So....
I don't know anything about RAID.....I have a 250gig external drive. 80 gig in my MB, 120 gig and a 60 gig in my PC. What I'd like to do when I'm done editing this video, is potentially get another 250 gig external and either mirror them, or do that one type of RAID setup where it copies something like 60/60, so you can rebuild the entire thing if one drive fails.
Is there a simple way to do that and share the drives between computers? I could perhaps format them so I split it evenly? (I do photowork on the mac and video on the PC, Sony Vegas) And, the harddrive has one USB and two Firewire ports. Can I plug both computers into the thing at once? I might go find the HD website, it didn't really come with any manual or anything.
Nope, two computers can't mount the same drive at the same time (as far as i know). You could use each computer with the same drive at separate times (format it ntfs and get macfuse for the mac to let it read/write ntfs or just format it fat32 (windows won't format fat32 above 37gb or something like that, so use disk utility and it'll work on both windows and mac)).
I prefer just sharing drives on my network, plain oem drives are cheaper and I trust them in a nice cool computer case more than a little enclosure. macs tend not to have room for more, but pcs do, and file sharing with windows and linux is quite easy. I keep my photos on 2 hdds in separate machines, backing up automatically every night, but also when I get enough for a DVD or two, I burn DVDs and then periodically move the DVDs to my parent's house so I don't need to worry about theft, a fire or a giant power surge deleting all my work and memories.
Other folks have much more involved systems, but my system works great for me. I know that if i came home to a charred pile of rubble after work i'd never be out more than a few weeks of photos (I also throw the DVDs in my car so i don't forget to bring them home when next i visit the family). my music, video and other files I just keep on 2 separate hdds in 2 separate machines, but that's all replaceable if something catastrophic happened.