Can´t unmount original HD, after update to SSD

Discussion in 'iMac' started by Andre C., Oct 30, 2015.

  1. Andre C. macrumors newbie

    Joined:
    Oct 30, 2015
    #1
    Hello everyone.

    I hope you can give me a hand with a little issue I´m having.

    I have a late 2009 iMac 27" i7. I replaced the Superdrive with an 850 EVO SSD (boot drive). Everything is working great so far. Great speed improvement and I managed to keep my Superdrive in an external USB enclosure.

    I left my original HD in place, but would like to format it completely to store files, music, etc.

    Even though I´m booted from the SSD, I can´t seem to be able to unmount it and format it clean.

    Forcing the unmount in terminal doesn´t work either.

    I just want a clean, empty drive...

    Any ideas?..

    Thank you.
     
  2. fa8362, Oct 30, 2015
    Last edited: Oct 30, 2015

    fa8362 macrumors 65816

    Joined:
    Jul 7, 2008
    #2
    Hi,

    Perhaps I'm misunderstanding you ("unmount"), but why don't you just highlight the disc and erase it?
     
  3. Andre C. thread starter macrumors newbie

    Joined:
    Oct 30, 2015
    #3
    Hi fa8362

    I can´t do that because it has a Recovery Partition. This was the original boot volume of the iMac before the upgrade to an SSD. It can´t be unmounted.

    I actually managed to solve the issue by rebooting into the Recovery Partition and then using Disk Utility to format from there.

    Now I have my SSD (in place of the Superdrive) as the boot disk, and the original Macintosh HD as just an empty drive.

    I´m going to partition the drive so I have one partition as a backup to the SSD (via Carbon Copy Cloner), and the rest of the space to keep my files and music.

    Thanks
     

Share This Page