lockup during rdump

fxp scsi system, dmesg appended
current as of 2005.04.01 02:14 gmt
full make and install of world and kernel with portupgrade (which was minor)

system locks up during rdump

at a ssh pty or the serial console, it will echo what you type, but
hit return and it does not respond.  a remote gkrellm can see
changes in the gkrellmd running on the box (over an ssh tunnel).

i found no way to get its attention to get a dump, and am open to
suggestions.

it requires the reset key.

send clue, please

randy

---

Copyright (c) 1992-2005 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD 6.0-CURRENT #20: Fri Apr  1 03:02:59 GMT 2005
    root_at_roast.psg.com:/usr/obj/usr/src/sys/ROAST
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) 4 CPU 1.70GHz (1699.82-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf13  Stepping = 3
  Features=0x3febf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM>
real memory  = 536805376 (511 MB)
avail memory = 520327168 (496 MB)
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <IntelR AWRDACPI> on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff,0x400-0x4bf on acpi0
pci_link0: <ACPI PCI Link LNKA> irq 11 on acpi0
pci_link1: <ACPI PCI Link LNKB> irq 9 on acpi0
pci_link2: <ACPI PCI Link LNKC> irq 0 on acpi0
pci_link3: <ACPI PCI Link LNKD> irq 10 on acpi0
pci_link4: <ACPI PCI Link LNK1> irq 7 on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci_link5: <ACPI PCI Link LNKE> irq 12 on acpi0
pci_link6: <ACPI PCI Link LNKF> irq 5 on acpi0
pci_link7: <ACPI PCI Link LNK0> irq 0 on acpi0
pci2: <ACPI PCI bus> on pcib2
ahc0: <Adaptec aic7899 Ultra160 SCSI adapter> port 0x9000-0x90ff mem 0xe2200000-0xe2200fff irq 10 at device 5.0 on pci2
ahc0: [GIANT-LOCKED]
aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
ahc1: <Adaptec aic7899 Ultra160 SCSI adapter> port 0x9400-0x94ff mem 0xe2202000-0xe2202fff irq 11 at device 5.1 on pci2
ahc1: [GIANT-LOCKED]
aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs
fxp0: <Intel 82559 Pro/100 Ethernet> port 0x9800-0x983f mem 0xe2203000-0xe2203fff,0xe2100000-0xe21fffff irq 5 at device 6.0 on pci2
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp0: Ethernet address: 00:30:48:51:c8:5e
fxp1: <Intel 82559 Pro/100 Ethernet> port 0x9c00-0x9c3f mem 0xe2201000-0xe2201fff,0xe2000000-0xe20fffff irq 12 at device 7.0 on pci2
miibus1: <MII bus> on fxp1
inphy1: <i82555 10/100 media interface> on miibus1
inphy1:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp1: Ethernet address: 00:30:48:51:c8:5f
pci2: <display, VGA> at device 8.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH2 UDMA100 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xf000-0xf00f at device 31.1 on pci0
ata0: <ATA channel 0> on atapci0
ata1: <ATA channel 1> on atapci0
pci0: <serial bus, USB> at device 31.2 (no driver attached)
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
pci0: <serial bus, USB> at device 31.4 (no driver attached)
acpi_tz0: <Thermal Zone> on acpi0
fdc0: <floppy drive controller> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on acpi0
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A, console
sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
orm0: <ISA Option ROMs> at iomem 0xc0000-0xc7fff,0xce000-0xcefff on isa0
ppc0: parallel port not found.
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x100>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 1699818116 Hz quality 800
Timecounters tick every 1.000 msec
ipfw2 initialized, divert loadable, rule-based forwarding disabled, default to deny, logging disabled
acd0: CDROM <MATSHITA CR-177/7T0D> at ata1-master UDMA33
Waiting 5 seconds for SCSI devices to settle
da0 at ahc0 bus 0 target 0 lun 0
da0: <SEAGATE ST336607LC 0005> Fixed Direct Access SCSI-3 device 
da0: 160.000MB/s transfers (80.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da0: 35003MB (71687372 512 byte sectors: 255H 63S/T 4462C)
Trying to mount root from ufs:/dev/da0s1a