I confirmed I get the exact same behavior with 2.6.18-mm3 and ext3.. So I don't think XFS is the problem. Its _really_ annoying that the box is more stable under windows then linux :-( Is there anything I can do to help narrow it down? The configs are the same as in the previous post, except this time I booted with 2.6.18-mm3. I suspect a SATA problem, but I'm unsure what to test? should I try booting with acpi=off? or maybe disabling (l?)apic stuff? I don't have any idea what boot options are relavent...Given it only flakes under 'heavy' load, could it be interrupt related? Steve - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html