"Mirror" with no deletes - i...

[rpnconsult]

I am using FFS to mirror a directory structure conatining images. Is is
possible to use FFS in a mode
where any new files added or modified are reflected in the "mirror" version,
but no files are ever deleted
from the mirror. I know this is not a true mirror but what I am trying to do
is use FFS as a backup/mirror,
where if a file is accidentally deleted from the source, it can be recovered
from the mirror.

Thanks in advance!

[Zenju]

This sounds pretty much like the "update" sync variant.