Cannot erase bootcamp partition

Discussion in 'Windows, Linux & Others on the Mac' started by vbedia, Jul 20, 2014.

  1. vbedia macrumors regular

    Jan 25, 2014
    I have a rMBP with 512GB. Half is running windows 8.1 the other half Mavericks.

    After some problems with the windows partition I decided to delete it. I didn't use the bootcamp remove option. However the partition still exits, not only is it taking up space from my internal hard drive but I can't access it now.

    I had previously backup everything. I have tried to format/erase the whole hard drive but every time I do I get the message "disk Erase failed with the error: couldn't unmount disk".

    Now after pressing the power button and the alt option key I see the windows partition and the recovery hd.

    I don't know what to do. I would appreciate any help.
  2. vbedia thread starter macrumors regular

    Jan 25, 2014
    I managed to fix the error by using an USB boot drive.

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