--super receiver attempts super-user activities
--fake-super store/recover privileged attrs using xattrs
-S, --sparse handle sparse files efficiently
+ --preallocate allocate dest files before writing
-n, --dry-run perform a trial run with no changes made
-W, --whole-file copy files whole (w/o delta-xfer algorithm)
-x, --one-file-system don't cross filesystem boundaries
up less space on the destination. Conflicts with bf(--inplace) because it's
not possible to overwrite data in a sparse fashion.
+dit(bf(--preallocate)) This tells the receiver to allocate each destination
+file to its eventual size before writing data to the file. Rsync will only use
+the real filesystem-level preallocation support provided by Linux's
+bf(fallocate)(2) system call or Cygwin's bf(posix_fallocate)(3), not the slow
+glibc implementation that writes a zero byte into each block.
+
+Without this option, larger files may not be entirely contiguous on the
+filesystem, but with this option rsync will probably copy more slowly. If the
+destination is not an extent-supporting filesystem (such as ext4, xfs, NTFS,
+etc.), this option may have no positive effect at all.
+
dit(bf(-n, --dry-run)) This makes rsync perform a trial run that doesn't
make any changes (and produces mostly the same output as a real run). It
is most commonly used in combination with the bf(-v, --verbose) and/or