Which RAID level provides double parity to tolerate two disk failures?

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Multiple Choice

Which RAID level provides double parity to tolerate two disk failures?

Explanation:
Two independent parity blocks across the disks enable you to survive two failures. That’s what RAID 6 does. It stripes data across all drives and adds two parity values (often called p and q) so that even if two disks fail, the remaining data plus those two parity blocks can be used to reconstruct everything. The result is fault tolerance for two concurrent disk failures, at the cost of extra overhead and needs at least four disks. Other levels either have no redundancy (RAID 0) or redundancy with only a single parity or mirroring (RAID 5 and RAID 1), which can tolerate only one disk failure.

Two independent parity blocks across the disks enable you to survive two failures. That’s what RAID 6 does. It stripes data across all drives and adds two parity values (often called p and q) so that even if two disks fail, the remaining data plus those two parity blocks can be used to reconstruct everything. The result is fault tolerance for two concurrent disk failures, at the cost of extra overhead and needs at least four disks. Other levels either have no redundancy (RAID 0) or redundancy with only a single parity or mirroring (RAID 5 and RAID 1), which can tolerate only one disk failure.

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