Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!tut.cis.ohio-state.edu!att!laidbak!obdient!simon!steve
From: steve@simon.UUCP (Steven E. Piette)
Newsgroups: comp.sys.apollo
Subject: Re: Apollo-Sun cartridge tape reading thru tar?
Summary: Here's how to make tar tapes
Keywords: sun, apollo, tar, cartridge tape
Message-ID: <339@simon.UUCP>
Date: 19 Jun 89 02:21:16 GMT
References: <1559@cod.nosc.mil>
Distribution: usa
Organization: ACT, Inc., Dank Dark Cave, Algonquin, IL.
Lines: 55

In article <1559@cod.nosc.mil>, cynthia@cod.NOSC.MIL (Cynthia G. Anderson) writes:
> 	question 1: for the apollo folks--
> 		I'm trying to get the tar command to read a
> 		cartridge tape of mine.  the tape was made using
> 		wbak and has a single file on it.

As mentioned by another poster; tar and rbak/wbak are incompatible.

> 	question 2: for both apollo and sun people--
> 		I want to be able to write a cartridge tape
> 		so that either the a sun-3 or 4 OR an apollo
> 		DN 3010 can read it.

First, the procedure varies withg the version of system software your using 
on the Apollo's. SR9 versions are more limiting than SR10 versions. Second,
please note that prior to the SR10 version of tar objects written to and later
restored to tape using tar will lose their file typing information, in many
cases making tar a poor choise for archiving. (Also WBAK and RBAK are much 
faster than TAR on an Apollo machine).

So, How To information:

Under SR9 and earler, you must use a blocking factor of 1 on the non-Apollo
machines. From a Sun system use (Asumming your Sun has a 1.8 or later EPROM
allowing QIC24 tape support. Call 1-800-USA-4SUN for free EPROM upgrade):

	mt -f /dev/rst8 -rewind		# just to make sure your at BOT
	tar cfb /dev/rst8 1 files_to_backup	# st8 is QIC24 format

To read them into the Apollo:

	rbak -dev ct -rewind	# just to make sure your at BOT
	tar cf /dev/rctX files_to_backup	# replace X with approp number

SR10 or later supports blocking factors. You can also use the option to include
type information (recomended - you never know when this may be the only tape
left with your stuff on it). On non-Apollo systems this creates 0 length files
you can delete afterword that the Apollo saves the type info into.

I have used this procedure to move data from XENIX and Sun's to/from Apollo's.
Beware there are problems with SGI's (byteswapping) and HP's (incompatable
tape formats) when using cartridge tapes.

> 
> 	cynthia anderson
> 	cynthia@cod.nosc.mil
> 	Naval Oceans Systems Center

I hope this helps.

-- 
Steven E. Piette                              Applied Computer Technology Inc.
UUCP: {smarthost}!simon!steve                             1750 Riverwood Drive
INET: steve@simon.CHI.IL.US or spiette@SUN.COM             Algonquin, IL 60102
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