Well then it seems this little trivial test worked so I'm confused as to why the command line below fails to work p1744-1222bkksp1:/tmp robert$ gnutar cvf test.tar test test/ test/1 test/2 test/3 p1744-1222bkksp1:/tmp robert$ gnutar cvf test1.tar test -N ./test/now test/ test/4 test/now On Mar 4, 2006, at 11:08 AM, Robert Nicholson wrote: > I also looked at the darwin sources to tar and saw that it supports > a filename as in > > /usr/bin/gnutar -W -v -p -X /usr/local/bruconfig/gnuxpat -N /var/ > backup/BACKUP-0 -cf /Volumes/External/BRUBackups/annie/ > backup-20060304-3.tar / > > but this also results in a full backup. ie. it's not considering > only those files that are more recent than the mtime of BACKUP-0 > > On Mar 4, 2006, at 10:10 AM, Robert Nicholson wrote: > >> It's actually using the following. >> >>> >>> /usr/bin/gnutar -W -v -p -X /usr/local/bruconfig/gnuxpat -N >>> 20060303 -cf /Volumes/External/BRUBackups/annie/ >>> backup-20060304-3.tar / >>> >>> What's happening at the moment is that the above line is actually >>> doing a full backup. ie. it's not considering the dates at all. >> >