Which of the following RAID levels can withstand the simultaneous loss of two physical drives in an array?
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A. B. C. D.D.
The correct answer is D. RAID 10.
RAID (Redundant Array of Independent Disks) is a technology that allows multiple physical disks to be combined into a single logical unit. RAID provides various levels or configurations to protect data from disk failures, improve performance, and increase storage capacity.
The RAID levels commonly used are RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10. Each RAID level has its own characteristics and advantages.
RAID 0 is not a fault-tolerant configuration and does not provide any data redundancy. If a single disk fails, the entire array will fail, and all data will be lost.
RAID 3 uses parity to provide fault tolerance. However, it can only withstand the loss of a single disk in the array.
RAID 5 also uses parity to provide fault tolerance, but it can withstand the loss of only one disk in the array.
RAID 10, also known as RAID 1+0, is a combination of RAID 1 (mirroring) and RAID 0 (striping). It provides both performance and fault tolerance. In a RAID 10 configuration, data is mirrored across multiple disks and then striped across those mirrors. As a result, RAID 10 can withstand the loss of up to half of the physical disks in the array.
Therefore, RAID 10 is the only RAID level among the given options that can withstand the simultaneous loss of two physical drives in an array.