#source_subdir# rsync -vaH --delete-delay --partial --stats --numeric-ids --inplace --archive
--compress --fileflags --hard-links --one-file-system [--bwlimit=2000 ] . ( == heredot==source)
That one, if it works better than the rsync one is currently using, and run for each filesystem shown by "df", has worked famously here several years so far... the bwlimit limits speed (a full rsync may run at 9000) to
enable the system to normally operate, if one is browsing, running a server, etc...; and runs an
incremental backup if the second, third time etc. (One might run a partial test of the full rsync command
from a deeper subdirectory in the source if modifying the /[destination] target accordingly).