I do a lot of digital photography, and over the course of the last year, I've shot several big jobs and now have a (very pretty) stack of 8 lacie/porsche 250gb drives on my desk with all the raw files. I am wondering if it is possible to raid them, and what the pros and cons are. some questions: if I raid them, can I remove and/or add drives easily without having to redo any of the setup? do I need to reformat anything or can the data remain in place? the drives are all currently identical, but in the future, I may use different brands or capacities - will this be a problem? what do the different 'levels' of raid mean? thanks for any info!