What Disk Utility Shows for Fusion Drive

Discussion in 'Mac mini' started by StevenT42, Nov 2, 2012.

  1. macrumors 6502

    Joined:
    Jun 9, 2010
    #1
    I am copying my post from another thread, since this seems to be coming up.

    Disk Utility shows a single volume for the Fusion Drive, not the SSD and the HD. When highlighting the first Macintosh HD in the list, it shows Type: Logical Volume Group.

    [​IMG]

    When highlighting the second Macintosh HD in the list, it shows this:

    [​IMG]

    Using iStat Menu's Disk Activity, it shows that there are two separate disks:

    [​IMG]

    They would appear to be a Samsung 128GB SSD and a Hitachi 5400RPM HD.

    You CAN use USB 3.0 and FireWire 800 hard drives on the 2012 Mac mini (I am using them now), you just can't add them to the Fusion Drive logical volume.
     
  2. thread starter macrumors 6502

    Joined:
    Jun 9, 2010
    #2
    Here's what About This Mac shows about the two hard drives:

    [​IMG]
    [​IMG]
     
  3. macrumors regular

    Joined:
    Jul 17, 2011
    #3
    If you load up the recovery to reinstall mountain lion does it show the two different disks?
     
  4. macrumors 6502

    MatthewAMEL

    Joined:
    Oct 23, 2007
    Location:
    Orlando, FL
    #4
    There is no Recovery Partition on my DIY MBP Fusion Drive. I would be interested to hear if the factory install has one.
     
  5. thread starter macrumors 6502

    Joined:
    Jun 9, 2010
    #5
    There is a recovery partition in Disk Utility during recovery mode, but it does not distinguish between SSD or HD:

    [​IMG]
     
  6. macrumors 65816

    Joined:
    Sep 10, 2007
    Location:
    Southern California
    #6
    so I may be confused. Is the fusion truly 2 physical drives or is it like a hybrid SSD drive?
     
  7. macrumors 6502a

    Joined:
    Jan 23, 2010
    Location:
    San Diego, CA USA
    #7
    It's two physical drives.
     
  8. thread starter macrumors 6502

    Joined:
    Jun 9, 2010
    #8
    The Fusion Drive is two physical drives, but the OS treats them as a single, logical drive.
     
  9. macrumors newbie

    Joined:
    Mar 10, 2011
    #9
    Can somebody run blackmagic test on it ?
     
  10. thread starter macrumors 6502

    Joined:
    Jun 9, 2010
    #10
    Already posted in another Fusion Drive thread, but I'll repeat it:

    Black Magic Disk Speed Test:

    2011 MacBook Air 256gig SSD: 242.0 MB/s write, 258.8 MB/s read (this is a Samsung drive.)
    2012 Mac mini, 1TB Fusion Drive: 284.6 MB/s write, 441.8 MB/s read
     
  11. hfg
    macrumors 68030

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #11
    What version of OS X came on the Fusion equipped Mac Mini?

    Thanks for posting all this good information... :)



    -howard
     
  12. thread starter macrumors 6502

    Joined:
    Jun 9, 2010
    #12
    os x 10.8.2 (12c2034)
     

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