It's true, most desktop IDE HDs are optimized for more-or-less single-tasking desktop-workload usage. The I/O queue depth isn't very high. If you want to handle higher levels of simultanous I/Os, move up to SCSI, the protocol was designed specifically with multi-tasking I/O in mind. Those that have used multiple optical drives on SCSI, vs. IDE, know exactly what I'm talking about. If you're stuck with using IDE, then for more efficient multi-tasking, have multiple physical HDs, on multiple independent IDE channels, to maximize I/O throughput. (For example, have a seperate HD to store CD/DVD images to burn, seperate from your normal OS drive, and so on. That way, if you are doing something that requires heavy paging activity to the OS drive, it won't interrupt your burn operation and invoke burn-proof and leave a tiny gap. In the "bad old days", there was no burn-proof feature, and doing just that, trying to multi-task on your PC while using an IDE burner, would often create a coaster. People that were heavily into CD-burning, either spent extra $$$ for SCSI, or set up a seperate dedicated machine for just burning, that they wouldn't touch while in operation.)