Weird "diskutil list" situation...

Discussion in 'OS X El Capitan (10.11)' started by vadrum, Feb 22, 2016.

  1. vadrum macrumors newbie

    Joined:
    Jan 14, 2015
    #1
    Hi guys!
    On my MBP I just upgraded to El Capitan with a fresh install, using an external USB key.
    On my drive there was only one partition with Snow Leopard. And I erased everything with Disk Utility included in the El Capitan installer.
    Now everything works, but typing "diskutil list", here's what I get. And it seems to be weird to me.
    There's an "internal, physical" and an "internal, virtual" drive. But I only have 1 SSD and I don't understand why there's this dual thing.
    My question is: what is that physical, virtual drive? How can I erase that?
    Here's what I see:
     

    Attached Files:

  2. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #3
    Totally normal and nothing to worry about. Just leave it be.

    If you install Yosemite or El Capitan on a Mac portable with a CPU that supports AES-NI, and there is no Bootcamp (Windows) partition present, the installer converts the drive into a "core storage" logical volume that you are seeing there.

    There are quit a few articles around about this such as the ones linked by JohnDS, but nobody is really quite sure why Apple did this. But it does not seem to harm anything.
     
  3. vadrum thread starter macrumors newbie

    Joined:
    Jan 14, 2015
    #4
    Guys,
    I'm still not convinced about that internal virtual drive on my MBP...

    Why? When I try to press the alt key on boot there's no recovery option, just the osx drive (but in my diskutil it is there, part of the disk0).

    Instead, on my Mac Pro with El Capitan there's no trace of that virtual drive and the recovery option works.
     
  4. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #5
    You can boot to your recovery system by restarting while holding Command-R

    I think it does not appear in the Option/Alt-boot screen because of the Core Storage configuration.
    You may have done an OS X update to get El Cap on your other Mac, and the core storage volume would probably not have set up when doing an upgrade - but your clean instal did that on your MBPro. Not really affecting anything for you, except that Option-boot doesn't make the recovery partition appear. Boot with Command-R to get the recovery system to boot.
     
  5. vadrum thread starter macrumors newbie

    Joined:
    Jan 14, 2015
    #6
    Thank you @DeltaMac I knew that but at this point why it doesn't show up with the option key? Don't you think that it is weird?
    --- Post Merged, Mar 29, 2016 ---
    @DeltaMac in both macs I did a fresh install from an USB key. In both macs before there was Snow Leopard (so no recovery partition at all) and everytime I erased everything and installed from scratch
     
  6. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #7
    Then, maybe the difference is the drive arrangement on your Macpro. Perhaps the core storage does not extend to your PCIe/SSD setup on that.
    At any rate, the difference should not cause you any difficulty - other than my lame attempt at a technical answer :D
     
  7. vadrum thread starter macrumors newbie

    Joined:
    Jan 14, 2015
    #8

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