you should really consider doing your recording a different way. from what your post indicates, you are trying to use the same "bus" (i.e. PCI) for multiple tasks. this is not recommended - and if you read more posts about users trying to do so, you will understand why. m-audio does not recommend that you have a firewire hard drive connected to the same firewire card as the 410. but to take it a step further, ideally, you want to isolate the "record path". by that i mean that if you can, you should have the 410 on it's OWN path (firewire). and you should consider giving the audio drive it's own path (i.e. IDE, SATA, USB are some options). by getting another PCI device, and trying to do things that way, you are still using the PCI bus. there could be potential resource conflicts, as wells as irq conflicts, and in general, you will be clogging up the PCI bus with all of that traffic, making your cpu / motherboard work harder to sort out all of the signals that are being routed through them. also, it is highly recommended that you avoid using the system drive as your audio drive. these are just a suggestions. my config uses the IDE as the system drive, and SATA II as the audio drive (in a raid-0 stripped configuration). with this type of setup, it isolates the audio signals from the "system" signals, and thus, helps the system run at top speed. consider this: if you had a straw in a glass of water, you could only get so much water out of the glass. if you had TWO straws, you could pull twice as much water out of the glass during the same time duration. good luck.