From:	CRDGW2::CRDGW2::MRGATE::"SMTP::CRVAX.SRI.COM::RELAY-INFO-VAX" 16-MAR-1992 08:38:25.46
To:	ARISIA::EVERHART
CC:	
Subj:	Re: VAXStation 4000/60 SCSI problem

From:	RELAY-INFO-VAX@CRVAX.SRI.COM@SMTP@CRDGW2
To:	Everhart@Arisia@MRGATE

Received:  by crdgw1.ge.com (5.57/GE 1.123)
	 id AA05383; Mon, 16 Mar 92 08:05:37 EST
Received: From UCBVAX.BERKELEY.EDU by CRVAX.SRI.COM with TCP; Mon, 16 MAR 92 04:59:39 PST
Received: by ucbvax.Berkeley.EDU (5.63/1.43)
	id AA06070; Mon, 16 Mar 92 04:42:32 -0800
Received: from USENET by ucbvax.Berkeley.EDU with netnews
	for info-vax@kl.sri.com (info-vax@kl.sri.com)
	(contact usenet@ucbvax.Berkeley.EDU if you have questions)
Date: 9 Mar 92 15:28:13 GMT
From: pa.dec.com!e2big.mko.dec.com!samuel.enet.dec.com!marra@decwrl.dec.com  (Dave Marra)
Organization: Digital Equipment Corporation
Subject: Re: VAXStation 4000/60 SCSI problem
Message-Id: <1992Mar9.152813.29287@e2big.mko.dec.com>
References: <1992Mar8.183844.5687@coe.montana.edu>
Sender: info-vax-request@kl.sri.com
To: info-vax@kl.sri.com

Jaye,

	The VAXstation 4000 series SCSI self tests tests for Logical 
Unit Numbers (LUN) on the SCSI bus.  Some venders mis-implement the 
SCSI LUN support on their hardware, which causes problems for the SCSI 
self test when it attempts to tell this LUN to do something, and, 
since there isn't really a LUN there, it fails.

	Something you might want to consider is changing your system 
disk to address six, and setting the scsi controler to seven 
(>>> SET SCSI 7).  This could help your problem some.  Also set the 
tape to zero.

	I've had problems with some of our scanners on these machines.  
Right now my SCSI bus is full, my system disk is as 6 and 4 
(I run host based shadowing to test it), with other disks 
at 5, 3, and 1.  I have two scanners hooked up to 2 and 0.

	Another thing to consider:  I believe that these machines 
are VERY SENSITIVE to the SCSI cable lenght of six meters.  You 
should count your cables up and verify that you are less than six 
meters.  Also, try NOT to run with any SCSI cables greater than 
two feet.  To help, you can order the mouse/keyboard extension 
cable, (BC13M-10) to get your system box away from you table-top.

	Hope this helps some...

						.dave.


--
+-----------------------------------------------------------------------------+
+ Dave Marra                            | TMF Engineering                     +
+ Software Validation Suites            | 37 Carlene Drive                    +
+ X Window System / Motif / VMS         | Nashua, NH 03062                    +
+-----------------------------------------------------------------------------+