Using the RAID Calculator you can calculate the capacity, speed gain and the fault tolerance for:
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RAID 0
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RAID 1
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RAID 1E
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RAID 5
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RAID 5E
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RAID 10
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RAID 6
RAID (Redundant Array of Inexpensive Disks) is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for the purposes of data redundancy and performance improvement.