Sync different copies of a filesystem

[N. Yaakov Ziskind]

I have 5 or 6 :-( different copies of a filesystem on various Linux
boxen, all backups taken at different times, with different exclusions,
and squirreled away. Now's the time to clean up my attic. I'd like to
merge them all into one big filesystem. When there are different copies
of the same files, I'd like to keep the newest; I don't know what else
to do. My plan (assuming I'm going to retain 'path0' as the surviving
filesystem) goes like this:

rsync -azPv -u path-to-system-1 path0
rsync -azPv -u path-to-system-2 path0
rsync -azPv -u path-to-system-3 path0
rsync -azPv -u path-to-system-4 path0
rsync -azPv -u path-to-system-5 path0

and then rm -rf "path-to-system-?", and hope for the best.

What kind of disaster can I look forward to with this approach, and is
there a better one?

Thanks!

-- 
_________________________________________
Nachman Yaakov Ziskind, FSPA, LLM       awacs at ziskind.us
Attorney and Counselor-at-Law           http://ziskind.us
Economic Group Pension Services         http://egps.com
Actuaries and Employee Benefit Consultants