Installation Problem (Synchronize Cache)?

[Rishi Chopra]

I'm having a problem installing FreeBSD on my Dell Dimension XPS120C w/ 
Adaptec 2400A Raid Controller (4x200GB Raid5).  The second installation 
disk almost finishes loading when the program gets stuck on:

"(da0:asr0:0:0:0): Synchronize cache failed, status == 0x1b, scsi status 
== 0x0"

What could this mean?  I've been able to install the OS on this machine 
with the exact same configuration multiple times before.

-Rishi