sparc trouble [panic: timeout_add: to_ticks < 0]

["Denis A. Doroshenko" <d.doroshenko@omnitel.net>]

when i load floppy30.fs on ss20 i get the following. any ideas on how to
fight it? thanks!

Copyright (c) 1995-2001 OpenBSD. Alll rightst reserved.  http://www.OpenBSD.org

OpenBSD 3.0 (RAMDISK) #35: Wed Oct 17 21:15:57 MDT 2001
    deraadt@sparc.openbsd.org:/usr/src/sys/arch/sparc/compile/RAMDISK
real mem = 267579392
avail mem = 244604928
using 200 buffers containing 13107200 bytes of memory
bootpath: /obio0/SUNW,fdtwo@0,700000
mainbus0 (root): SUNW,SPARCstation-20
cpu0 at mainbus0: TMS390Z50 v0 or TMS390Z55 @ 75 MHz, on-chip FPU
cpu0: physical 20K instruction (64 b/l), 16K data (32 b/l), 1024K external (32 b/l) cache enabled
obio0 at mainbus0
clock0 at obio0 addr 0xf1200000: mk48t08 (eeprom)
timer0 at obio0 addr 0xf1300000 delay constant 35
zs0 at obio0 addr 0xf1100000 pri 12, softpri 6
zs1 at obio0 addr 0xf1000000 pri 12, softpri 6
fdc0 at obio0 addr 0xf1700000 pri 11, softpri 4: chip 82077
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
auxreg0 at obio0 addr 0xf1800000
power0 at obio0 addr 0xf1a01000
iommu0 at mainbus0 ioaddr 0xe0000000: version 0x3/0x1, page-size 4096, range 64MB
sbus0 at iommu0: clock = 25MHz
dma0 at sbus0 slot 15 offset 0x400000: rev 2
esp0 at dma0 offset 0x800000 pri 4: ESP200, 40MHz, SCSI ID 7
scsibus0 at esp0: 8 targets
probe(esp0:1:0): esp0: timed out [ecb 0xf8816000 (flags 0x1, dleft 0, stat 0)], <state 2, nexus 0xf8816000, phase(l 12, c 100, p 3), resid 0, msg(q 0,o 0) >
panic: timeout_add: to_ticks < 0
halted

Program terminated
ok

-- 
Denis A. Doroshenko, GPRS engineer
Omnitel Ltd., T. Sevcenkos st. 25, Vilnius, Lithuania
d.doroshenko@omnitel.net, +370 2 262188