1 2 3 Previous Next 33 Replies Latest reply: Jul 11, 2012 7:24 AM by RedSquirrelsNut Go to original post
  • 30. Re: TM keeps creating new backups and erasing my old backup data!!!
    Pondini Level 8 Level 8 (38,720 points)

    Jon Ruiz wrote:

     

    I too am having this same issue. I have a LaCie hard drive hooked up to an Airport Extreme Base Station.

    While that configuration does work, to some degree, for some folks, it is often unreliable and is not supported by Apple.  See  Using Time Machine with an Airport Extreme Air Disk.


    As noted there, the backups tend to get corrupted, and either TM says it can't back up, or you get the message that it has to start over, or, in extremis, you need them but they're unreadable. 

     

    In my case, it will usually be fine for several months before corruption occurs, but other times it happens after a couple of weeks. 

     

    But I've never had a problem backing-up to a directly-connected USB or F/W drive (since the early days of Leopard).  The problem is the Airport Extreme, not Time Machine or the HD.

  • 31. Re: TM keeps creating new backups and erasing my old backup data!!!
    Jon Ruiz Level 1 Level 1 (0 points)

    Thanks, I appreciate the definitive answer. Although not your fault, it's unintuituve that this doesn't work: a hard rive that is "time machine compatible" hooked up to an apple product and shows the disk in the time machine system prefs doesn't work.

     

    I'm impressed you found the Support article - it reminds me of the part in Hithhiker's Guide to the Galaxy where the construction foreman tells Arthur Dent that the plans to destroy his house have been on display for months and Arthur explains "Oh, yes. It was on display in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign outside the door saying "Beware of the Leopard." Ever thought of going into advertising?"

     

    But again, thanks for Ponpointing the problem for me.

  • 32. Re: TM keeps creating new backups and erasing my old backup data!!!
    Pondini Level 8 Level 8 (38,720 points)

    Jon Ruiz wrote:

     

    Thanks, I appreciate the definitive answer. Although not your fault, it's unintuituve that this doesn't work: a hard rive that is "time machine compatible" hooked up to an apple product and shows the disk in the time machine system prefs doesn't work.

    Not entirely. 

     

    Most of Apple's support articles and the Time Machine Tutorial, talk about backing-up to external HDs and Time Capsules in some detail, with no mention about other setups.  


    But many of us have asked Apple many times to be more clear about it, to no avail.  Don't hesitate to add your comments here: http://www.apple.com/feedback/timemachine.html

     

     

    I'm impressed you found the Support article

    No, it's not that well hidden.  It's actually in the Help on your Mac (although not all that easily found):

     

    Disks you can use with Time Machine.png

  • 33. Re: TM keeps creating new backups and erasing my old backup data!!!
    RedSquirrelsNut Level 1 Level 1 (0 points)

    This is very interesting. I've had my MacBook Pro running Snow Leopard since January 2011 and Time Machine has never worked properly. TM arbitrarily decided to stop incrementing and start adding brand new backups to the sparsebundle until the 1Tb TC was full. I'd have to delete the sparsebundle and begin again. We tried erasing the TC completely with no improvement. We tried verifying and rebuilding permissions, and a soft reinstall of Snow Leopard, no change.

     

    I was finally advised by Applecare to drag and drop my data files to the TC as a backup, and get my MacBook Pro disk wiped and reinstalled with Lion, which I did last week. I made a backup of the clean install and copied it to our NAS. The data files have now been copied back, and TM restarted and by day 2, I got the "to improve reliability Time Machine must create a new backup for you" message, and bingo, I'm back to square 1 again - no reliable backup.

     

    The most irritating part is that my husband's (mostly wireless) backups from his elderly MacBook running Leopard onto the same TC have been working perfectly since 2009. I have a new MacBook Pro, using a Cat 6 ethernet cable on a 1Gb network, running a fresh install of Lion and it doesn't work. The hours I've wasted on this.

     

    Pondini - thank you for your articles. I've bookmarked them and will work my way through to see if there's anything I've missed. I'm starting to suspect everything from the concrete walls to interference from the Sky receiver, the electric kettle or passing aircraft 30,000 feet up...

1 2 3 Previous Next