My post was corrected a on a few minor symantics. JBOD is not a true RAID mode (thus my corrections), but it is a kissing cousin to RAID beause it is an "array" of disks. Thus, calling it a RAID mode is more accurate than saying it is individual disks because being individual disks is what JBOD is trying to overcome.
Here is some light reading for you Sam...
http://www.pcguide.com/ref/hdd/perf/...evels/jbod.htm
http://www.pcguide.com/ref/hdd/perf/raid/index.htm
http://www.pcguide.com/ref/hdd/perf/...vels/index.htm
and this last one just helps for those confused and what RAID levels are what
http://www.webopedia.com/TERM/R/RAID.htm