12 Replies Latest reply: Jun 16, 2014 3:38 PM by CA3LE
Viraj Toronto Level 1 Level 1 (0 points)

Am trying to install Windows 7 using Boot Camp. Am receieving the following message in Boot Camp "The startup disk cannot be partitioned or restored to a single partition"

 

In Disk Utilty, I get the following message after clicking Verify Disk and Repair Disk buttons

 

Problems were found with the partition map which might prevent booting

Error: Parition map check failed becuse no slices were found

 

Any solution for above message?


iMac (21.5-inch Mid 2011), Mac OS X (10.7.3)
  • 1. Re: The startup disk cannot be partitioned or restored to a single partition
    Kappy Level 10 Level 10 (226,845 points)

    You will need to repartition your drive:

     

    You will have to backup your OS X partition to an external drive, boot from the external drive, use Disk Utility to repartition and reformat your hard drive back to a single volume, then restore your backup to the internal hard drive.

     

    1. Get an empty external hard drive and clone your internal drive to the external one.
    2. Boot from the external hard drive.
    3. Erase the internal hard drive.
    4. Restore the external clone to the internal hard drive.

      

    Clone the internal drive to the external drive

     

    1. Open Disk Utility from the Utilities folder.
    2. Select the destination volume from the left side list.
    3. Click on the Restore tab in the DU main window.
    4. Check the box labeled Erase destination.
    5. Select the destination volume from the left side list and drag it to the Destination entry field.
    6. Select the source volume from the left side list and drag it to the Source entry field.
    7. Double-check you got it right, then click on the Restore button.

      

    Destination means the external backup drive. Source means the internal startup drive.

     

    Restart the computer and after the chime press and hold down the OPTION key until the boot manager appears.  Select the icon for the external drive and click on the downward pointing arrow button.

     

    After startup do the following:

     

    Erase internal hard drive

     

    1. Open Disk Utility in your Utilities folder.
    2. After DU loads select your internal hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area.  If it does not say "Verified" then the drive is failing or has failed and will need replacing.  SMART info will not be reported  on external drives. Otherwise, click on the Partition tab in the DU main window.
    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Click on the Partition button and wait until the process has completed.  Do not quit Disk Utility.

      

    Restore the clone to the internal hard drive

     

    1. Select the destination volume from the left side list.
    2. Click on the Restore tab in the DU main window.
    3. Check the box labeled Erase destination.
    4. Select the destination volume from the left side list and drag it to the Destination entry field.
    5. Select the source volume from the left side list and drag it to the Source entry field.
    6. Double-check you got it right, then click on the Restore button.

     

    Destination means the internal hard drive. Source means the external startup drive.

     

    Note that the Source and Destination drives are swapped for this last procedure.

  • 2. Re: The startup disk cannot be partitioned or restored to a single partition
    Viraj Toronto Level 1 Level 1 (0 points)

    Does the external drive has to be of same size as internal drive size (500 MB) for cloning?

  • 3. Re: The startup disk cannot be partitioned or restored to a single partition
    Kappy Level 10 Level 10 (226,845 points)

    No, but it does need to be large enough to hold all the data on the drive you are backing up.

  • 4. Re: The startup disk cannot be partitioned or restored to a single partition
    Viraj Toronto Level 1 Level 1 (0 points)

    Am backing up my data using Time Machine on external HDD. Can I use the same external HDD to clone the internal HDD. Its 320 GB and my current internal HDD is used only 35 GB out of 500 GB.

  • 5. Re: The startup disk cannot be partitioned or restored to a single partition
    The hatter Level 9 Level 9 (58,885 points)

    You could shrink the partition and create one of say 60GB so you have a bootable partition for OS X;

     

    You could create a sparse disk image also and backup to that which also can be used to restore from, gives you the option of using CCC or SuperDuper as well as Disk Utility.

  • 6. Re: The startup disk cannot be partitioned or restored to a single partition
    Kappy Level 10 Level 10 (226,845 points)

    Yes, you can use that drive for the clone. When you are done with everything you can reuse the drive for a new Time Machine backup.

  • 7. Re: The startup disk cannot be partitioned or restored to a single partition
    Viraj Toronto Level 1 Level 1 (0 points)

    This is the solution that worked for me, which was told by Apple Care phone agent.

     

    1. Shutdown the Mac

    2. Restart it. Hold Command + R. It will take around 5 mins for option screen to display

    3. Select Disk Utility

    4. Erase the content of Macintosh HD. Ensure you have backed up the drive, before step 1.

    5. Once step 4 is completed, close the Disk Utility. It would again take you to the main screen.

    6. Select Reinstall Lion OSx.

    7. Installation of Lion OSx taken around 60 - 90 mins

    8. Once you login into Lion OS, restore the backup from Time Machine

    9. Go to Applications ---> Utilities ---> Migration Assistant.app. Select the first 2 check boxes (Users & Applications). I did not select Settings checkbox, since I didnt wanted to overwrite the old settings.

    10. Once restore is finished, you are able to use the system as you intended. In my case now, the Boot Camp did not throw me the error "The startup disk cannot be partitioned or restored to single partition"

     

    Go ahead and install Windows 7.

  • 8. Re: The startup disk cannot be partitioned or restored to a single partition
    monstrata Level 1 Level 1 (0 points)

    I am trying this method but I keep getting the error "Couldn't unmount disk" when I try to erase the drive in Disk Utility even when I boot from a USB recovery... help?

  • 9. Re: The startup disk cannot be partitioned or restored to a single partition
    The hatter Level 9 Level 9 (58,885 points)

    try shrink method

  • 10. Re: The startup disk cannot be partitioned or restored to a single partition
    berthin Level 1 Level 1 (0 points)

    I have nothing to loose on the hard driver can I do it without the external hard driver? I f I just go through the process?

  • 11. Re: The startup disk cannot be partitioned or restored to a single partition
    berthin Level 1 Level 1 (0 points)

    Does it mean that without an external driver the Disk Utility can not restore the partitions. I have tried all the methods above still 'it cant be restored. I want disk drive to be restored to one partition so that i can manage to run other program like Adobe.

    Please if there some who understands my problem help me.

  • 12. Re: The startup disk cannot be partitioned or restored to a single partition
    CA3LE Level 1 Level 1 (0 points)

    I fixed it with disk utility without reformatting.  Just use the 'partition' tab and remove the MTS partition that windows creates... resize and try again.  Don't even need a reboot.  Found at http://support.apple.com/kb/TS5383