From owner-freebsd-scsi Sun Mar 24 14:24:25 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id OAA28076 for freebsd-scsi-outgoing; Sun, 24 Mar 1996 14:24:25 -0800 (PST) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id OAA28044 for ; Sun, 24 Mar 1996 14:24:14 -0800 (PST) Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id AAA03586 for ; Mon, 25 Mar 1996 00:24:03 +0200 Received: by sax.sax.de (8.6.11/8.6.12-s1) with UUCP id XAA01023 for freebsd-scsi@freebsd.org; Sun, 24 Mar 1996 23:24:03 +0100 Received: (from j@localhost) by uriah.heep.sax.de (8.7.4/8.6.9) id WAA05745; Sun, 24 Mar 1996 22:32:38 +0100 (MET) Date: Sun, 24 Mar 1996 22:32:38 +0100 (MET) Message-Id: <199603242132.WAA05745@uriah.heep.sax.de> X-Newsreader: knews 0.9.3 Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) Organization: Private BSD site, Dresden From: j@uriah.heep.sax.de (J Wunsch) Subject: Re: SCSI bus hangs - AIC7870 (fwd) To: freebsd-scsi@freebsd.org Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Can anybody give this guy help? ----- Forwarded Message ----- From: swhite@xwing.wcape.gov.za (Sean White) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: SCSI bus hangs - AIC7870 Date: 19 Mar 1996 10:32:22 GMT Organization: Internet Africa Message-ID: <4im2fm$aqa@newnews.iafrica.com> J Wunsch (j@uriah.heep.sax.de) wrote: : Can you play with the timeouts in the sys/scsi/st.c tape driver? Each : call to scsi_scsi_cmd() gets a timeout parameter (in milliseconds, if : i remember well). Try a simple tweaking, and see if it helps. Well, I tried that - increased the timeout values by a factor of 10 - and it helped not a bit. Nothing. I stripped the machine and found that the terminators were enabled on the HDD (as expected, seeing as it's on the end of the cable) but still can't check the tape drive termination. I've disabled the termination on the HDD and stuck it in the middle of the cable and put the DAT on the end. Everything works (or doesn't) as before - still got the hangs. I'm going to try shoving a AHA2742AT EISA card into the machine to see if that resolves the issue, but is there anything else I can try to get this lot working as it's supposed to? Oh, I've captured the message that the machine comes up with just as it hangs. This is while doing 'mt rewind' :- ahc0: target 0, lun 0 (sd0) timed out st0(ahc0:1:0): BUS DEVICE RESET message queued. ahc0: target 0, lun 0 (sd0) timed out .... and that's where the machine sits. Locked. Does that give anyone any ideas? Regards, Sean (about to shoot this machine!) White.