Hi, I have a system with 2 x 74Gb Raptor HD's (SATA) running in a SATA RAID 0 setup. Everything was running fine until it just rebooted for no reason - I was converting video at the time. I rebooted and was given the message indicating "hd failed or corrupt" when in the Raid Setup page. It sees the whole array size (148 Gb) but when looking at the drives seperately, it only id's 1 drive, indicating the other has failed. Physically swapped them around, but same result. I have an old setup of 2 x 250Gb HD's from RAID 0. Removed the SATA drives and installed the older 250Gb drives as RAID 0. Same results as with the SATA RAID. I know for certain these drives work (250Gb's) so I'm thinking the onboard RAID controller has failed. I have an ASUS P4C800-Deluxe motherboard. Many thanks in advance. JD