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Power Nap Doesn't Backup To USB Drive

Discussion in 'OS X Mountain Lion (10.8)' started by VacTacks11, Aug 5, 2012.

  1. macrumors member

    #1
    I use a USB drive attached to my Airport Extreme as my Time Machine. I use a program called Time Machine Editor to set my backups to 3am daily (I don't really need every hour).

    I'm finding that my backups aren't happening at 3am when I put my rMBP to sleep. The backups fire right up when I wake it from sleep.

    The USB drive is first mounted, then unmounted when the backup is finished. Is this normal behavior?
     
  2. macrumors 6502a

    #2
    USB devices are unmounted when you put OS X to sleep I believe.
     
  3. macrumors 6502a

    #3
    I was trying to use a USB connected drive as my time machine backup and I have also found that whilst in power nap it doesn't back up either...

    As soon as I start the air up, off it goes.
     
  4. macrumors 6502a

    #4
    I thought that the PowerNap backup was designed to be performed on the SSD as a local time machine backup.

    Because of silent operation and speed.

    Apple wanted to keep the wakeup time low, so a periodic local backup to the internal ssd was their idea of a nice marketing feature.
     
  5. macrumors 6502a

    #5
  6. macrumors 6502a

    #6
    afaik it doesnt use the normal backup schedule for power nap backups. it just checks if a backup is needed after sleeping 1 hour and then starts it.
     
  7. macrumors 68040

    Badrottie

    #7
  8. macrumors 6502

    #8
    Power Nap will not power on a USB drive. It will back up over wifi to a time capsule. But it's not going to power on and back up to a USB drive that gets its power from the Mac you are backing up.
     

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