hi-
     i've got a ss1 with 2 internal quantum 105MB drives (targets 1 and 3).
i tried to add an external Fujitsu M2624F-512 SCSI drive to this system 
(running today's -current) and it failed like this:

Copyright (c) 1982, 1986, 1989, 1991, 1993
        The Regents of the University of California.  All rights reserved.

NetBSD 1.0A (YIKES) #11: Wed Feb  1 14:54:41 CST 1995
    chuck@yikes.ccrc.wustl.edu:/usr/src/sys/arch/sparc/compile/YIKES
real mem = 16711680
avail mem = 14557184
using 204 buffers containing 835584 bytes of memory
mainbus0 (root)
cpu0 at mainbus0: Sun 4/60 (MB86900/1A or L64801 @ 20 MHz, WTL3170/2 FPU)
cpu0: 65536 byte write-through, 16 bytes/line, sw flush cache enabled
memreg0 at mainbus0 ioaddr 0xf4000000
clock0 at mainbus0 ioaddr 0xf2000000: mk48t02 (eeprom)
timer0 at mainbus0 ioaddr 0xf3000000
zs0 at mainbus0 ioaddr 0xf1000000 pri 12, softpri 6
zs1 at mainbus0 ioaddr 0xf0000000 pri 12, softpri 6
fd at mainbus0 ioaddr 0xf7200000 not configured
audio0 at mainbus0 ioaddr 0xf7201000 pri 13, softpri 4
sbus0 at mainbus0 ioaddr 0xf8000000: clock = 25 MHz
dma0 at sbus0 slot 0 offset 0x400000: rev 1
esp0 at sbus0 slot 0 offset 0x800000 pri 3: ESP100 25Mhz, target 7
scsibus0 at esp0
esp0 targ 1 lun 0: <QUANTUM, P105SS 910-10-94, 8.9> SCSI1 0/direct fixed
sd0 at scsibus0: 100MB, 1019 cyl, 6 head, 33 sec, 512 bytes/sec
error... error... error... error... error... error... error... error... error...
 error... error... error... error... error... error... error... error... error..
. error... error... error... error... error... error... error... error... error.
.. error... error... error... error... error... error... error... error... error
... error... error... <I hit L1-a here>


Interestingly enough, the third disk *does* work with the old SCSI 
system in NetBSD 1.0.   Maybe we can borrow some ideas from the old
driver to get the new one up to speed?   I currently don't know enough 
about SCSI to debug this properly.

Chuck