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Time Machine over a network

From http://imulus.com/blog/george/software/using-leopard-time-machine-to-backup-of-a-network/
  1. Open a terminal window and type
    defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1
  2. Mount the relevant volume using Finder
  3. The backup volume will now show up on Time Machine and can be used for a backup.

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