Using dar for archives to optical discs

Hello,

As noted on my blog at
https://changelog.complete.org/archives/10500-recommendations-for-tools-for-backing-up-and-archiving-to-removable-media
, I am working on a project for archiving data to optical media.  The
data set to be archived is several TB, and the optical media is 100GB at
largest.  Beyond the initial archive, I also want to be able to easily
update the archived data set.

dar is one of the two tools I'm seriously considering for this.

I am envisioning a situation like this:

The initial full archive run will be split into dar slices, and will
cover many discs.

Future archive runs will likely be a differential against the full
archive.  (Maybe some incrementals against a differential as well.)

In any case, that much is clear enough.

Now, the question of restoration arises.  dar_manager can ingest these
archives (or isolated catalogs).  Is dar_manager slice-aware?  In other
words, can I get it to tell me, for a given restoration, "I will be
needing slices 5, 3, and 10 of backup A and slice 2 of backup B"?

One other question... when creating a differential backup, can dar
efficiently store a rename (noticing the inode number is the same but
now has a different name or is in a different directory), or will all
renames cause files to be stored anew?

Thanks!

- John