What is the lingering danger of Time Machine and APFS?

Discussion in 'macOS High Sierra (10.13)' started by eicca, Jun 4, 2018.

  1. eicca macrumors 6502

    eicca

    Joined:
    Oct 23, 2014
    #1
    I still haven't upgraded to 10.13 because I've heard something happens to Time Machine drives.

    My Time Machine drive is a 500GB HDD, old-fashioned platter style. Is it that APFS doesn't work on HDDs and 10.13 Time Machine can only read from APFS, or what's up? What am I missing?
     
  2. aliensporebomb macrumors 68000

    aliensporebomb

    Joined:
    Jun 19, 2005
    Location:
    Minneapolis, MN, USA, Urth
    #2
    I heard similar things but my Mac is running a fusion drive. I wasn't sure it was switching those to APFS at all due to the problems of dealing with drives that are different types like that.
     
  3. techwarrior macrumors 65816

    techwarrior

    Joined:
    Jul 30, 2009
    Location:
    Colorado
    #3
    TM drives cannot be APFS, even if they are external SSD. There are numerous posts about issues with TM running on APFS formatted drives. Currently, only internal SSD are supported for APFS.

    When you upgrade, if your internal boot drive is SSD, it will convert. All other drives, including external drives, internal HDD and Fusion will all be left alone.

    APFS can be used to format external drives using Disk Utility, but there really is little to be gained by doing this.

    I suspect that eventually, all drives will be supported with APFS.
     
  4. eicca thread starter macrumors 6502

    eicca

    Joined:
    Oct 23, 2014
    #4
    Guess I’ll back it up, and if the upgrade goes south, downgrade back to Sierra before trying to restore from Time Machine.
     
  5. eicca thread starter macrumors 6502

    eicca

    Joined:
    Oct 23, 2014
    #5
    Well it upgraded without a hitch. Seems to be running a bit smoother too.
     

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