IBM eServer x225 - LSI 1030 SCSI - BTX Halted / infinite loop

[underligast]

I'm trying to install FreeBSD 7.0 on my "new" server, an IBM eServer x225
(8647-5CG)
The server/drives runs fine under windows 2003 and ubuntu server but the
FreeBSD installation just halts.

So far i've tried:
CD: disk1 from 6.2, 7.0,
CD: bootonly from 7.0
Floppys: 7.0

They all end the same, cds with an infinite loop of numbers, floppys with
BTX Halted and a lot of numbers.

int=0000000d    err=00000000    efl=00010006    eip=000219b2
eax=000219ac    ebx=00000000    ecx=c0000080    edx=000587d8
esi=0003e007    edi=00000000    ebp=0008fcbc    esp=00099c88
cs=0008   ds=0010   es=0010   fs=0010   gs=0010   ss=0010
cs:eip=0f 32 0d 00 01 00 00 0f-30 0f 20 e0 83 c8 30 0f
       22 e0 b8 00 c0 03 00 0f-22 d8 0f 20 c0 0d 00 00
ss:esp=90 95 00 00 00 80 fc 00-00 90 fc 00 07 e0 03 00
       00 00 00 00 07 d0 03 00-00 00 00 00 cc 87 05 00
BTX halted

The only difference is when i boot from 7.0-STABLE-200804-i386-bootonly.iso,
then i see

BTX loader 1.00 BTX version is 1.02
Consoles: internal video/keyboard
BIOS CD is cd0
BIOS drive A: is disk0

Then it stops.
If i remove both the harddrives i can boot into the freebsd installer, but
as there are no drives, there is nowhere to install.

Atleast when i started with the floppys it detected drive1 and 2 before BTX
halted..

I dont know what to do anymore, there is just no way to get freebsd to
install on this thing.
Is it the LSI controller, it should still be initiated when there are no
drives in it, and the installation starts fine then.
Is it the Motherboard, the bios, the cpu, the ram? what?
The disks, having just one in doesn't work, switching positions doesn't
work?

Does anyone have any idea on how i can proceed once i'm in the installation,
can i mount the drives and install somehow?

The hardware is:
1x Xeon 2.8GHz(512KB), 2x 2048MB PC2100 DDR SDRAM (ecc), 2x 74GB 10K rpm
U320 HDD, Ultra320 SCSI, 48x CD-ROM, Broadcom NetXtreme 10/100/1000
Integrated Ethernet, ATI Rage XL