From owner-freebsd-hackers Sat Nov 15 21:06:45 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id VAA18346 for hackers-outgoing; Sat, 15 Nov 1997 21:06:45 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from austin.polstra.com (austin.polstra.com [206.213.73.10]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id VAA18334 for ; Sat, 15 Nov 1997 21:06:37 -0800 (PST) (envelope-from jdp@austin.polstra.com) Received: from austin.polstra.com (jdp@localhost) by austin.polstra.com (8.8.7/8.8.7) with ESMTP id VAA26780 for ; Sat, 15 Nov 1997 21:06:36 -0800 (PST) (envelope-from jdp) Message-Id: <199711160506.VAA26780@austin.polstra.com> To: hackers@freebsd.org Subject: Problems with BusTek SCSI controller and CD-ROM Date: Sat, 15 Nov 1997 21:06:36 -0800 From: John Polstra Sender: owner-freebsd-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk I have an old ISA bus machine with a BusTek (now BusLogic) BT542 SCSI controller. It works fine with the two hard drives that I have installed. But when I added a Plextor 4x CD-ROM drive today, it caused the system to hang during the probe of the controller. The last message on the console before the hang is: bt0: reading board settings, dma=5, int=11 If I wait several minutes, it eventually gives a further message "bt0: not taking commands!". Then it drops into the kernel debugger. I get identical failures with a -current system from late September and with a 2.2.2 boot floppy. It's not a problem with termination, and I've tried rearranging the devices on the SCSI bus without results. The power-up messages from the controller's BIOS show that it recognizes the CD-ROM drive as well as both hard disks. And booting from hard disk (up until the hang) works fine. Also, if I boot from a DOS floppy with the appropriate drivers on it, DOS talks to all the devices without problems. So this seems to be a problem specific to FreeBSD. Any ideas? John -- John Polstra jdp@polstra.com John D. Polstra & Co., Inc. Seattle, Washington USA "Self-knowledge is always bad news." -- John Barth