For incremental backups, FreeBSD needs GNU tar to be installed. It shows up as "gtar", but we don't currently detect anything other than tar.
I'm not seeing immediately how to correct it, as just changing the has_incremental_tar function to test for both tar and gtar won't do anything useful (I guess it'll just make the incremental option show up--but won't actually make it work since it doesn't set the path to tar).
Status:
Closed (fixed)