Previous 1 2 3 Next 38 Replies Latest reply: May 28, 2015 4:48 PM by demondoink
khenryashley Level 1 Level 1 (20 points)

I am trying to remove the an ex bootcamp partition..

 

I initially went into disc utility. Chose the partition containing the windows and clicked on the - button.

 

This has removed the windows stuff in the partition but left the partition there.

 

When I click on the partion in disk utility all the options in disk utility are greyed out.

 

It won't let me drag the main partition down to extend it and remove the windows partition.

 

Baiscally it will not let me do anything with the partition.

 

I have tried using bootcamp assistant but this will not let me do anything. (tried reinstalling windows but would not format the partition) Error

 

The reason I was deleting the partition was to do a complete format of my hard drive and a clean install of Lion.

 

I just can't remove the windows partition.

 

I have even tried the disk utility at start up (cmd an r) still all greyed out on the windows partition.

 

Any help would be apprecaited.

 

PS:Tried Stellar partitionmanager but it wont work on an encrypted drive. Didn't know my drive was encrypted.


MacBook
  • LowLuster Level 6 Level 6 (12,050 points)

    Do not use Disk Utility. Use the Boot Camp assistant program to remove both Windows and the partition. Please Read the BCA instructions.

  • khenryashley Level 1 Level 1 (20 points)

    Thanks for the reply.

    As I have said im my original post Boot camp assitant is not let me do anything.

  • BobTheFisherman Level 6 Level 6 (11,195 points)

    khenryashley wrote:

     

    Thanks for the reply.

    As I have said im my original post Boot camp assitant is not let me do anything.

    Because you already incorrectly used Disk Utility. Make a backup of your data then format your disk and reinstall OSx.

  • ds store Level 7 Level 7 (30,310 points)

    khenryashley wrote:

     

    The reason I was deleting the partition was to do a complete format of my hard drive and a clean install of Lion.

     

    If your doing a complete drive reformat, this includes/deletes ALL the partitions on the drive including

     

    1: EFI (hidden)

    2: MacintoshHD partition (OS X, programs and files)

    3: Bootcamp partition

    4: RecoveryHD

     

     

    To do this you hold commmand option r keys down and boot the Mac into Internet Recovery which loads from Apple's servers.

     

    Next you select your internal boot drive on the left in Disk Utiliy, click Partition and 1, Option: GUID, Format: OS X Extended Journaled and click Apply.  All the partitions will be erased.

     

    If you have a boot hard drive (no SSD), it's a good idea to also Erase > and move the slider one spot to the right (Zero) and also do that. to map off bad sectors on the drive before putting data on them.

     

    Quit and install OS X with your AppleID and password, then upgrade later.

     

     

    If you don't have Internet Recovery, you use the 10.6 install disks and hold c or option/alt to boot from those and do the same thing.

     

    How to erase and install Snow Leopard 10.6

     

     

    So since your removing Lion and BootCamp anyway, you can do both at the same time.

     

    Erase, formatting, OS X installs on Mac's

     

    How to reformat a used Mac

  • khenryashley Level 1 Level 1 (20 points)

    Many thanks for your reply.

     

    When I boot the mac into internet recovery mode and clik on disk utilites, and select the boot drive the option key is greyed out.

  • ds store Level 7 Level 7 (30,310 points)

    Select Volume Scheme: 1 , then click the box, then click Option: GUID, then OS X Ext J as the format.

  • khenryashley Level 1 Level 1 (20 points)

    The volume scheme (i presume you mean the partition layout drop down box) is also greyed out.

     

    Thanks

    Ash

  • LowLuster Level 6 Level 6 (12,050 points)

    You have to select the Drive model number, the Top Entry, not the partition Macintosh HD. then those options will be available.

  • khenryashley Level 1 Level 1 (20 points)

    Ok

    Now I can carry out the instructions. Everything went well until it stopped with the error message

    Couldn't modify partition map because file system verification failed.

    Another error message I got was "couldn't I mount disk"

    Thanks

    Ash

  • ds store Level 7 Level 7 (30,310 points)

    Couldn't modify partition map because file system verification failed.

     

    "couldn't unmount disk"

     

    You  have failed sector or corruption in your GUID Partition Table , this is the scheme that tells the hardware what partitions and their locations on the boot drive. It appears first then all your other partitions come afterwards.

     

    Screen shot 2013-07-02 at 8.25.31 AM.jpg

     

    What we will try to do is get a alternative Partition Map scheme to install there and get it to erase it, and once that's completed then we can set it back to the GUID that OS X needs.

     

     

    Try both on the whole drive:

     

    1: Click on Option: MBR  Format: MSDOS and click Apply


    2: Click on Erase Tab, then move the slider one spot to the right (Zero erase) and click Apply. (this will take some time to complete)

     

    If you could only do #2, then do #1 and see if it now works. The object is to see if you can regain control of changing your Partition Map Scheme or not.

     

    #2 needs to be completed to map off the failed bad sector and the whole drive gets done in the process. why it takes so long to complete.

     

     

    3: Click back on the Partition tab and Partition Layout: 1, then click the Box and click Option: GUID and Format OS X Extended Journaled and give it a name MacintoshHD.

     

    4: Quit and install OS X using your AppleID and password.

  • khenryashley Level 1 Level 1 (20 points)

    Partition failed

    "couldn't unmount disk"

     

    This is the error message I am now getting whilst following your instructions..

     

    Thanks

    Ash

  • ds store Level 7 Level 7 (30,310 points)

    khenryashley wrote:

     

    Partition failed "couldn't unmount disk"

     

    Even if you did #2 on the whole drive you still get the "couldn't unmount disk"?

     

    And you are booted from Internet Recovery correct?

     

     

    Did you try using First Aid > Repair Disk on the entire drive? Try from #2 again, else continue below.

     

     

     

    Guess we will have to use Terminal then. Quit Disk Utility and under the menu is Terminal.

     

    type in each and press return:

     

    diskutil list

     

    Get the identifier for your boot drive say it's "disk0"

     

    diskutil unmount force disk0

     

    diskutil erase disk0

     

    diskutil mountDisk disk0

     

     

    Should be rather quick and painless.

     

    Next Quit Terminal and head back to Disk Utiltiy and click on the entire drive again and click Erase and move the slider one spot to the right (for Zero) and click Erase. Come back after a spell when it's finished.

     

    When finished head to Partition tab, then Partition Layout and click 1, then option: GUID and Format: OS X Extended Journaed and the name MacintoshHD and click Apply.

     

    Quit and install OS X using your AppleID and password.

     

     

    If this don't work, I don't know what will.

     

     

     

    Forgive me if this seems to be taking a lot of time, it's not like a Partition Map scheme gets screwed up often, in fact it's very rare as it only takes a tiny portion on the drive.

     

    If this doesn't work I hope you don't have to replace the drive.

  • khenryashley Level 1 Level 1 (20 points)

    Everything going well in terminal until message ownership of the affected disk is required.

     

    Thanks

  • ds store Level 7 Level 7 (30,310 points)

    khenryashley wrote:

     

    "message ownership of the affected disk is required."

     

     

     

    Getting there, after what Terminal command I gave you that this message appeared?

     

     

    These are the commands for ownership

     

     

    diskutil enableOwnership disk0

     

    diskutil disableOwnership disk0

     

     

     

    You can open a new Terminal window and enter

     

    man diskutil

     

    to see the list of commands.

     

    If you need to clear the Terminal screen

     

    clear

     

    At this point I'm experimenting

     

     

    If all you have to do is mount the drive, then you can simply reboot back into Internet Recovery and it will mount the drive in Disk Utility again.

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