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From: craig@comp.lancs.ac.uk (Craig Wylie)
Newsgroups: net.followup
Subject: Re: FYI: VM systems on the net
Message-ID: <336@comp.lancs.ac.uk>
Date: Mon, 4-Aug-86 08:54:22 EDT
Article-I.D.: comp.336
Posted: Mon Aug  4 08:54:22 1986
Date-Received: Thu, 7-Aug-86 01:45:57 EDT
References: <455@valid.UUCP> <653@glasgow.glasgow.UUCP> <494@sunybcs.UUCP> <503@valid.UUCP> <281@fai.UUCP>
Reply-To: craig@comp.lancs.ac.uk (Craig Wylie)
Organization: Department of Computing at Lancaster University, UK.
Lines: 34

In article <503@valid.UUCP> gelfand@valid.UUCP (Brooks Gelfand) writes:

>No operating system, by itself, can imporve hardware reliability -
>[..] When the
>hardware crashes you will loose work in progress - the files in core.
>However, you should not have lost any files on disk unless you were 
>writing to them at the time of the crash. Or did you perhaps have a
>disk head crash?
>
>Brooks Gelfand
 

Just joining in, I have never lost a file on a VM system. However
when I was using VM I always thought that the file structure
placed on top of VM (be it cms or system V equivalent) determined
what happened, ie when superblock writes took place etc..

Back to the first posting in this series now, the poster 
asked that we bear in mind VM systems when writing sources.
OK, what do we have to remember, tell us about the differences
and similarities, what can you do on VM that you can't do in
UNIX (under something that is common to both, there is no point
saying that you can write EXEC2 (don't laugh  --  they designed it
a long time ago) or REXX. What is the difference between C on
VM and UNIX. Is there a C compiler for VM/CMS ....


Craig.
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