6.1 hangs at boot, sata raid controller unsupported?

[Daniel A.]

Hi,
I have had this problem since I tried to install 6.0 on my desktop
workstation, and even in 6.1, which has improved SATA RAID support, it
persists.
Original thread:
http://lists.freebsd.org/pipermail/freebsd-questions/2006-April/118272.html

Problem:
FreeBSD hangs when it detects my 120GB Seagate Barracuda drive,
attached alone to my onboard Promise FastTrak 376 controller.
Everything works perfectly in Windows. No errors, no problems.
FreeBSD will only boot in Safe Mode, and then it gives me this:
...
ad8: 114473MB <Seagate ST3120022A 3.06> at ata4-master PIO4
ad8: FAILURE - READ timed out LBA=234441585
ad8: TIMEOUT - READ retrying (1 retry left) LBA=0
ad8: FAILURE - READ timed out LBA=234441631
ad8: TIMEOUT - READ retrying (0 retries left) LBA=0
ad8: FAILURE - READ timed out LBA=234441644
ad8: FAILURE - READ timed out LBA=0
ad8: FAILURE - READ timed out LBA=234441585
ad8: TIMEOUT - READ retrying (1 retry left) LBA=0
...
When booting in non-safemode, it just hangs forever at the first line I pasted.
I've attached my old dmesg.boot from 6.0.

Please help. I love FreeBSD and I would be endlessly happy if I could
get it on my desktop. =/
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