How to reset TimeMachine and start with a new HD

Discussion in 'macOS Sierra (10.12)' started by mindquest, Dec 6, 2018.

  1. mindquest macrumors regular

    Joined:
    Oct 25, 2009
    #1
    Running Sierra and I want to add a new hard drive for my TimeMachine backups. I don't care about my previous TM backups.

    How do I clear TimeMachine and start over fresh?
     
  2. CoastalOR macrumors 68020

    CoastalOR

    Joined:
    Jan 19, 2015
    Location:
    Oregon, USA
    #2
    Use the Time Machine Preferences to Add or Remove backup disks. Make sure your new hard drive is formatted HFS+ ( Mac OS Extended (journaled)) before trying to add it to Time Machine.
    https://support.apple.com/en-us/HT201250
     
  3. mindquest, Dec 7, 2018
    Last edited: Dec 7, 2018

    mindquest thread starter macrumors regular

    Joined:
    Oct 25, 2009
    #3
    So if I add a different backup disk from the one that is already selected will it wipe out all the backups records in TM and start fresh with the first backup on the new HD?

    Just want to make sure I am starting from scratch when I add the new HD.

    Thanks in advance for any assistance you can provide!
     
  4. CoastalOR macrumors 68020

    CoastalOR

    Joined:
    Jan 19, 2015
    Location:
    Oregon, USA
    #4
    When you Add the new disk to TM it will start to use the new disk and it will have to do a full backup to the new disk which will take awhile.

    TM will not delete all backups form the old TM disk. If you do not want to use the old TM disk then Remove is from the TM drive list. If you do not remove the old drive from the TM list, then TM will will continue to backup to the old drive (if it is attached to your Mac) and the new TM drive. If the old TM drive is not mounted, then eventually TM will start nagging you it has been unable backup to the old drive in x number of days if you do not remove it from the TM drive list.

    If you definitely do not want to save the TM backups on the old drive then you can erase it using Disk Utility and repurpose it for some other task. Though, I would recommend not erasing the old drive for awhile until you are sure the new TM drive is working properly.
     

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3 December 6, 2018