Problem with Serverworks HT1000 serial ATA support - Tyan S3992 Motherboard

[N. Harrington]

 Hello
 I am testing out a new tyan motherboard that uses the
next generation of AMD chips and the Serverworks
Chipset. It seems that I can reliably crash it with a
simple bonnie++ test if I set:

/boot/loader.conf  - Used for DiskD for Squid
  kern.ipc.msgtql=2048 

 I am using FreeBSD 6.1-STABLE amd64. This all works
just fine on a non Serverworks Chipset Tyan Board.
(literaly I unplug the drive and move it to another
system and it works and works in production)


 If I run: bonnie++ -d /home -u root s1g
  The system reboots.

 I have tried this is both S-ATA and P-ATA emulation.

 Any ideas on why this setting, which works on non
Serverworks boards, would make the Serverworks so
twitchy?


  Thanks

  Nicole


atapci0: <ServerWorks HT1000 SATA150 controller> port
0xb080-0xb087,0xb000-0xb003,0xac00-0xac07
,0xa880-0xa883,0xa800-0xa81f mem 0xff4fe000-0xff4fffff
irq 11 at device 14.0 on pci1

S-ATA:
ad4: 70911MB <WDC WD740ADFD-00NLR1 20.07P20> at
ata2-master SATA150

 OR
P-ATA:
ad4: DMA limited to UDMA33, device found non-ATA66
cable
ad4: 70911MB <WDC WD740ADFD-00NLR1 20.07P20> at
ata2-master UDMA33

/boot/loader.conf
kern.ipc.msgtql=2048