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Last update by mayur on 03/28/2014
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How many RAID levels are there and what are they?

Answer:

7
Raid 0 - Disk Striping
Raid 1 - Disk mirroring/duplexing
Raid 2 - Disk striping with Multiple parity drives
Raid 3 & 4 - Disk striping with dedicated parity
Raid 5 - Disk striping with distributed parity
Raid 6 - Disk striping with extra parity

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