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folder sync results in dates that are off by 1-2 sec

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  • folder sync results in dates that are off by 1-2 sec

    3.3.13755 beta, folder mirror from ntfs hard drive to fat32 usb

    I noticed when setting tolerance to 0, thinking it was not necessary, that many dates were a bit off, right after a copy. Why wouldn't they be identical?

  • #2
    NTFS stores timestamps with sub-millisecond resolution. FAT32 stores timestamps with a 2 second resolution. When BC copies from NTFS to FAT the timestamp gets rounded, which is why they're different. The timestamp tolerance setting was created, and defaults to 2 seconds, for exactly this case.
    Zoë P Scooter Software


    • #3

      That's the accuracy of the fat32 file system, with a potential of up to 2seconds off. If you perform the copy using My Computer/Windows Explorer, you should see similar behavior.

      You can perform a content comparison scan (such as binary) in the Session Settings -> Comparison tab.
      Beyond Compare is a multi-platform utility that combines directory compare and file compare functions in one package. Use it to manage source code, keep directories in sync, compare program output, etc.

      By default, BC3 has a 2 second tolerance enabled to help ignore this behavior, but that can be disabled.
      Aaron P Scooter Software