On Fri, Oct 16, 2009 at 11:13:21PM +0200, Stevan Tiefert wrote: > Hello list, > > one example: If I have three partitions and I want to backup every day > these partitions, will I need 21 tapes? > > I ask because it seems it is not possible to place more than one dump on > one tape, isn't it?
You can easily put more than one dump on a tape if there is room enough for them. Check out the mt(1) command. Something like mt fsf 1 will skip over the first dump file so you can write the second. mt fsf 2 will skip over two files, etc. That is dump files, not files within the dump. Each dump of a filesystem is one file. If you need to restore, it is just the same. The first dump is the first file. The second dump is reached by skipping 1 file with the mt command, etc. I actually rewind and skip between each dump of multiples made to the same tape. I also use the no-rewind device for the tape. So first dump is: dump 0af /dev/nsa0 / For second dump: mt -f /dev/nsa0 rewind mt -f /dev/nsa0 fsf 1 dump 0af /dev/nsa0 /usr third mt -f /dev/nsa0 rewind mt -f /dev/nsa0 fsf 2 dump 0af /dev/nsa0 /var etc. when all done mt -f /dev/nsa0 rewind mt -f /dev/nsa0 offline I have this all in a script that also writes an index file as the first file on the tape. Of course if you are doing a change dump the dump command is going to look more like: dump 1af /dev/nsa0 etc. ////jerry > > With regards > Stevan Tiefert > > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org" _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"