macosbackuprsyncfat32apfs

rsync - same size, content, owner, group, permissions, time - yet it wants to copy

rsync - same size, content, owner, group, permissions, time - yet it wants to copy

Using macOS Mojave. Using the default filesystem in the source dir (apfs per df?), FAT32 in the dest dir (msdos per df).

Run out of ideas.

Solution

  • Try adding --modify-window=1. From the rsync man page:

    --modify-window
          When  comparing  two  timestamps, rsync treats the timestamps as
          being equal if they differ by no  more  than  the  modify-window
          value.   This  is  normally  0 (for an exact match), but you may
          find it useful to set this to a larger value in some situations.
          In  particular,  when  transferring to or from an MS Windows FAT
          filesystem (which represents times with a 2-second  resolution),
          --modify-window=1 is useful (allowing times to differ by up to 1
          second).