volume (option key at startup.) Launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
If you use FileVault 2, then you must first unlock the startup volume. Select its icon ("Macintosh HD," unless you gave it a different name.) It will be nested below another disk icon, usually with the same name. Click the Unlock button in the toolbar. Enter your login password when prompted.
2. If Method 1 fails because of disk errors, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
3. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
4. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.

Help: Disk Utility: Disks need to be repaired

My MacBook Pro lately has been extremely slow and just constantly thinking and freezing.
I ran the Disk Utility to verify the disk and this is what came up:
"This disk needs to be repaired using the Recovery HD. Restart your computer, holding down the command key and the R key until you see the Apple Logo. When the OS C Utilities Window appears choose disk utility."
So I did this step and went to repair it. But when I said repair disk, it said that the disk seems to be Okay.
Why does it say that? How can I fix my computer, or do I need to go to the Apple Store. Please Help.
Thanks

Looking at your top screenshot:
That appears to be the NETWORK version of Disk Utility.
From this I conclude your Internal Hard Drive was seen as failing, and it would not boot to the Recovery_HD partition on the Internal Hard Drive, and went for the Online/Network version of Recovery_HD (from the Internet) instead.
I think you should take it in for service and expect that they are likely to replace the Hard Drive and give it back to you with a new drive with ONLY Mac OS X (no user files) installed.
AppleCare warranty and SSD:
Like most warranties, AppleCare covers defects in materials and workmanship. They will replace like-with-like, that is: they will give you the same drive or a slightly better one. I suggest you have it fixed and take advantage of whatever they will give you under warranty.
Apple does not sell the 2.5" form factor SATA SSD notebook drives that would just fit into the same space as your internal drive. These are very popular with upgraders, and users find they are somewhat faster, run cooler, and allow the battery to last longer. You can always replace the spinning internal drive later with one more to your liking, and run the old one in an external enclosure for more on-desk storage.
You do not void your warranty by installing an aftermarket drive such as an SSD, but the actual new drive would not be covered under the Apple warranty. (many Vendors warrant the drive separately for at least a year, sometimes longer).

Disk Utility, disk image help

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