From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261660AbTK3WjM (ORCPT ); Sun, 30 Nov 2003 17:39:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261569AbTK3WjM (ORCPT ); Sun, 30 Nov 2003 17:39:12 -0500 Received: from maximus.kcore.de ([213.133.102.235]:55580 "EHLO maximus.kcore.de") by vger.kernel.org with ESMTP id S261660AbTK3Wi6 (ORCPT ); Sun, 30 Nov 2003 17:38:58 -0500 From: Oliver Feiler To: linux-kernel@vger.kernel.org Subject: Need help with diagnosing SCSI related (probably hardware?) problem (DC395 driver) Date: Sun, 30 Nov 2003 23:38:31 +0100 User-Agent: KMail/1.5 X-PGP-Key-Fingerprint: E9DD 32F1 FA8A 0945 6A74 07DE 3A98 9F65 561D 4FD2 X-PGP-Key: http://kiza.kcore.de/pgpkey X-Species: Snow Leopard X-Operating-System: Linux MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg=pgp-sha1; boundary="Boundary-02=_1Fny/2idILQu2U7"; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: <200311302338.45519.kiza@gmx.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --Boundary-02=_1Fny/2idILQu2U7 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Content-Description: signed data Content-Disposition: inline Hi, since I couple of days I have the following problem. Though I have no idea = how=20 to diagnose it and what is causing it. Maybe someone has a clue if I post i= t=20 here. My SCSI chain: Tekram DC395, using the driver from Kurt Garloff=20 (http://www.garloff.de/kurt/linux/dc395/) Attached is a TEAC CD-R56S4 CDR drive and Panasonic LF-D101 DVD-RAM drive. = I=20 use the DVD-RAM to backup stuff, usually 2 GB gets written to a medium as o= ne=20 file. Since a couple of days however the system just freezes during the backup. A= s=20 the drive LED of the CD burner blinks every minute or so I suspect Linux is= =20 trying to issue a SCSI reset, because something (presumable the DVD-RAM=20 drive) got stuck. This happens endlessly until I press the reset button. If the system is frozen, no keyboard input works, the screen is not updated= =20 anymore. You can ping the system, but not ssh into. There is no hard disk=20 activity and everything that tries to access the hard disk seems to get stu= ck=20 also. ssh'ing into the machine before starting the backup and using "tail -= f=20 /var/log/messages" doesn't give any output. After a reset when the SCSI controller BIOS inits it gets stuck when scanni= ng=20 ID2, which is the DVD-RAM drive. Only power cycling gets it to boot again. = So=20 I guess this device might be the problem. Though it's kinda annoying that t= he=20 kernel gets stuck in this endless reset loop (or whatever happens at that=20 time) needing to reset the box. Which also makes it practically impossible = to=20 debug this problem any further and definitely find out what the problem is. If anyone has further ideas I could try I'd be happy to hear about them. I= =20 only want to dump the drive if I can really be sure that it's broken. Thanks! :) Oliver =2D-=20 Oliver Feiler --Boundary-02=_1Fny/2idILQu2U7 Content-Type: application/pgp-signature Content-Description: signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) iD8DBQA/ynF1OpifZVYdT9IRAiD/AKCsXsuQ5OTX/rP8bqBNfyLafjxlHACePZWk NyLJlx0UV/+886A31ONn69Y= =V8+t -----END PGP SIGNATURE----- --Boundary-02=_1Fny/2idILQu2U7--