Time Machine and Switching Main Drive

Discussion in 'Mac OS X Lion (10.7)' started by DockMac, Nov 14, 2011.

  1. DockMac macrumors regular

    Dec 22, 2008
    I had two notebooks and swapped their HD's. My external Time Machine Backup does not recognize the old drive, in the new notebook as it's place to "backup". How do I force Time Machine to make the Backup on the external drive, without starting an entirely new backup?
  2. johnhurley macrumors 6502a


    Aug 29, 2011
    Dunno about forcing it ... sorry.

    Any reason why starting an entirely new backup ( aka by erasing that partition and then pointing time machine to it ) is such a bad idea?

    I like to start over periodically to make sure I have a fresh new complete backup.
  3. DockMac thread starter macrumors regular

    Dec 22, 2008
    Unfortunately, I have other computers backed up to the same external, so wiping it clean isn't really an option. The other reason is that the drive is nearly at capacity, and I rely on Time Machine just to delete the oldest backup to write new data.

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