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From: albrecht@muscat.UUCP (Mark Albrecht)
Newsgroups: comp.os.vms
Subject: Re: reading rt-11 tapes on vms-sumamry
Message-ID: <10560@muscat.UUCP>
Date: Wed, 29-Jul-87 20:51:36 EDT
Article-I.D.: muscat.10560
Posted: Wed Jul 29 20:51:36 1987
Date-Received: Sat, 1-Aug-87 01:06:19 EDT
References: <8707281302.AA02941@ucbvax.Berkeley.EDU>
Reply-To: albrecht@muscat.UUCP (Mark Albrecht)
Distribution: world
Organization: DEC Western Area Software Operations Group
Lines: 51

In article <8707281302.AA02941@ucbvax.Berkeley.EDU> FSIMMONS@UMNDUL.BITNET writes:
>
> This is a summary of the responses I received on this subject.
>
>  .... deleted responses ....
>
>
>Frank Simmons
>UMD Computing Services
>Univ of Minn,Duluth
>10 University Drive
>Duluth MN 55812
>ATT    : (218) 726-8849
>BITNET : FSIMMONS@UMNDUL
>CSNET  : FSIMMONS@UB.D.UMN.EDU
>SYSTEM : VAX/VMS 4.5  JNET 3.0

This is my first posting to the net (mail having not worked, as usual), so
bear with me...

As I recall there are different issues involved in reading/writing rt-11
readable 1/2" magtapes on a VMS system.  To go from rt-11 to VMS I have
used INIT and COPY on rt-11 to create a pseudo-ansi tape.  To read this 
on vms, one must use the command : $ MOUNT/NOHDR3/BLOCKS=512 etc.
There may still be problems, particularly if the rt-11 filename is
less than six characters (vms not liking embedded spaces in filenames), and
I think you will have to run CONVERT on any resulting ascii files to
place in stream-cr format from whatever the file ends up after the
copy from the tape ($ COPY used to copy the files from the tape, of
course!).

To create an rt-11 readable tape, your best bet is to use the EXCHANGE
facility to create an rt-11 virtual disk con the vax (used as a 
container file) and transfer that file on the tape.  Like this:

$ INIT MTA0: LABLE
$ MOUNT/NOHDR3/BLOCKS=512 MTA0: LABLE
$ EXCHANGE
EXCHANGE>INIT/CREATE DISK.DSK /ALLOC:300
EXCHANGE>MOUNT/VIRTU DSK: DISK
EXCHANGE>COPY WHAT.TXT DSK:
EXCHANGE>COPY DSK:WHAT.TXT WHAT.RT /TRANS=BLOCK
EXCHANGE>^Z
$ COPY WHAT.RT MTA0:

rt-11 should be able to read the tape!

Sorry if there are syntax errors, this is from memory.  Good luck!


Standard disclaimer: This is me talking, not Digital Equipment.