Which RAID level provides double parity to tolerate two simultaneous drive failures?

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Multiple Choice

Which RAID level provides double parity to tolerate two simultaneous drive failures?

Explanation:
Double parity is a redundancy method that lets a storage array survive two disk failures. In RAID 6, two independent parity blocks are stored across all the drives. If any two drives fail, you can still reconstruct their data from the remaining drives and the two parity blocks. This is why RAID 6 is able to tolerate two simultaneous drive failures. Other options don’t offer this level of fault tolerance. RAID 0 has no redundancy at all, so a single drive failure loses all data. RAID 5 uses just one parity block distributed across the disks, so it can handle only one failure. RAID 1 mirrors data to another drive, giving redundancy against a single drive failure, but it doesn’t provide the two-failure tolerance that comes with double parity in RAID 6.

Double parity is a redundancy method that lets a storage array survive two disk failures. In RAID 6, two independent parity blocks are stored across all the drives. If any two drives fail, you can still reconstruct their data from the remaining drives and the two parity blocks. This is why RAID 6 is able to tolerate two simultaneous drive failures.

Other options don’t offer this level of fault tolerance. RAID 0 has no redundancy at all, so a single drive failure loses all data. RAID 5 uses just one parity block distributed across the disks, so it can handle only one failure. RAID 1 mirrors data to another drive, giving redundancy against a single drive failure, but it doesn’t provide the two-failure tolerance that comes with double parity in RAID 6.

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