Instant Reboot with 7.0 BETA4 LifeFS Disk

[Seth Hieronymus]

In testing my Windows desktop with the 7.0 LiveFS disk (
7.0-BETA4-amd64-livefs.iso), I get an instant reboot when the CD is run.  As
far as I can tell, no console messages are printed, so it seems the error
happens very early in the loading process.  Other FreeBSD versions (6.2,
i386 7.0) also exhibit the same behavior.  If left alone, the computer will
just continually reboot.

The specs of the system are:
Soltek SL-k8TPro-939 (Via K8T800 Pro ATX) motherboard
AMD Athlon64 3800+  Newcastle 2.4GHz
Promise FastTrak 579 RAID Controller (PDC20579)
2x Seagate Barracuda 7200 SATA 150 disks in RAID 1
Re-badged Radeon 9600 Pro 256MB 128-bit DDR AGP video card

My guess is that the disk controller is not supported.  Should this cause an
instant reboot with a live filesystem disk?  Is there anyway to debug this
since no console messages are printed?

Thanks for the help,
Seth Hieronymus