Network backup suggestions?

[Kian-Tat Lim]

	We have a 95% full 500 megabyte filesystem on our 4D/240 that
we would (very much) like to backup regularly.  The Iris only has a
cartridge tape drive, but another of our machines (running a fairly
standard 4.3 BSD) has a 6250 bpi 9 track.  The two machines are
connected by a lightly-loaded Ethernet.

1)	The filesystem is NFS mounted on the BSD machine.  We would
thus be able to use dump if we enabled root access to the remote
filesystem.  Are there any additional security holes we would
introduce by doing this?

2)	Is there a version of rdump available for the Iris (running
3.1F until application software catches up with the new release)?

3)	Is there any way to make bru to a pipe work properly over
multiple tapes?  It seems that if we specify an appropriate tape
size that bru will correctly split the archive, but the remote side of
the pipe will have difficulty discovering this and cannot communicate
end-of-tape messages back to bru to facilitate idiot-proofing.

4)	Any other suggestions?

--
Kian-Tat Lim (ktl at wagvax.caltech.edu, KTL @ CITCHEM.BITNET, GEnie: K.LIM1)