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  1. #1

    Sawday's Avatar
    Member Since
    Nov 19, 2006
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    York, UK
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    Specs:
    iMac: 24" Aluminium, 2.8 GHz, 4Gb RAM. iPad2, iPad mini2, iPhone5s
    Time Machine has 'lost' backups
    I last accessed my time machine on the 19th May and successfully recovered a file that was created on 15th May. Later that day I switched my External Time machine disk off.

    Today, I've just gone into Time Machine (yes after turning my disk back on before you ask) and the latest backup is dated 4 May. I've checked the disk via Finder and sure enough there is nothing after 4 May even though TM ran normally between then and the 19th. This was vital as I've been working on a critical project.

    Anyone any ideas how TM has lost files? Incidentally, backups from April and March are still there.
    Experience teaches you to recognise a mistake when you make it again.

  2. #2

    cwa107's Avatar
    Member Since
    Dec 20, 2006
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    Lake Mary, Florida
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    26,904
    Specs:
    15" MBP, Core i7/2GHz, 8GB RAM, 480GB Crucial M500 SSD
    Any chance the external was switched off or unplugged without being ejected? Or perhaps was it removed without stopping the Time Machine backup process?

    Have you tried running Disk Utility on the external?

    If I were working on a critical project, I would probably leave the backup drive connected the entire time. This way, you'll be sure to capture all incremental changes.
    Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!

    https://youtu.be/KHZ8ek-6ccc

  3. #3

    McBie's Avatar
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    Apr 26, 2008
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    2013 MBA 13" - OS X 10.11
    What do the log files say ?

    If nothing suspicious, launch a new TM backup and watch the logs in real time, it might be that TM needs to do a rebuild of its database.

    Cheers ... McBie
    A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila.
    The bitterness of poor quality remains long after the sweetness of low price is forgotten.

  4. #4

    Sawday's Avatar
    Member Since
    Nov 19, 2006
    Location
    York, UK
    Posts
    1,283
    Specs:
    iMac: 24" Aluminium, 2.8 GHz, 4Gb RAM. iPad2, iPad mini2, iPhone5s
    Thanks cwa107 and McBie. Just to clarify the points raised. The project completed on the 19th and as I wasn't going to be doing anything other than surf the net I ejected the drive before turning off. Actually, thinking about it after ejecting the drive I didn't switch it off as today I just "reintroduced to the mac" (by pressing the encryption button - its a freecom hard drive pro).

    This pm ran Time machine manually and it's now showing that there is backup timed at 14:05 today so I'll leave it on auto and see what develops.

    Incidentally, mcBie, where do I find the log files?
    Experience teaches you to recognise a mistake when you make it again.

  5. #5

    McBie's Avatar
    Member Since
    Apr 26, 2008
    Location
    Belgium
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    2,776
    Specs:
    2013 MBA 13" - OS X 10.11
    Go to Applications/Utilities and launch Console.app

    Select " All messages " at the top of the left window pane
    IN the right window pane, the second column title says " Sender/PID "
    Watch for messages coming from (backupd) and see what they say.

    Have attached an indication of what you may be looking for.

    Cheers ... McBie
    Attached Images Attached Images
    A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila.
    The bitterness of poor quality remains long after the sweetness of low price is forgotten.

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