Can't Unmount HDD in main bay

Discussion in 'MacBook Pro' started by Balaamsdonkey, Sep 7, 2013.

  1. Balaamsdonkey macrumors 6502

    Joined:
    Jun 24, 2008
    Location:
    Washington
    #1
    Mid-2010 MacBook Pro

    I recently placed an SSD into my optical drive bay, and installed OSX to it. I've also made it my main startup drive. I've backed up the old 500GB drive, and done what I wanted to do application wise.

    Attempting to wipe the main HDD I am told that OS X can't unmount the drive. I've restarted Finder, as another thread suggested with a similar issue, to no avail.

    Does anyone know why the drive won't unmount? Is it because it is in the main drive bay?

    Thanks!
     
  2. 53kyle macrumors 65816

    53kyle

    Joined:
    Mar 27, 2012
    Location:
    Sebastopol, CA
    #2
    I think you are still booting from the old drive. Boot from your original install disks, erase your HD (make sure you erase the right one and that your ssd does have data on it), click utilities>startup disk, select your HD, and click restart.
     
  3. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #3
    What is shown in System Preferences > Startup Disk* as your Startup Disk and have you booted from it?
    [​IMG]
     
  4. Balaamsdonkey thread starter macrumors 6502

    Joined:
    Jun 24, 2008
    Location:
    Washington
    #4
    I wasn't. Or at least I'm pretty sure I wasn't. I figured out how to do it though. I had to boot w/ the Option key held down, and erase the drive from diskutility there.

    Thank you!
     
  5. gngan macrumors 68000

    gngan

    Joined:
    Jan 1, 2009
    Location:
    MacWorld
    #5
    That means that you were booting from the HDD that you want to unmount.
     

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