pete@othello.dartmouth.edu (Pete Schmitt) (11/01/90)
I'm trying to do an rdump to a BSD4.3 system using the following command:
rdump 0sdf 2300 6250 sys:/dev/rmt8
The dump works fine until you get to the 2nd tape. It doesn't wait for
you to put on a new one and starts overwriting the first one. Has NeXT or
anyone have a fix for this?
--
Peter Schmitt UNIX/VMS Consultant
Kiewit Computation Center Computing Services
Dartmouth College (603)646-2085
Hanover, NH 03755 Peter.Schmitt@Dartmouth.EDUpvo@sapphire.OCE.ORST.EDU (Paul O'Neill) (11/01/90)
In article <25453@dartvax.Dartmouth.EDU> pete@othello.dartmouth.edu (Pete Schmitt) writes: >I'm trying to do an rdump to a BSD4.3 system using the following command: > >rdump 0sdf 2300 6250 sys:/dev/rmt8 > >The dump works fine until you get to the 2nd tape. It doesn't wait for >you to put on a new one and starts overwriting the first one. Has NeXT or >anyone have a fix for this? > Not a fix, but a workaround. I keep ours backed-up to a Sun-3/280 w/ 1/2" mag tape thusly: rdump 0udsf 2300 backup@server:/dev/nrmt8 /dev/rsd0a NB -- the no-rewind device rdump will not wait for a reply. It will continue the dump at the end of the tape, run past EOT and give an error message and ask "Do you want to restart?" (or somesuch). Answer "yes". Mount the new tape. Answer the "Is new tape mounted and ready?" (or somesuch) message with a "yes". The dump will continue. WHAT YOU WON'T DISCOVER UNTIL rrestore TIME: THE 2ND, 3RD, ETC. TAPES START WITH AN EMPTY FILE (an eof mark)! (rrestore says "not a dump tape", scared the hell out me the first time it happened.) When you go to restore from one of these multi-tape dumps, after you mount the 2nd, 3rd, etc. tape do a 'mt -f /dev/nrmt8 fsf 1' on the tape host to get past the empty file before you tell rrestore on the NeXT that the tape is mounted and ready. Also, after making the dump, you should doctor all but the last tape. They will NOT have an EOT mark before the physical EOT. This can drive tape utilities (tcopy, dd, whatever) bananas. Tape 1: load it mt -f /dev/nrmt8 fsf 1 mt -f /dev/nrmt8 eof unload it Tape 2, 3, ..., but not the last one: load it mt -f /dev/nrmt8 fsf 2 (once for the empty file, and once for the dump) mt -f /dev/nrmt8 eof unload it SUMMARY: All but the last tape run off physical EOT. All but the first tape start with an empty file. Good luck. Paul O'Neill pvo@oce.orst.edu DoD 000006 Coastal Imaging Lab OSU--Oceanography Corvallis, OR 97331 503-737-3251