Hi,
> I’m not looking to identify all duplicates. I want to know what unique data
> might be on a disk labeled “backup"…. To determine this the software (rsync?)
> must query an index of ALL specified drives where the original pathname may
> be very different for each an every file. Can rsync perform the equivalent of
> a Finder query for each and every file on the source drive (the drive labeled
> “Backup”)? The goal is to not recycle a disk unless it is confirmed that all
> files are represented elsewhere. Does that clear things up? I’m not aware of
> any utility that offers this feature.
rsync is very efficient at replicating a directory to another one (in an
optimal differential way).
rsync is great. There are tons of options, it can run as a
deamon/service/server.
It has been created by the guy who wrote samba (basically reversed engineered
the Microsoft SMB protocol).
It works from :
- local dir to local dir
- rsync server to local dir
- local dir to rsync server
rsync will not check for duplicates within a directory.
You can contact me privately if you need help on rsync. I use it a lot (and I
love it).
Thinking outside of the box ZFS is a filesystem which handles compression,
encryption and deduplication. There are some NAS that are using ZFS : freenas
for instance...
HTH
Bruno
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