Registered: 27/02/2003
Posts: 780
Loc: Washington, DC metro
And for the Novice, "Parity" in this case simply means that if any single drive of the 3 (or more in larger arrays) fails, that one drive can be replaced, and all the original information on the combined drives is still there (usually with a bit of work).
If more than one drive fails at once, you need a DLT or DVD-RAM or something else with a recent backup.