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  1. #1

    Member Since
    Jan 19, 2009
    Unhappy how to get lost file if Time Machine merge dates?
    I observe a strange behaviour of Time Machine.

    Let x<y<z be three dates.

    I have a file before x and back up at x.
    I delete the file y and now it's z. However, I observe that for unknown reason (the backup disk is large enough) Time Machine merge x, y and z.

    I must go back the date x to find the file but I can't since I can find things only before x or after z.

    What happen to Time Machine????

  2. #2

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Texas, where else?
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    Not strange at all. It is exactly the way Time Machine behaves. From Apple's Time Machine feature page.

    Timing is everything.
    Every hour, every day, an incremental backup of your Mac is made automatically as long as your backup drive is attached to your Mac. Time Machine saves the hourly backups for the past 24 hours, daily backups for the past month, and weekly backups for everything older than a month. Only files created and then deleted before the next hourly backup will not be included in the long term. Put another way: You’re well covered.
    As you can see, the 'y' backups disappear at certain points in time.
    You would need phenomenal amounts of storage space to maintain hourly backups even for a year.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  3. #3

    Member Since
    Jan 19, 2009
    hmm... if i understand well, when i hope to save as backup a file "forever", the file must exists at least for one month? I thought I was "well" covered not in such sense...

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