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From: tyler@gen1.UUCP (Tyler IVANCO)
Newsgroups: comp.os.misc,comp.sys.m68k,comp.sys.nsc.32k,comp.sys.intel,comp.sys.att,comp.unix.questions
Subject: Information on a real time data logging system
Message-ID: <310@gen1.UUCP>
Date: Wed, 23-Sep-87 16:00:04 EDT
Article-I.D.: gen1.310
Posted: Wed Sep 23 16:00:04 1987
Date-Received: Fri, 25-Sep-87 05:46:01 EDT
Organization: gen1 - York University, Petrie Bldg, Downsview, Ontario CANADA
Lines: 43
Xref: mnetor comp.os.misc:215 comp.sys.m68k:571 comp.sys.nsc.32k:273 comp.sys.intel:357 comp.sys.att:1290 comp.unix.questions:4224


	We are currently looking into the integration and possible design
of a real-time laboratory data logging computer system.  It should possess 
the following possibly contradictory characteristics:

	1) Inexpensive (isn't that always the case :-)

	2) Multitasking operating system.

	3) Capable of real time data aquisition given 
 	   that enough real memory for all of the processes exists and that
	   sufficient CPU power is available.  What makes an operating system
	   capable of real time operation?   Is UNIX capable of this?  
	   Is BSD superior to Sys V in this respect?  Are their any other
	   operating systems that might be better suited to this task?
	   OS/9 is said to be a real time system; why? 

	4) Popular bus such as the AT, multibus I or VME bus.  

	5) A *REAL* 32 bit processor (e.g. NSC32xxx, MC68020, i80386).

	6) A hardened mass storage device that would survive the rigors of
	   field use ranging from the arctic to desert conditions.  We are
	   concerned about thermal shock, water condensation and so on.
	   The machine will operate under normal temperature conditions.
	   What types of mass storage devices are available that can met 
	   these requirements?  We are interested in the names of vendors 
	   that may sell such products.  This includes hard drives, bubble
	   memory, battery backed up RAM, WORM drives.

	Has anyone already designed such a system?

	Please e-mail any responses to this query and perhaps the addresses
and phone numbers of organisations that have attempted such a design.

						Tyler Ivanco, Brian Solheim,
				Institute for Space and Terrestrial Science,
					Solar and Terrestrial Physics Lab

-- 
Phone: (416)736-2100 x7765                            Tyler Ivanco
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