i have a 500gb(Western Digital) external connected to my desktop and have another 500gb(seagate) thats not in use. i was thinking of remove the drives and putthing them into an enclosure that does raid 0 (mirroring?) then came across jbod which im not to familiar with as im not too familiar with raiding either. i read that jbod adds up different drives sizes into one? say i have a 500+500 + 1tb which would be 2tb. but if 1 x 500gb fails do i lose all the data? or can i just remove the dead drive, replace and everything would be fine?