Alan, It's funny you mention reliability because the machine using the Promise RAID drivers developed an issue with the Windows partition today and has booted up a couple times reporting that a RAID drive had failed. I am still trying to pin down if the Promise controller is going or a drive since it seems to be very random (ie it stopped reporting the RAID drive error). Is it the Promise RAID driver itself that is considered buggy? I ask because the other machine arrived with only Promise RAID SATA ports (which I am using in Ultra DMA mode instead of RAID mode through the Linux 2.6 promise-sata driver). Hopefully the Promise chipset can be considered reliable in the simple use as a simple SATA controller in combination with Linux software RAID-1. On the other machine with the problem Promise RAID at least I have the option of switching over to the ICH5 based SATA. Jack