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RAID 60, also called as RAID 6+0, is a type of nested redundant array of independent disk level that incorporate the block-level stripping feature of RAID 0 with the dual parity of RAID 6. Similar to RAID 6, it too has the multi-level disk set but supports more drives.

RAID 60 supports dual disk failure, and requires at least eight disks or a set of four-disk RAID 6 sets to be implemented on. Like RAID 6, RAID 60 too can continue operations even if it loses two disks in a parity set (parity set of 4 disks each). Since RAID 60 has to write more than any other RAID levels, write performance slows down; however, it offers better utilization.

RAID 60 eats up more disk space for parity information as it creates multiple sets of parity information on each block.

Key characteristics of RAID 60

• Redundant information (parity) is alternately stored on all disks of each RAID 6 span.

• Provides better read performance, but sluggish write performance.

• Increased redundancy provides greater data protection than a RAID 50 level.

• It requires proportionally as much parity information as RAID 6 level.

• Two disks per span are required for parity.

• It is more expensive in terms of disk space.

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