DELL SATA RAID support

[Saad Butt]

I have DELL poweredge 1425SC with 2x80GB Sata drives. I have configured
Raid-1 in BIOS and I am trying to install 6.0 CR-1 and it does'nt detect
SATA Raid Controller. The Hardware model is Dell CERC SATA RAID 2S and the
message that I get while installation is.
 atapci1: <Intel ICH5 SATA150 contorller> port 0xccb8-0xccbf, 0xccb0-0xccb3,
0xcca0-0xcca7, 0xcc98-0xcc9b, 0xcc80-0xcc8f irq 18 at device 31.2 on pci0
atapci1: failed to enable memory mapping!
 The link
ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/6.0-RC1/HARDWARE.HTM shows
that 6.0 CR-1 supports this hardware? Is anyone else facing the same problem
or have solution to it?