nForce 430i doesn't recognise SATA devices

FreeBSD 7.0BETA4 can't be installed on a NVIDIA nForce 650i SLI /
nForce 430i based ASUS P5N-E SLI board.  The nForce 430i south bridge
SATA ports are detected SATA devices do not get probed or detected.
It complains about timeouts and the device name is "unknown".
FreeBSD 6.3RC1 doesn't work either.

The relevant portions of the dmesg are below (the JMicron controller
is only for an external ESATA port):

...
atapci0: <JMicron AHCI controller> port 0xdf00-0xdf07,0xde00-0xde03,
0xdd00-0xdd07,0xdc00-0xdc03,0xdb00-0xdb0f mem 0xfdefe000-0xfdefffff
irq 16 at device 0.0 on pci1
atapci0: [ITHREAD]
atapci0: AHCI Version 01.00 controller with 1 ports detected
ata2: <ATA channel 0> on atapci0
ata2: [ITHREAD]
...
atapci1: <nVidia nForce MCP51 UDMA133 controller> port 0x1f0-0x1f7,
0x3f6,0x170-0x177,0x376,0xfd00-0xfd0f at device 13.0 on pci0
ata0: <ATA channel 0> on atapci1
ata0: [ITHREAD]
ata1: <ATA channel 1> on atapci1
ata1: [ITHREAD]
atapci2: <nVidia nForce MCP51 SATA300 controller> port 0x9f0-0x9f7,
0xbf0-0xbf3,0x970-0x977,0xb70-0xb73,0xf800-0xf80f
mem 0xfe02d000-0xfe02dfff irq 20 at device 14.0 on pci0
atapci2: [ITHREAD]
ata3: <ATA channel 0> on atapci2
ata3: [ITHREAD]
ata4: <ATA channel 1> on atapci2
ata4: [ITHREAD]
atapci3: <nVidia nForce MCP51 SATA300 controller> port 0x9e0-0x9e7,
0xbe0-0xbe3,0x960-0x967,0xb60-0xb63,0xf300-0xf30f
mem 0xfe02c000-0xfe02cfff irq 21 at device 15.0 on pci0
atapci3: [ITHREAD]
ata5: <ATA channel 0> on atapci3
ata5: [ITHREAD]
ata6: <ATA channel 1> on atapci3
ata6: [ITHREAD]
...
unknown: timeout waiting to issue command
unknown: error issuing ATA_IDENTIFY command
...

Any help appreciated.

-- 
Andre