backing up several machines to one tape?

[Neal Feinberg <nealf@harlequin.com>]

   Date: Thu, 29 Apr 1993 17:21 -0400
   From: Barry Margolin <barmar@think.com>

       Date: Thu, 29 Apr 1993 15:56 EDT
       From: Hans Tallis <tallis@starbase.mitre.org>

       I have 3 symbolics machines (two ivories, one non-ivory); one of the ivories
       has an exabyte drive on it.  I'd like to back up all three LMFSes onto the
       exabyte.  Is there a simple way to do this (preferably without a lot of mouse
       action)? 

   Make sure that the machine with the tape drive has

	   Service: TAPE TCP RTAPE
	   Service: TAPE CHAOS RTAPE

It is best to leave out the CHAOS service entry.  You really never want to use
CHAOS, and sometimes when the machine is loaded, the client machine
will try CHAOS instead of TCP, thinking the tape server is unreachable
via TCP.  Chaos doesn't have the software end-to-end checksum that TCP
has, and you might find that extra checksum useful.  So just add TAPE
TCP RTAPE.

   in its namespace entry.  Then when the dumper asks where you want to
   dump to, specify "name:device", where "name" is the name of the machine
   with the tape drive, and "device" is the name of the Exabyte drive on
   that machine (I'm not sure how SCSI devices are named on Ivory systems).
   The machine running the dump will then connect to the tape server over
   the network.

						   barmar

You can use SCSI<n> for the "device" field, where <n> is the unit
number.  If you don't know what the SCSI unit number of the exabyte
is, use the :Show Machine Configuration command, specifying the host
to which the tape drive is physically connected.

I bet you really want to write some script which will automatically
dump all three LMFSii without any operator intervention.
Unfortunately, I don't know of any such batch facility.  Perhaps
someone else on SLUG has already hacked up something.  Failing that,
you could try to read the LMFS sources.  There is some good stuff in
there.