Thanks for your reply... I will try the kext you mentioned, I have a few distros - it's bound to be on one of them! (is there also a kext for ICH9R RAID?)

To be honest, a good while ago when I installed the ToH RC2 build I'm sure I didn't get these problems either (using the same hardware)

I've actually ordered a replacement mobo - cheap! (I also have a funny reboot problem when a USB hub is connected that i can't find reported by anyone else either - not os specific btw) I'm not confident of my hardware.

FYI, it happens whenever I copy to the main system drive, from any source i.e. same drive cd or memory stick etc.

It happens mainly when copying a large file - odd that the IDE mode seemed to fix it, and I don't have any problems when using RAID in Vista.

As I said, I can only see it being hardware now - it seems that it's definitely not a common issue, and you have confirmed there is no problems on another P35 mobo.

Thanks again,

Jon.