RAID issues with an P5N-E SLi mobo

Hi there,

I have an issue with my current system config and the RAID in particular. System specs are at the bottom of the post. I currently have a RAID0 array (2x80GB drives) that I use as my OS drive and installation of programs etc. and a RAID1 array (2x250GB) that I use for all my documents, save game files etc. When my machine boots up, the RAID manager used to say everything was fine and as time went on I had an intermitant message saying my RAID 1 was degraded yet when I was in Windows everything was fine under the NVIDIA control panel. Now both the BIOS and the NVIDIA control panel tell me the array is degraded. I have no problems reading the data but everytime I try to write to the RAID1 array, I get the message "Raid Access fail, critical error disk ST3250310AS Port: SATA 0.0" and the computer freezes for few seconds. According to SMART all the drives are fine. I've managed to back up all the files I need so can I go into the BIOS settings and rebuild the array? I think that it is a problem with the RAID chipset rather than the drives. Anyone have any suggestions on the best way to test this theory?

Hope I'm not being too much of a noob here! (just started learning about RAID arrays)

Here are the system specs:

Asus P5N-E SLI mobo
Intel Q6600
EVGA 8800GT
4GB OCZ DDR2 800
Logitech wireless keyboard and mouse
Soundblaster Audigy 2
ASUS/ViXs TV Tuner
DVD Burner (IDE)
2x80GB Maxtor drives in RAID 0 (SATA)
2X250 Seagate drives in RAID 1 (SATA)
Vista64 + SP1
550W ULTRA PSU


Thanks for any advice