Article 126689 of comp.os.vms:
Path: nntpd.lkg.dec.com!star.enet.dec.com!dunham
From: dunham@star.enet.dec.com (James F. Dunham)
Newsgroups: comp.os.vms
Subject: Re: AXP VMS 6.2 SCSI problems
Date: 9 Aug 1995 10:57:55 GMT
Organization: Digital Equipment Corporation -- OpenVMS Engineering
Lines: 32
Distribution: na
Message-ID: <40a4bj$cuj@nntpd.lkg.dec.com>
References: <408lds$b1m@mango.rsmas.miami.edu>
Reply-To: dunham@star.enet.dec.com
NNTP-Posting-Host: star.enet.dec.com


||| Jim Brown, jim@lime.rsmas.miami.edu
||| 
||| After upgrading an AXP VMS 6.1 system to AXP VMS 6.2 (a DEC 3000/400)
||| the system is logging errors on the various attached SCSI disks (some are
||| fatal errors such that the disk cannot be mounted -- 'invalid command').

OpenVMS V6.2 supplies an unsupported utility to return SCSI device information
that is used during device MOUNT time. The results of the following command
may indicate why you have some SCSI devices failing.

	$ MCR SYS$ETC:SCSI_INFO <device:>

Form many SCSI devices they will respond with a "CHECK CONDITION", for
a 10-byte MODE SENSE. In the request sense data returned, the device is suppose
to return (20/00) for (ASC/ASCQ) which is "invalid command operation code".

There is special code to handle other class of 10-byte MODE SENSE failure,
which may result in 1 to 11 errors posted against a device at MOUNT time, but
the device should MOUNT and operate successfully. These are classes of device
firmware failures, and the vendor of the SCSI device should be contacted to
ask if they have new firmware to address MODE_SENSE(10) support.

-Jim

--
+---------------------------+tm                 James F. Dunham
|   |   |   |   |   |   |   |     I / S / O     OpenVMS Development
| d | i | g | i | t | a | l |  (o) (o) (o) (o)  Digital Equipment Corporation
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+---------------------------+      SCSI-2       Nashua, NH 03062-2698
						dunham@star.enet.dec.com