Date: Sat,  6 Feb 88 13:17:58 EST
From: Dwight D. McKay (The Moderator) <Suns-at-Home@ea.ecn.purdue.edu>
Reply-To: Suns-at-Home@mckay.UUCP
Subject: Suns-at-Home Digest V1 #3
To: Suns-at-Home-List


Suns-at-Home Digest         Sat,  6 Feb 88       Volume 1 : Issue   3 

Today's Topics:
                               (rumors)
                         NFS over phone lines

+----------------------------------------------------------------------------+
| Suns-at-Home is published at least monthly.  Submissions should be sent to |
| Suns-at-Home@ea.ecn.purdue.edu or ...ihnp4!pur-ee!mckay!Suns-at-Home       |
+----------------------------------------------------------------------------+
----------------------------------------------------------------------

Date: Thu, 4 Feb 88 02:44:38 EST
From: pur-ee!bu-it.bu.edu!bzs%bu-cs.bu.edu (Barry Shein)
Subject: (rumors)
To: Suns-at-Home@ea.ecn.purdue.edu

The cover of this past week's MacWeek* shows a "triad strategy" of
Sun's which involves the 68030, SPARC and a 386. The article explains
that Sun plans to provide Sun/OS on all these machines (essentially,
two of them already exist.) I suspect that this 386 may be the Sun for
the Sundeck (home.) Seems like the only reason to do this is to provide
a packaged system (eg. disk, screen, etc) at a very low price.

More rumors?

	-Barry Shein, Boston University

* I provide the reference because I am non-disclosed with Sun (who
isn't? :-) and they may not remember that they never said a word to me
about any 386 system. In fact, I heard of it a year ago thru private
(ahem) sources and everyone since has denied it, last time *I* pay for
dinner...

------------------------------

Date: Sat, 30 Jan 88 02:21:53 EST
From: pur-ee!westend.columbia.edu!dupuy (Alexander Dupuy)
Subject: NFS over phone lines
To: suns-at-home

An important thing to be aware of if you plan to mount NFS filesystems over
phone lines running slip: as shipped by Sun, UDP checksums are turned off in
the kernel.  While this generally doesn't cause problems on Ethernet, where the
link layer CRC keeps the error rate low, this may not be true for other link
layer protocols or media.  In any case, it's generally a good idea to provide
end-to-end error detection, especially as the number of intermediate systems
and protocols increase.

You can turn UDP checksumming back on by initializing the kernel variable
udpcksum to 1.  This can be done with adb; be sure to patch it in both /vmunix
and /sys/OBJ/udp_usrreq.o.

[This subject has been discussed in some detail in comp.protocols.tcp-ip; you
might want to look at the archives].

@alex
---
arpanet: dupuy@columbia.edu
uucp:	...!rutgers!columbia!dupuy

------------------------------

End of Suns-at-Home Digest
******************************