Path: utzoo!mnetor!uunet!husc6!bloom-beacon!gatech!udel!princeton!rutgers!iuvax!pur-ee!uiucdcs!uxc.cso.uiuc.edu!sandrock
From: sandrock@uxc.cso.uiuc.edu
Newsgroups: comp.protocols.tcp-ip
Subject: Re: Checksums, CRC's, and NFS
Message-ID: <171500011@uxc.cso.uiuc.edu>
Date: 8 Apr 88 17:58:00 GMT
References: <1108@infinet.UUCP>
Lines: 10
Nf-ID: #R:infinet.UUCP:1108:uxc.cso.uiuc.edu:171500011:000:539
Nf-From: uxc.cso.uiuc.edu!sandrock    Apr  8 11:58:00 1988


RMS (Record Management Services) on VMS does a CRC on the entire file
both before and after it is transfered. We found this out the hard way
when we had a flakey UNIBUS adapter in our VAX/780 which caused most
large DECnet file transfers out our DEUNA to fail with the message that
the DAP level CRC check had failed. (DAP = Data Access Protocol). Would
have had a lot of bad data around without this check, since the network
itself was operating correctly and no other errors were ever reported.

Mark Sandrock, (sandrock@b.scs.uiuc.edu)