The source is 2 30GB IDE drives (the factory drives for this unit), and the destination is 2 32GB 133x rated Compact Flash cards.

Using a USB to IDE adaptor, I was able to make a disk image of the second 30GB drive in 53 minutes, with the tool reporting a speed of 9,417,974 bytes/second. The temporary space for the disk image was an internal SSD. Writing back out using the same USB to IDE converter is a bit slower, with a disk monitor showing ~1.79MB/s write rate. Took 4 and a half hours to write out the 30gb image.

Now the drives are in the empeg, and it worked just fine the first boot. My playlist position is exactly where I left off, and now I can seal the unit back up and start preparing for it to return to use in the car.