Everhart, Glenn
From:	Eberhard Heuser-Hofmann [vaxinf@chclu.chemie.uni-konstanz.de]
Sent:	Friday, July 10, 1998 6:19 AM
To:	Info-VAX@Mvb.Saic.Com
Subject:	Info about who to disable tagged command queing
Hi,

As you know some scsi-drives won't work properly (no mount etc.). Sometimes
you can solve this problem by modifying the internal scsi-setup.

Here's a little cooking recepture. Be sure that you know what you're doing:

There are several programs that comes with OpenVMS/Alpha V7.1:

[VMS$COMMON.SYSHLP.UNSUPPORTED]
SCSI_INFO.EXE
SCSI_MODE.EXE

SCSI_INFO.EXE helps to get data from your scsi-device.
SCSI_MODE.EXE modifies data of your drive.

BTW: Where are the sources????????? Please, DEQ, could you publish them?

i.e. "mc []SCSI_INFO.EXE dkb500: sgi_disk.log" writes a log-file, you
should printout.

As Glenn Everhardt pointed out in a previous posting: tagged queueing
is being introduced since V7.1, but there are many OS (sgi,linux) that
have problems with this feature, because the implementation seems to
defer considerably.

To disabling of tagged queuing issue the following command:

mc []SCSI_MODE.EXE -page 0a -offset f 00 -devname dkb500: -devtype ibmdsas-3540
devname and devtype will be different.
Hope the parameter offset is ok in every case, you will see this in SCSI_INFO.EXE,
if in you 0a-page is a 01 at this place.

Any comments will be appreciated

Eberhard  
===============================================================================

Dr. Eberhard Heuser-Hofmann
Univ. Konstanz
Fakultaet fuer Chemie
Universitaets-Strasse 10
D-78464 Konstanz
Germany
Phone: +49-7531-88-2026, FAX: +49-7531-88-3139
email: vaxinf@chclu.chemie.uni-konstanz.de

===============================================================================