FreeBSD6.0 BETA5

Hi, for the first time  FreeBSD 6.0 recognizes my SATA drives, yippie!  
Yesterday's 6.0BETA4 would not initialize ad4 and ad6 would freeze up under 
moderate  writes so whatever changed between BETA4 and BETA5 has been a real 
improvement.

Under FreeBSD5.4 both drives always initialize just fine,  but even after this 
new BETA5 I stille have to boot the machine multiple times before both drives 
initialize, usually just one or the other will.  Also dmesg  is still showing 
some sort of error "ata2: FAILURE -  oversized DMA transfer attempt 8704 > 
7680".

Here is from my dmesg after a successful boot:

atapci0: <SiI 3112 SATA150 controller> port 
0xec00-0xec07,0xe800-0xe803,0xe400-0xe407,0xe000-0xe003,0xdc00-0xdc0f mem 
0xdffffe00-0xdfffffff
 irq 5 at device 8.0 on pci0
[snip]

ad0: 6149MB <WDC AC26400B 32.02S32> at ata0-master UDMA33
acd0: CDRW <TEAC DVD+RW DV-W58E/D.0J> at ata1-master UDMA33
ad4: 76319MB <WDC WD800JD-00HKA0 13.03G13> at ata2-master SATA150
ata2: FAILURE - oversized DMA transfer attempt 8704 > 7680
ad4: setting up DMA failed
ad6: 114473MB <WDC WD1200JD-00HBB0 08.02D08> at ata3-master SATA150
ata3: FAILURE - oversized DMA transfer attempt 8704 > 7680
ad6: setting up DMA failed
cd0 at ata1 bus 0 target 0 lun 0
cd0: <TEAC DVD+RW DV-W58E D.0J> Removable CD-ROM SCSI-0 device
cd0: 33.000MB/s transfers
cd0: cd present [20339 x 2048 byte records]
[snip]


uname -ar:

FreeBSD ringworm.mechee.com 6.0-BETA5 FreeBSD 6.0-BETA5 #2: Sun Sep 18 
14:40:15 PDT 2005     
root_at_ringworm.mechee.com:/usr6/obj/usr6/src/sys/RINGWORM6  i386

Drive ad6 still locks up with moderate writes and freezes the entire system 
under BETA5

-Mike