Intel ICH10R on the Asus P6T Dexluse V2. Standard RAID0 stripe, which I think is 128.
The write back is enabled....drives have had a complete scrub with a new beta firmware (OCZ). I created a 60GB volume, so that I could use either array AND possibly use just a single OCZ drive. So there is either a 20GB buffer (25%) on the Intel RAID Array or a 60GB buffer (50%) on the OCZ RAID Array. Less than 6 months use on any of the drives.