Time machine back up and MBA

Discussion in 'MacBook Air' started by jdshap, Sep 15, 2011.

  1. jdshap macrumors newbie

    Joined:
    Sep 10, 2011
    Location:
    Atlanta, GA
    #1
    New 13" MBA. Love it, but having trouble with my time machine back up to my 1 TB Le Cie external hard drive. The USB connection to the drive is too slow, making back up a problem. Thoughts?? Do they have drives with Thunderbolt connections? Appreciate the feedback.
     
  2. deeddawg macrumors 604

    Joined:
    Jun 14, 2010
    Location:
    US
    #2
    The only thunderbolt drives on the market so far are very expensive RAID arrays.

    Define "too slow"? How much data and how long is it estimating? I'm curious to see if it's on par with what's normal or if there's an issue making it abnormally slow.
     
  3. jdshap thread starter macrumors newbie

    Joined:
    Sep 10, 2011
    Location:
    Atlanta, GA
    #3
    The initial back up of 120gigs is taking over 24 hours. I have not been able to complete an initial backup because I travel with the MBA and have not allowed enough time.
     
  4. AlteMac macrumors regular

    AlteMac

    Joined:
    Jul 21, 2011
    Location:
    New York suburb
    #4
    24 hours is way too long. Even for the initial backup. Shouldn't be more than a couple of hours. I would take a look at the external drive and see what is happening. I'd go to TM preferences and remove the disk as the backup disk and then add it back in, then restart TM.
     
  5. xraydoc macrumors demi-god

    xraydoc

    Joined:
    Oct 9, 2005
    Location:
    192.168.1.1
    #5
    It's also possible that the time estimate is incorrect. Sometimes it will report a time way longer than it will actually take, but settle to a (more or less) accurate time once things are well underway.

    For example, I cloned 3.5TB of data from one of my RAIDs to another just last night. When I started the clone (via Disk Utility's 'restore' option) it said 7 days to complete. Yes, 7 days. When I came back about an hour and a half later, it said 11 hours. That was at 12:30 am. When I awoke at 6:30 am, it was completely finished, including the whole verification stage (where the whole 3.5TB of data is re-read for integrity).

    Let it start and run it over night. I bet it finishes far sooner.

    One last piece of advice. Make sure you've got a known-good USB cable. A crappy cable might drop you down to USB 1.1 speeds - which really could take 24 hours.

    If it really takes that long, there's something wrong with your target drive.
     
  6. deeddawg macrumors 604

    Joined:
    Jun 14, 2010
    Location:
    US
    #6
    Agreed 100%. Time Machine restore of 150GB to my Macbook Air (transferring stuff from my MBP13) took a couple hours, maybe 2.5 or so. Heck, doing the first TM backup over wifi from my Macbook Air to a NAS on my LAN took less than 10 hours to finish (let it run overnight).

    If 120GB takes more than three or four hours to a USB drive, than something is VERY wrong with the drive or cable.
     

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