With the standard SCSI driver, I'm keep getting lots of bus errors
everytime I try to do anything disk intensive such as compile.  I switched
over to the SBC driver, and found that all becomes well, however I can't
access my CD-ROM drives any longer as /dev/cd? are no longer being
correctly detected.

When I boot with an SBC kernel, I see a whole bunch of kernel messages like
this and never see it detect my CD-ROMs:

Feb 23 15:40:12 kronos /netbsd: sbc0: parity error!
Feb 23 15:40:13 kronos last message repeated 15 times
Feb 23 15:40:13 kronos /netbsd: sbc0: reset SCSI bus for TID=5 LUN=0
Feb 23 15:40:13 kronos /netbsd: sbc0: parity error!
Feb 23 15:40:13 kronos last message repeated 24 times
Feb 23 15:40:13 kronos /netbsd: sbc0: reset SCSI bus for TID=5 LUN=0
Feb 23 15:40:13 kronos /netbsd: sbc0: parity error!
Feb 23 15:40:14 kronos last message repeated 24 times

I've included the dmesg from using the standard kernel below.  I'm running
this on a MacIIsi with 9 megs of RAM, a 40 meg internal HD, a 340 meg ext
HD, and 3 CD-ROM drives.

I'm trying to get this thing set up as a CD-ROM server, but right now it
seems I only have two choices: 1) Run the SBC kernel with no access to my
CD-ROM drives or 2) Run the standard kernel and put up with the many bus
errors and failing programs (what I'm doing right now).

Does anybody have any suggestions on what to do?  I'm feeling like I'm
overlooking something really basic with the SBC kernel...

Leonard
_________________
dmesg:
NetBSD 1.3.3 (kronosKern) #0: Mon Feb 22 23:01:28 PST 1999
    leonard@kronos:/usr/src/sys/arch/mac68k/compile/kronosKern
Apple Macintosh IIsi  (68030)
cpu: delay factor 77
real mem = 9109504
avail mem = 5537792
using 136 buffers containing 557056 bytes of memory
mrg: 'Mac IIsi class ROMs' ROM glue, tracing off, debug off, silent traps
mrg: I/O map kludge for ROMs that use hardware addresses directly.
adb: bus subsystem
Got following HwCfgFlags: 0xfc00, 0x    773f, 0x 1000126, 0x       0
mrg: setup_egret:
mrg: setup_egret: done.
\^H\^Hadb: extended keyboard at 2
adb: 100 dpi mouse at 3
mainbus0 (root)
obio0 at mainbus0
adb0 at obio0 (ADB event device)
asc0 at obio0: Apple Sound Chip
intvid0 at obio0: Internal Video
intvid0: 640 x 480, monochrome
grf0 at intvid0
ite0 at grf0 (minimal console)
ncrscsi0 at obio0
scsibus0 at ncrscsi0: 8 targets
sd0 at scsibus0 targ 0 lun 0: <CONNER, CP3040A-40mb-3.5, 2.31> SCSI1
0/direct fi
xed
sd0: 40MB, 1026 cyl, 2 head, 40 sec, 512 bytes/sect x 82080 sectors
sd1 at scsibus0 targ 2 lun 0: <MAXTOR, LXT-340S, 6.55> SCSI1 0/direct fixed
sd1: 324MB, 1546 cyl, 7 head, 61 sec, 512 bytes/sect x 665154 sectors
cd0 at scsibus0 targ 3 lun 0: <NEC, CD-ROM DRIVE:25, 1.0a> SCSI1 5/cdrom
removab
le
cd1 at scsibus0 targ 4 lun 0: <NEC, CD-ROM DRIVE:25, 1.0a> SCSI1 5/cdrom
removab
le
cd2 at scsibus0 targ 5 lun 0: <NEC, CD-ROM DRIVE:25, 1.0a> SCSI1 5/cdrom
removab
le
zsc0 at obio0 chip type 0
zsc0 channel 0: d_speed   9600 DCD clk 0 CTS clk 0
zstty0 at zsc0 channel 0
zsc0 channel 1: d_speed   9600 DCD clk 0 CTS clk 0
zstty1 at zsc0 channel 1
nubus0 at mainbus0
ae0 at nubus0 slot 9: MacCon Ethernet, 32KB memory
ae0: Ethernet address 00:00:94:22:22:d8
fpu0 at mainbus0 (mc68882)
boot device: sd1
root on sd1a dumps on sd1b
PRAM: 0x36d31a94, macos_boottime: 0x36d31a82.
root file system type: ffs
cd2(ncrscsi0:5:0): error code 0
cd2(ncrscsi0:5:0): error code 0
cd2(ncrscsi0:5:0): error code 0
cd2(ncrscsi0:5:0): error code 0
cd2(ncrscsi0:5:0): error code 0
cd2(ncrscsi0:5:0): error code 0
cd2(ncrscsi0:5:0): error code 0
cd2(ncrscsi0:5:0): error code 0
cd2(ncrscsi0:5:0): error code 0
cd2(ncrscsi0:5:0): error code 0

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