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ISRO2011-46

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RAID 1 consists of an exact copy of a set of data on two or more disks

RAID 2 stripes data at the bit level, and uses a hamming code for error correction.

RAID 3 consists of byte-level striping with a dedicated parity disk.

RAID 4 consists of block-level striping with a dedicated  parity disk.

RAID 5 consists of block-level striping with distributed parity.

RAID 6 uses block level striping with two parity blocks distributed across all disks.

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RAID 0: Disk Striping or non-redundant striping
RAID 1: Disk Mirroring
RAID 2: Memory style error correcting codes
RAID 3: Bit interleaved parity
RAID 4: Block interleaved parity
RAID 5: Block interleaved distributed parity
RAID 6: P+Q redundancy
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