If you have SCSI you can stream hefty samples from your SCSI drive and use your IDE drives as \"spares\". Not that an UWSCSI drive usually chokes that often :-)
What about having two IDE drives each on their own channel (not as a slave, but both as master drives)?
I have also wondered how a raid drive setup will perform in comparison to an SCSI non-raid drive setup for Giga. Has anyone done any comparisons between the two to see if one or the other has any positive or negative performance issues? A high speed SCSI setup is still so darned expensive.