Disk Utility repair problem

I am running Yosemite on an mid-2011 iMac. I ran the Disk Utility and got this message after running Verify:
<< Error: 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 X Utilities window appears, choose Disk Utility. >>
I followed the instructions, but when the Utilities window appeared, I was unable to start the Disk Utility from the menu. There was a dialog saying that OS X had not been successfully installed.
What could be causing this problem?

The startup drive may be failing, or there is some other internal hardware fault.
Back up all data on the drive immediately if you don't already have a current backup. There are ways to back up a computer that isn't fully functional—ask if you need guidance.
Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.
If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.
Keeping your confidential data secure during hardware repair
Apple also recommends that you deauthorize a device in the iTunes Store before having it serviced.
*An SSD doesn't need to be zeroed.

Similar Messages

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    i am trying to run disk utility to clean up my hard drive. i was able to verify and repair permissions without a problem. i have run into 2 problems with disk repair:
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    2 - the repair disk button is nonoperable (doesn't light up) so there is nothing to push for the repair.
    i could use any help you can offer. screen shots are available upon request.
    thanks,
    j

    Hi Dr,g
    The startup drive can only be repaired from another drive. You cannot repair the boot drive from your HD (which is your boot drive). You have to boot from the install disk.
    To do this: Insert the Install Disk 1 into the drive and then select Restart; when you hear the chime hold down C key until the apple logo appears.
    This will take you to the installation software, but you do not want to install.
    Select your language, then go up to the top menu bar to Utilities and navigate to the Disk Utilities application.
    Select the start up drive, then follow the instructions in the First Aid pane where you can click on Repair Disk.
    If it finds errors, repeat the process until it reports no errors.
    After these repairs, quit the application, and restart normally.
    Once restarted normally run Repair Permissions. from the Disk Utility application found on your hard drive in Application/Utilities.
    regards roam

  • Internal Hard Drive Disk Utility Repair Problem

    Hello all! I'm really hoping someone can help me out because I'm in a bit of a panic right now about all of this.
    For starters, I have a Mid-2007 20" Intel based iMac.
    The other day, I turned on my computer and got a flashing question mark and the computer would not boot. Luckily, I have an external hard drive, so I went through the process of using the Install Discs to use the Hard Drive to start up my computer. Everything worked out and once the computer turned on, I was able to access my Hard Drive and had full access to my files. I powered down my computer as I had to run out the door for school and was planning on backing all of my files up on my external hard drive tonight.
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    I accessed the Disk Utility, and it was the first place I was able to locate my Hard Drive. On the left hand side, underneath the external drive, it simply says "Media". I cannot click on ANY of the options under First Aid and the only thing it seems I can do is Erase the drive.
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    Can anyone help me out here?
    If you need any more details about my computer/the actions I took, just let me know.
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    If you cannot access the internal HD then it may have crashed, I am getting you may not have been backing up either so if it has crashed and you don't have a backup then your data is probably gone. If you can get the internal HD to show up again before you do ANYTHING else back it up using Time Machine (assuming you use 10.5.x or above) or create a clone on an external HD using either SuperDuper or Carbon Copy Cloner.
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  • HT4790 My Mac OS Lion 10.7 FileVaulted HD does not boot, prohibitory sign, stop sign appears some minutes after boot starts. Disk Utility repair shows four error messages: Unable to bootstrap transaction group 2517: inconsistent crosscheck (the same with

    My Mac OS Lion 10.7 FileVaulted HD does not boot, prohibitory sign, stop sign appears some minutes after boot starts. Disk Utility repair shows four error messages:
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    Problems were encountered during repair of the partition map
    Error: Storage system verify or repair failed.
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    I suppose it is serious bug in Mac OS Lion managing FileVault and wonder what the help could be?

    Most likely culprit is your Lacie drives which are notorious for flaky power supplies which cause just the sort of erratic behaviour that you describe. Have had similar issues myself. Lacie has been good about replacing my power converter-- twice. If you have seven of them, good luck finding the bad one or more. Like I said, the behaviour is erratic. Sometimes it'll work sometimes not. I can't comment on Samsung drives because I've never used them and have never heard anything about them. Same with Softraid. Why not just use Disk Utility. Sounds like you're ready for an external hardware raid. This will be much faster, much more reliable, and may even be cheaper than seven firewire drives. Check out G Tech, and Maxx Digital for starters.
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  • Can Disk Utility repair FAT32?

    hi, folks:
    I'm jammed up. I need to repair the drive in my PS3. It's FAT32-formatted. Im a Mac user, obviously. Can Disk Utility repair it, or does it only do Mac discs?
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    Grf. This wasn't the answer I wanted, but it's what I needed. Thanks, Kurt. I'm now off on a quest to find a Windows laptop. I appreciate the quick response.
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  • Disk utility repair permissions stops altogether

    I tried running Disk Utility Repair permissions and received a grey message box saying it stopped repairing permissions because of the following error:
    Error: The underlying task reported failure on exit.
    This same error message was repeated in the usual information box that disk utility uses to provide detail about what it is doing.
    I believe the problem occurred because I selected Macintosh HD and added another user (myself) to read/write in the disk permission section of the information window, and I also applied that to all enclosed items. I did this in the first place because of repeated attempts and failuire to install the latest version of skype into my applications folder (being told that I didn't have enough permissions to complete the overwrite task). When I tried verifying the disk I received the error message "ERROR: could not freeze volume permissions denied"
    I switched users to a specific administrator account that I reserve for troubleshooting, but got the same result when I tried running disk utility.
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    everything was working well until i did this large change permissions operation.
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    John

    John Fountain wrote:
    I believe the problem occurred because I selected Macintosh HD and added another user (myself) to read/write in the disk permission section of the information window, and I also applied that to all enclosed items.
    Uh-oh. You completely trashed your whole system by doing that. Boot up from your Leopard DVD and restore that last Time Machine backup that was made before you made that mistake. If you don't have any backups you will have to reinstall Leopard.
    I did this in the first place because of repeated attempts and failuire to install the latest version of skype into my applications folder (being told that I didn't have enough permissions to complete the overwrite task).
    When that happens, just trash the old application first, then drag in the new one.
    When I tried verifying the disk I received the error message "ERROR: could not freeze volume permissions denied"
    I switched users to a specific administrator account that I reserve for troubleshooting, but got the same result when I tried running disk utility.
    Changing permissions on the HD and applying to enclosed items hosed your whole system. That's what's causing all your problems. It's doubtful that you will be able to repair it. Restore your system from backup, or reinstall.

  • Disk Utility: "Repairing disk failed with error Could not unmount disk"

    Disk Utility: “Repairing disk failed with error Could not unmount disk”
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    Thank you for these useful links!
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  • My MacBook Pro started running very slow. I did disk utility/repair

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  • Disk Utility/Repair Help Please...

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    Those messages are normal and may be ignored.
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  • Disk Utility repairs permissions; 1 hour later they're un-repaired again.

    (March 2009 24" iMac. Lion 10.7.3)
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    I'd like to delete this post (if I knew how).  There are several other threads on this topic, and other contributors report exactly what I observe.  It turns out it's a harmless artifact of upgrading from 10.5 to 10.6 to 10.7, rather than doing a clean install of Lion.  This article is reassuring: http://support.apple.com/kb/TS1448
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  • Does disk utility repair delete any files on external hard drive?

    Does disk utility repair disk delete any files on the external hard drive?

    diskutil list
    Last login: Sun Dec 21 16:07:46 on console
    Justins-MacBook-Pro:~ justinmontoya$ diskutil list
    /dev/disk0
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       0:      GUID_partition_scheme                        *750.2 GB   disk0
       1:                        EFI EFI                     209.7 MB   disk0s1
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       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
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       0:                  Apple_HFS Macintosh HD           *748.9 GB   disk1
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  • Problem With Disk Utility - Repair Permissions

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    Problem resolved. I'm posting this note for anyone else who might run into this situation and come across this discussion.
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