While reading the specs, I noticed that the pci-x cards support splitting each port to a unique irq pin. If you have 6 cards with 4 ports, can you spread the load over 24 irqs ? I dont know if the motherboard can support this, or the driver could be modified to do this. It would be nice when there is a lot of of disk traffic on lots of drives.... adding port multiplier drives to each channel. I am trying to build a VERY large duplication system using LOTS of bandwidth. the irq can really put stress on the system. the final system would be 100+ drives all going over 22mb/s. It should give a nice supermicro board with 3 buses a real workout. Trent - 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