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Thread: Ext3 Journal

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  1. #11
    Linux Guru Lakshmipathi's Avatar
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    About structure of ext file system
    Design and Implementation of the Second Extended Filesystem

    If you want unreliable guide then check out this :
    SourceForge.net: giis docs
    First they ignore you,Then they laugh at you,Then they fight with you,Then you win. - M.K.Gandhi
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  2. #12

    Smile A vote of THANKS

    dear sir

    thank you very much for kind help & nature as well

    i'll definately go through the link which u have sent
    to me

    with best regards

    Amit

  3. #13
    Sorry for reviving an aincient thread, but this is the top google hit for the question and I have been searching around for ages until coming up with the answer.

    Quote Originally Posted by mohit.saha View Post
    Now the 2nd question: How to interpret the journal dump?
    The journal dump itself does not seem to be very informative, what you can do is limit it's scope by providing it with an inode number:
    Code:
    # debugfs /dev/whatever -R "logdump -i <inodenumberhere>"
    Which will somehow magically provide you with more detail, containing the backlog of file metadata changes you can use to reconstruct what was happening with the file. Please keep in mind that the journal resets on every rw mount (effectivelly, every boot) and tends to wrap around in a destructive sort of way if it runs out.

    LP,
    Jure

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