From owner-freebsd-scsi Thu Sep 5 11:02:19 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id LAA06162 for freebsd-scsi-outgoing; Thu, 5 Sep 1996 11:02:19 -0700 (PDT) Received: from boris.clintondale.com (boris.clintondale.com [206.88.120.5]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id LAA06156 for ; Thu, 5 Sep 1996 11:02:16 -0700 (PDT) Received: from localhost (matt@localhost) by boris.clintondale.com (8.7.5/8.7.3) with SMTP id OAA00280 for ; Thu, 5 Sep 1996 14:02:13 -0400 (EDT) Date: Thu, 5 Sep 1996 14:02:12 -0400 (EDT) From: Matt Hamilton Reply-To: Matt Hamilton To: freebsd-scsi@freebsd.org Subject: SCSI bus resets with C1534A tape drive. Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Hi all, I have a HP C1534A tape drive hanging off an Adaptec 2940 SCSI card. The other devices on the bus are: 0: Micropolis 9440 (2GB) 1: Micropolis 9440 (2GB) 4: HP HP35470A T503 5: Sanyo CD-ROM drive I am running 2.1.5-RELEASE and whenever I access the tape, eg. mt -f /dev/rst0 erase the Tape drive starts working and then after a couple of minutes I get: Sep 5 12:41:58 boris /kernel: st0(ahc0:4:0): timed out in dataout phase, SCSISI GI == 0x0 Sep 5 12:41:58 boris /kernel: st0(ahc0:4:0): BUS DEVICE RESET message queued. Sep 5 12:41:58 boris /kernel: Bus Device Reset Message Sent Sep 5 12:41:58 boris /kernel: st0(ahc0:4:0): Bus Device Reset delivered. 1 SCBs aborted When using dump it is even worse, it resets all the SCSI devices! and I am forced to cycle power. I have tried increasing the timeout values in sys/scsi/scsi_base.c (as mentioned in a bug report a couple of weeks ago) but this has not helped. Does anyone know what the problem could be? If I can't resolv this then I am considering moving to 2.2-SNAP-960801. Are there any differences in the SCSI code? I am a bit reluctant to do this as it is a production machine and has to remain as atable as possible. TIA, Matt Matt Hamilton matt@clintondale.com