Date: Sat, 15 Nov 1997 21:06:36 -0800 From: John Polstra <jdp@polstra.com> To: hackers@freebsd.org Subject: Problems with BusTek SCSI controller and CD-ROM Message-ID: <199711160506.VAA26780@austin.polstra.com>
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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
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