I have a hypothetical set of questions to ask: With a Sonnet ATA 133 RAID card I can do a minimum of 2 volumes using a maximum of 4 drives. Can I sub-divide those 2 RAID volumes with partitions and boot from those sub partitions individually? How many sub partitions can OS X handle per drive channel/physical drive before it goes nuts? WTF are the functional differences between the various RAID structures and how did they evolve? In a mixed (OS 9, OS X, OS X server and VPC) environment what are the least problematic volume structures with decent redundancy and efficiency? Which OS X-compatible disk utility will do smaller block sizes? Assuming I use a PCI card with HW RAID support what are my options of the above structures?