A server administrator wants to ensure a storage array can survive the failure of two drives without the loss of data. Which of the following RAID levels should the administrator choose?
RAID 6 extends RAID 5 by adding another parity block, resulting in two parity blocks per data stripe. This means it can withstand the failure of up to TWO DRIVES within the array without losing data. This is its most significant advantage over most other RAID levels, providing a higher level of data security.
To ensure a storage array can survive the failure of two drives without losing data, the server administrator should choose RAID 6. RAID 6 provides two levels of parity protection, which means that data can be reconstructed even if two drives fail simultaneously. This is achieved by storing two sets of parity data across all drives in the array, which allows the array to survive multiple drive failures while maintaining data integrity.
RAID 0 does not provide any redundancy and does not protect against drive failures. RAID 1 provides mirroring of data between two drives, but it only protects against the failure of a single drive. RAID 5 provides a single level of parity protection, which allows the array to survive a single drive failure, but not two failures.
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