I've been doing backups with listed-incremental for many years. When I try to upgrade from a tar with dump format 0 (version 1.15.1) to format 2 (version 1.17, Fedora 8 packaging) it tries to do a complete backup.
Simple example to illustrate: 22:55 mimmi> mkdir tmp 22:55 mimmi> touch tmp/apa 22:55 mimmi> tar-1.15.1 --create --listed-incremental=#list --file=#.tar --verbose tmp tmp/ tmp/apa 22:55 mimmi> tar --create --listed-incremental=#list --file=#.tar --verbose tmp tmp/ tmp/apa Format 2 has more data than format 0. I guess newer tar makes some conservative assumptions about the state at the time of the previous backup which makes everything seem new. Is this kind of migration not intended to work, or is it a bug? Tar 1.17 reads format 0 as documented. But I'm not sure what the point with that is if it anyway behaves as if it started from scratch.
