Need a little help guys

My DVD burner (Samsung SH-S203D) is connected to the last port on ICH10R controller (SATA6), now it all works OK, but will only burn in PIO mode under Windows 7 RTM??

Controller is set to RAID mode as I have my non-member disk SSD on SATA1, and a RAID0 of 3 Seagate disks on SATA/2/3/4 and a caddy disk on SATA5.

I tried the burner on the JMicron port and it seems to work fine in DMA mode, but I don't want to use the JMicron controller whatsoever, one of the reasons being that it irritates me at boot up with that annoying message, but mostly because I'd just love it to work properly on the Intel controller.

Are we talking of maybe an incompatibilty between this burner and the Intel RAID controller for this drive, or is it so that on the RAII, one cant have any SATA optical device running in DMA mode when the controller is set to RAID in BIOS??

Any feedback appreciated

PS.
Tried all configuration of drivers, Intel chipset, no Intel chipset, Matrix Storage, no Matrix Storage etc. etc.