How to restore mac to single partition?

Im shure this question has been aked before, however I am unable to find an anser to my specific problem.
I am trying to restore to a single OS X Mountain Lion patition on a iMac mid 2011  after allocating 300 GB to a seperat partition for Ubuntu. That 300 GB has been partitioned into 8 partitions, afer 3 or more installs of Ubuntu. When i try to erase the partitions i get errors like too small, un readable, unrecognized, etc. They are all blank. Is there any way to restore to one partition without wiping the hard drive and reinstalling mountain lion and using time machine for data on Macintosh HD partition? If not could you give me pointers and tips on how to wipe, reinstall, and restore to backup?
Thanks, Kundy
PS the hard drive is 1 tb and 700 GB for OS X has been untouched exept for resize for 300 extra partition.

You can try GParted.
http://gparted.sourceforge.net/

Similar Messages

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    Hi!
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       2:          Apple_CoreStorage                         1.3 TB     disk0s2
       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
       4:          Apple_CoreStorage                         905.9 GB   disk0s4
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       7:                 Apple_Boot Boot OS X               134.2 MB   disk0s7
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    |   |   ----------------------------------------------------
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    |   |   Status:   Online
    |   |   Size:     1292162457600 B (1.3 TB)
    |   |
    |   +-< Physical Volume 91499DB6-ED61-4BD9-A5FA-A3A469461673
    |   |   ----------------------------------------------------
    |   |   Index:    1
    |   |   Disk:     disk0s6
    |   |   Status:   Online
    |   |   Size:     801436540928 B (801.4 GB)
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    |       ----------------------------------------------------------
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    |       Encryption Type:         None
    |       Conversion Status:       NoConversion
    |       Conversion Direction:    -none-
    |       Has Encrypted Extents:   No
    |       Fully Secure:            No
    |       Passphrase Required:     No
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    |           ---------------------------------------------------
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    |           Status:                Online
    |           Size (Total):          2092978229248 B (2.1 TB)
    |           Conversion Progress:   -none-
    |           Revertible:            No
    |           LV Name:               Macintosh HD
    |           Volume Name:           Macintosh HD
    |           Content Hint:          Apple_HFS
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        =========================================================
        Name:         BOOTCAMP
        Status:       Online
        Size:         905864802304 B (905.9 GB)
        Free Space:   905512476672 B (905.5 GB)
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            Status:   Online
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    gpt show: /dev/disk0: Pri GPT at sector 1
    gpt show: /dev/disk0: Sec GPT at sector 5860533167
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               2          32         Pri GPT table
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    3: 00    0   0   0 -    0   0   0 [         0 -          0] unused     
    4: 00    0   0   0 -    0   0   0 [         0 -          0] unused

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    You can get
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    Open Disk Utility in your Utilities folder.
    After DU loads select your 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.
    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.
    Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
    Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
    Click on the Erase button. The format process can take up to several hours depending upon the drive size.
    3. Locate the saved Lion installer in your Downloads folder. CTRL- or RIGHT-click on the installer and select Show Package Contents from the contextual menu. Double-click on the Contents folder to open it. Double-click on the SharedSupport folder. In this folder you will see a disc image named InstallESD.dmg.
    4. Plug in your freshly prepared USB flash drive. You are going to clone the InstallESD.dmg disc image to the flash drive as follows:
    Open Disk Utility.
    Select the USB flash drive from the left side list.
    Click on the Restore tab in the DU main window.
    Check the box labeled Erase destination.
    Select the USB flash drive volume from the left side list and drag it to the Destination entry field.
    Drag the InstallESD.dmg disc image file into the Source entry field.
    Double-check you got it right, then click on the Restore button.
    When the clone is completed you have a fully bootable Lion installer that  you can use without having to re-download Lion.

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