Troubleshooting OpenSolaris USB Boot

My BIOS will hang if a bootable OS USB drive is present during POST - before mem test if present at boot, or at whatever moment it is inserted.

GParted output for unknown OS config:

/dev/sda
unallocated 2MB
/dev/sda1 992MB unknownFS BOOT
diskLabelType: msdos
Heads: 255
Sectors/Track: 63
Cylinders: 126

fdisk output for same:
Disk ID: 0x000000000
/dev/sda1 BOOT Id=bf System=Solaris
Partition 1 has different physical/logical beginnings (non-Linux?):
phys=(1023, 254, 63) logical=(0, 65, 2)
Partition 1 has different physical/logical endings:
phys=(1023, 254, 63) logical=(126, 182, 56)



Now write USB key with FreeNAS Embedded using m0n0wall procedure (as root):

gunzip -c /home/geoff/Desktop/FreeNAS-amd64-embedded-0.7.4919.img| dd of=/dev/sda bs=16k


boot from the USB key to verify that it was correct: YES, FreeBSD starts to load


GParted output:

/dev/sda
unallocated 988MB
diskLabelType: unrecognized
Heads: 255
Sectors/Track: 63
Cylinders: 126


fdisk output:

This disk has both DOS and BSD magic
Give the 'b' command to go to BSD mode.

disk id: 0x90909090
/dev/sda4 BOOT id=a5 System=FreeBSD
Partition 4 has different physical/logical endings:
phys=(1023, 254, 63) logical=(3, 28, 41)

[give 'b' command]

Partition /dev/sda4 has invalid starting sector 0.