>If a RAID fails and your media is split up among the drives what do you do then?
It depends on what you mean by failure. Parity information is kept in a RAID 5, so if a drive fails, the RAID goes into a degenerated state. In a degenerated state, data is still accessible. In those cases you will swap out the failed drive, and set the RAID to rebuild. No down time, no data loss.
There are many different kinds of RAIDs out there, and Ben King, one of the mods here, wrote a pretty good article on RAIDs in the supermag:
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