From owner-freebsd-scsi  Mon Sep  4 14:56:15 2000
Delivered-To: freebsd-scsi@freebsd.org
Received: from feral.com (feral.com [192.67.166.1])
	by hub.freebsd.org (Postfix) with ESMTP id B6F7737B422
	for <freebsd-scsi@FreeBSD.ORG>; Mon,  4 Sep 2000 14:56:12 -0700 (PDT)
Received: from zeppo.feral.com (IDENT:mjacob@zeppo [192.67.166.71])
	by feral.com (8.9.3/8.9.3) with ESMTP id OAA15854;
	Mon, 4 Sep 2000 14:55:59 -0700
Date: Mon, 4 Sep 2000 14:52:33 -0700 (PDT)
From: Matthew Jacob <mjacob@feral.com>
Reply-To: mjacob@feral.com
To: Eric Christeson <echriste@ssesco.com>
Cc: "'freebsd-scsi@freebsd.org'" <freebsd-scsi@FreeBSD.ORG>
Subject: Re: Problems with tape drive
In-Reply-To: <01C01658.1F36EBC0.echriste@ssesco.com>
Message-ID: <Pine.LNX.4.21.0009041447540.11417-100000@zeppo.feral.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-scsi@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org


> I've been having a problem with my tape drive and I have a solution, I just 
> don't know if it's the correct solution.  I'm running 4.1 stable and have a 
> drive that gets recognized as a Tandberg TDC 3800 (see dmesg output that 
> follows) with DC6525 tapes.  I have scsi and sa in the kernel and 
> everything set up correctly, but whenever I try to do anything with the 
> tape drive I get an error.
> 
> $ sudo mt status
> mt: /dev/nsa0: Invalid argument
> (sa0:sym0:0:5:0): unable to set fixed blocksize to 1024

Hmm?

> 
> I set some debug flags and did some digging through cam/scsi/scsi_sa.c and 
> found that the quirk entry for the Tandberg 3800 doesn't set SA_QUIRK_FIXED 
> or SA_QUIRK_VARIABLE so on line 1978 last_media_blksize gets set to 1024 
> which in turn causes it to try to set the device blocksize to 1024 around 
> line 2041.  I don't know if my drive or media is funky or what, but it 
> wants the blocksize to be 512 and only 512 (or variable).  I've gotten 
> around this by setting either SA_QUIRK_FIXED or SA_QUIRK_VARIABLE in the 
> Tandberg 3800 quirk entry.

Okay. Definite bug. Thanks. Good sleuthing. I believe that it
should be SA_QUIRK_FIXED. I keep gettting beat up on whenever I try
to make all QIC drives FIXED.

DC6525 has to be 512 bytes. That's a fixed thing (cough).

I'll clean it up and do the checkins. Thansk again.



> 
> 
> dmesg output:
> 
> Copyright (c) 1992-2000 The FreeBSD Project.
> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
>         The Regents of the University of California. All rights reserved.
> FreeBSD 4.1-STABLE #0: Thu Aug 31 15:06:00 CDT 2000
>     root@finch.koehntop.net:/usr/obj/usr/src/sys/FINCH
> Timecounter "i8254"  frequency 1193182 Hz
> CPU: Pentium Pro (179.63-MHz 686-class CPU)
>   Origin = "GenuineIntel"  Id = 0x619  Stepping = 9
> 
> snip...
> 
> sa0 at sym0 bus 0 target 5 lun 0
> sa0: <TANDBERG TDC 3800 =04:> Removable Sequential Access SCSI-2 device
> sa0: 3.300MB/s transfers
> 
> thanks
> eric
> 
> Eric J Christeson <echriste@ssesco.com>
> 
> 
> 
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-scsi" in the body of the message
> 



To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-scsi" in the body of the message