My disk performance is consistently bad.
[in reality, it may be caused by the fact that I have less RAM to disk cache with, but faster disks wouldn't hurt].
The disk performance seems good to me as long as I'm not untarring or compiling--but often these run very smoothly (on a 360).
If you're not running Munin, I highly recommend doing so. You can download it from
What sort of stuff are you doing with your node that appears to be causing high disk consumption? Perhaps there's a way we could help you find a way to reduce it