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From: thompson@PAN.SSEC.HONEYWELL.COM (John Thompson)
Newsgroups: comp.sys.apollo
Subject: re: Tar
Message-ID: <9104021515.AA11974@pan.ssec.honeywell.com>
Date: 2 Apr 91 15:15:36 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
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> While on the subject of "tar", is it possible to "tar" more than one archive to
> a cartridge tape? It seems a waste to use a 40 meg tape for a 20 meg archive. It would 
> be nice to put another archive at the tail end of the first (similar to rbak/wbak).
> I have tried all permutations of the available "tar" options with no success. Am
> I missing something here, or is what I am trying to do not possible?

DISCLAIMER:  I haven't tried this, so I can't vouch for it.

You should be able to use the non-rewinding tape devices (generally, 12 or 13 instead
of 8 or 9 (e.g. rct12, rmt12, rmts13).  Perform your first tar to this device, and
then just perform the second (and third and ...)

If you've already put tape-file-1 out, and want to append to that tape, you probably
need to use the /bin/mt (may not work with 8mm devices) command.  Read the man page
for info on it.  I don't know about full O/S support yet, but Apollo provided a
new_mt command with Omniback to support the new devices.  I expect that that will be
or has been incorporated in the O/S.

-- jt --
John Thompson
Honeywell, SSEC
Plymouth, MN  55441
thompson@pan.ssec.honeywell.com

Me?  Represent Honeywell?  You've GOT to be kidding!!!