From owner-freebsd-scsi@FreeBSD.ORG Wed Oct 28 09:42:36 2009 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 423A2106568D for ; Wed, 28 Oct 2009 09:42:36 +0000 (UTC) (envelope-from dan@langille.org) Received: from nyi.unixathome.org (nyi.unixathome.org [64.147.113.42]) by mx1.freebsd.org (Postfix) with ESMTP id 17B028FC25 for ; Wed, 28 Oct 2009 09:42:36 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by nyi.unixathome.org (Postfix) with ESMTP id B170C50A51; Wed, 28 Oct 2009 09:42:35 +0000 (GMT) X-Virus-Scanned: amavisd-new at unixathome.org Received: from nyi.unixathome.org ([127.0.0.1]) by localhost (nyi.unixathome.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id f46krPujf4CI; Wed, 28 Oct 2009 09:42:34 +0000 (GMT) Received: from smtp-auth.unixathome.org (smtp-auth.unixathome.org [10.4.7.7]) (Authenticated sender: hidden) by nyi.unixathome.org (Postfix) with ESMTPSA id 41A3750A1A ; Wed, 28 Oct 2009 09:42:34 +0000 (GMT) Message-ID: <4AE8120A.70608@langille.org> Date: Wed, 28 Oct 2009 05:42:34 -0400 From: Dan Langille User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: Adam McDougall References: <4AE7A0BB.8020402@langille.org> <20091028021932.GL62972@egr.msu.edu> In-Reply-To: <20091028021932.GL62972@egr.msu.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-scsi@freebsd.org Subject: Re: tape changer, but not tape drive X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Oct 2009 09:42:36 -0000 Adam McDougall wrote: > On Tue, Oct 27, 2009 at 09:39:07PM -0400, Dan Langille wrote: > > I first encountered this problem in April, now I'm back to it: > > http://lists.freebsd.org/pipermail/freebsd-scsi/2008-April/003452.html > > In short, the system has tape library. The library has worked in the > past (http://www.freebsddiary.org/digital-tl891.php) but now it does > not. I can see either the tape library or the tape drive. Which I see > depends upon the cable configuration. > > http://www.freebsddiary.org/images/tape-libraries-cables.jpg > > As shown above, that's how I would expect things to work normally. > However, in that configuration, I do not see the tape drive. The cable > going down, goes to the computer. If I reconnect that cable to the plug > to the left of the terminator, the system can see the DLT drive, but not > the tape library. > > Under 6.3-STABLE FreeBSD, I can see either one device or the other. > > ch0 at ahc0 bus 0 target 0 lun 0 > ch0: Removable Changer SCSI-2 device > ch0: 20.000MB/s transfers (10.000MHz, offset 8, 16bit) > ch0: 10 slots, 1 drive, 1 picker, 0 portals > > or > > sa0 at ahc0 bus 0 target 1 lun 0 > sa0: Removable Sequential Access SCSI-2 device > sa0: 20.000MB/s transfers (10.000MHz, offset 8, 16bit) > acd0: FAILURE - INQUIRY ILLEGAL REQUEST asc=0x24 ascq=0x00 sks=0x40 0x00 > 0x01 > > Any ideas? > > Full dmesg output here: http://www.langille.org/tmp/dmesg.boot > > TIA. > > Is it possible the middle cable is broken in some way? Perhaps you > could swap it with another cable to try to find out, such as with > the cable going from the library to the 2944 card. Might be intermittant > and start working if bent or moved. I did try that. I used the cable from my stand-alone DLT drive, which has been used before (and after) and is known to be good. > Also can you see the connectors > inside the library (on the back side of the external plate) to check > if they are well seated or damaged? I'll pull the unit apart and have a look. I have been in there before. Since it last worked, the unit has gone through two moves. > You could also try swapping the > first and second connection or the third and fourth, or both, if it is > hooked up like I think it is, those should have an equal chance of working > and might reveal a bad port or partially bad port. I did try moving the looped cable to plugs 1&2 and connecting my computer to plug 3. > Also try leaving off > the terminator or one/both ends of the middle cable just to see if the > system can tell the difference especially while booting, just to confirm > if it makes any negative difference at all. OK, I will try that. Thank you.