8.0-beta3 does not detect several ata channels

Hi,

I have a hp proliant ML115 with 6 sata ports which run in ATA mode (bios 
doesn't appear to give the option to use AHCI).  On freebsd 7.x, all 
channels are detected.  On freebsd8.0-beta3, the disks attached to the 
first two SATA ports are not detected, although it detects the ports 
themselves.

I've attached a verbose dmesg from freebsd 7.1 and 8.0-beta3.

Any ideas on what's going on here?  This seems like a nasty regression.

Nick