As detailed in the following link I have to disable pciide and set my BIOS to use SATA drives in 'compatible' mode in order to use my HP2133 netbook with the cheap 4GB SSD it came with: http://www.nabble.com/Re%3A-Interrupt-problems-with-recent-snapshot-p20160942.html I looked into the problem and discovered that my drive only supports Ultra-DMA mode 4. The pciide/wdc code forces various PIO/DMA settings (including UDMA5) when it detects a SATA drive in 'native' mode and dispenses with any autod...