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sun 4/300 troubles



I'm having trouble booting my Sun 4/300 with a freshly cvs'd system.
Attached is the boot messages... Any ideas?

This machine has only one disk attached to it, and boots a 2.1 kernel just
fine.

--Jason

Boot: sd(0,0,0)nbsd 
>> OpenBSD BOOT [$Revision: 1.4 $]Booting nbsd @ 0x40001490944+127808+108288+[56592+63863]=0x1c70cf[ preserving 120464 bytes of bsd symbol table ]Copyright (c) 1982, 1986, 1989, 1991, 1993
	The Regents of the University of California.  All rights reserved.

OpenBSD 2.2 (GENERIC) #0: Sat Jan  3 04:11:11 EST 1998
    root_(_at_)_second_(_dot_)_thought_(_dot_)_net:/sys/arch/sparc/compile/GENERIC
real mem = 33529856
avail mem = 29515776
using 200 buffers containing 1671168 bytes of memory
bootpath: /obio0/esp0/sd_(_at_)_0,0
mainbus0 (root): SUN-4/300 series

cpu0 at mainbus0: cache chip bug; trap page uncached: CY7C601 @ 25 MHz, L64812 or ACT8847 FPU
cpu0: 128K byte write-back, 16 bytes/line, sw flush cache enabled
obio0 at mainbus0
le0 at obio0 addr 0xf9000000 pri 6: address 08:00:20:0b:62:e6
le0: 8 receive buffers, 2 transmit buffers
clock0 at obio0 addr 0xf2000000: mk48t02 (eeprom)
timer0 at obio0 addr 0xef000000 delay constant 10
memreg0 at obio0 addr 0xf4000000
zs0 at obio0 addr 0xf1000000 pri 12, softpri 6
zs0a: console i/o
zs1 at obio0 addr 0xf0000000 pri 12, softpri 6
zs2 at obio0 addr 0xe0000000 pri 12, softpri 6
dma0 at obio0 addr 0xfa001000: rev 0
esp0 at obio0 addr 0xfa000000 pri 4: ESP100A, 24MHz, SCSI ID 7
scsibus0 at esp0: 8 targets
sd0 at scsibus0 targ 0 lun 0: <SEAGATE, ST41651, 7668> SCSI2 0/direct fixed
sd0: 1350MB, 2107 cyl, 15 head, 87 sec, 512 bytes/sec, 2766300 sec total
vmel0 at mainbus0
vmes0 at mainbus0
root on sd0a
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; sending REQUEST SENSE
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; resetting
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; resetting
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; resetting
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; resetting
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; resetting
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; resetting
rootdev=0x700 rrootdev=0x1100 rawdev=0x1102
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; resetting
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; resetting
(esp0:0:0): select; 6 left in DMA buffer
esp0: unexpected disconnect; resetting
panic: cannot open disk, 0x700/0x1100, error 5
Stopped at      _Debugger:      ta              %icc, 0x1
ddb> trace
_dk_mountroot(0x2a8, 0x0, 0x1, 0x0, 0x0, 0x800) at _dk_mountroot+0xac
_vfs_mountroot(0x0, 0xf8128760, 0xd, 0x4000000, 0xffffffff, 0x3) at _vfs_mountroot+0x18
_main(0x0, 0x8, 0x1, 0xf8178097, 0xffffffff, 0x10) at _main+0x39c
_getidprom(0x349400, 0x340c34, 0x33fefc, 0x33fea4, 0x346a90, 0x0) at _getidprom+0x424ddb
_dk_mountroot(0x2a8, 0x0, 0x1, 0x0, 0x0, 0x800) at _dk_mountroot+0xacddb> machine prom
Abort at PC 0xF8157AE4.
>