FreeBSD 5.4 CD and Adaptec 2010s controller w/ RAID 10

[M. L.]

Hi list,

 I'm having a strange problem while trying to install FreeBSD on a 
pentium 4 server with an adaptec 2010s controller with a built RAID 10. 
It goes fine until

> it tries to read the CD (to install FreeBSD), at that point it starts 
> spitting random numbers and letters in blocks, something like:
>
> cc 99 cc aa dd 99 cc 99 cc aa dd 99 cc 99 cc aa dd 99
> cc 99 cc aa dd 99 cc 99 cc aa dd 99 cc 99 cc aa dd 99
> cc 99 cc aa dd 99 cc 99 cc aa dd 99 cc 99 cc aa dd 99
> cc 99 cc aa dd 99 cc 99 cc aa dd 99 cc 99 cc aa dd 99
> cc 99 cc aa dd 99 cc 99 cc aa dd 99 cc 99 cc aa dd 99
>
>
> (letters/numbers are different)
>
> and it never stops. If I destroy the RAID 10, FreeBSD will boot up 
> fine and detect all 4 disks.. if I insert a Windows CD, it will go to 
> Windows the installation screen, which leads me to believe it is a 
> problem related with FreeBSD and the fact that there is a RAID 10 
> created (remember, if I destroy the RAID it works fine and will go to 
> sysinstall)
>
> This is my first RAID installation on a FreeBSD system, so I might be 
> missing something obvious.. Does anyone have a clue ?
>
> Thanks in advance!
>