RISC Ultrix 3.1 NFS bug(?)

[Michael Meissner]

In article <25E5B8AD.23477 at orion.oac.uci.edu>
iglesias at orion.oac.uci.edu (Mike Iglesias) writes:

| We just found out that there is a known Sun NFS bug (ref # 1014577)
| for SunOS 4.0.  Here's the info we have:
| 
| 
| Synopsis: NFS mounted files occasionally get garbage/nulls written to them.
| 
| Description:
| Occasionally when writing to NFS mounted files, parts of a file are replaced
| exactly (no insertions or deletions) with garbage, usually nulls.  This can 
| span several appens to the file by distinct processes running minutes apart.
| 
| 
| Does that sound like the problem you're having?  We've seen the results
| of this bug, but have no idea (until now) how to cause it.

When I was at Data General, we had the same problem with SunOS 3.5
that we were using to bootstrap the AViiON software.  Our network
people discovered sun was not turning on checksumming on the NFS UDP
packets.  We kludged around it, by taking the NFS source for the
module which opens the socket, and turning on checksumming, and
rebuilding the kernel with this module.  I would hope that Ultrix
turns on checksumming, but you never know....
--
Michael Meissner	email: meissner at osf.org		phone: 617-621-8861
Open Software Foundation, 11 Cambridge Center, Cambridge, MA

Catproof is an oxymoron, Childproof is nearly so