split fusion drive

Discussion in 'iMac' started by macoramma, Mar 7, 2018.

  1. macoramma macrumors newbie

    Joined:
    Mar 7, 2018
    Location:
    Canada
    #1
    27"I -MAC with 3TB Fusion HD .HD and Fusion are split.Any advice on rejoining them, running High Sierra OS
     
  2. casperes1996 macrumors 68040

    casperes1996

    Joined:
    Jan 26, 2014
    Location:
    Horsens, Denmark
    #2
    Do you have a backup of all your data? Everything will have to be deleted to rejoin them.

    When you are ready, create a bootable macOS installer, or boot from Internet Recovery. In Disk Utility, you should see the drive in red, with a message asking if you want to join them again. If that's not the case, open the Terminal.
    The syntax is then thus

    diskutil coreStorage create nameYourThing drive1 drive2

    nameYourThing obviously is whatever you want it to be called, and drive1 and drive2 respectively are the disk identifiers for the SSD and HDD
     
  3. nambuccaheadsau macrumors 68000

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #3
    Problem may be if you opted to format the blade drive as APFS. APFS will not run on a Fusion so perhpas reformat the Blade back to HFS+ and do a re-install after backing up.
     
  4. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #4
    Questions:
    How is the iMac running right now?
    Good and smooth?
    Fast?
    No other problems?

    If so, I'd just "let it be".
    The SSD portion of the fusion drive will always "run at its best" as a "standalone" SSD.
    "Fuse" it back with the HDD, and it may begin to slow down on you.
     
  5. macoramma thread starter macrumors newbie

    Joined:
    Mar 7, 2018
    Location:
    Canada
    #5
    --- Post Merged, Mar 11, 2018 ---
    Thanks so much,took me awhile but achieved successful joining of the two drives.The App boot disc creator was very helpful in creating the boot disc.
     
  6. casperes1996 macrumors 68040

    casperes1996

    Joined:
    Jan 26, 2014
    Location:
    Horsens, Denmark
    #6

    Superb. Glad to have been of assistance
     

Share This Page

5 March 7, 2018