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From: hamm@WAKS.RUTGERS.EDU.UUCP
Newsgroups: mod.computers.vax
Subject: Alternating Ultrix and VMS on a VAXstation 2000
Message-ID: <8702161639.AA16154@ucbvax.Berkeley.EDU>
Date: Mon, 16-Feb-87 10:03:00 EST
Article-I.D.: ucbvax.8702161639.AA16154
Posted: Mon Feb 16 10:03:00 1987
Date-Received: Tue, 17-Feb-87 05:46:39 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: "Greg Hamm" <hamm@waks.rutgers.edu>
Organization: The ARPA Internet
Lines: 35
Approved: info-vax@sri-kl.arpa


My query about running both Ultrix and VMS (alternately) on a single
Ethernetted VAXstation-2000 yielded an informative response from a DEC
person, which I summarize here:

1. It's possible.

2. The Ultrix V2.0 announcement did not [yet?] include support for network 
   disk services, so you'd have to install Ultrix-32 (no "m" anymore) on the 
   local disk.  Since there's no simple way to have Ultrix and VMS share 
   the same disk [n.b. : "at least, not at the present time"], VMS would 
   have to be booted over the network.

3. There might be some difficulty with the microcoded bootstrap procedure,
   since it is likely to want to boot Ultrix if it finds it. [? Is there
   no equivalent to an alternate or conversational bootstrap?]  An easy
   solution is to put Ultrix on a disk in an expansion box (where you
   could turn it off), and use the local RD32 as a paging/swapping/scratch
   disk for VMS.
   
4. If the VS2000 is to be part of a LAVc, the boot node has to run 
   VMS V4.5c, which won't be available from the SDC until a few months
   from now.

5. There may be support issues involved here, e.g., who has the error log
   with the information on a failing hardware component?  It was suggested
   that it would probably be easiest to buy the VS2000 with Ultrix, and
   then to buy the LAVc VMS license separately.


Greg

hamm@biovax.bitnet
hamm@waks.rutgers.edu
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