How to verify the integrity of a file? 1 of 2 files is corrupt

Discussion in 'Windows 7 Help and Support' started by pstein, Nov 11, 2015.

  1. pstein

    pstein Honorable Member

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    Assume I have a certain huge (> 2 GB) file and a second backup version of it on an external hard disk.

    Both have exactly the same size and dates.

    However when I compare them binary at the cmdprompt simplified with

    fc /b D:\myfile123.enc H:\myfile123.enc

    Then there are somewhere differences.
    I guess these differences could be because of a previous errorneous copy operation in the past (or defect DVD).

    Is there a way to find out which of them is corrupted and which is the valid file?

    Is there e.g. somewhere a CRC32 hash code in the Alternate Date Stream?
    Or in NTFS table?

    Or can I check occupied NTFS clusters just for this file (not whole hard disk)?

    Peter
     
  2. ussnorway

    ussnorway Windows Forum Team
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    In this senario no... if you had another (3rd) drive we could run a logic test.
     

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