RAID Levels for Highest Fault Tolerance

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Among the given RAID levels, RAID 6 provides the highest fault tolerance.

RAID (redundant array of independent disks) is a data storage technology that combines multiple physical disks into a logical unit to improve performance and data reliability. RAID levels define the configuration of disks, data distribution, and redundancy of data across the disks.

RAID 0, also known as striping, provides the highest performance by splitting data into small blocks and writing them across multiple disks in parallel. However, it does not provide fault tolerance because it does not store any redundant data.

RAID 5 uses block-level striping with distributed parity. It requires a minimum of three disks and can tolerate the failure of one disk without losing any data. If another disk fails before the failed disk is replaced and the array is rebuilt, data loss will occur.

RAID 6 uses block-level striping with double distributed parity. It requires a minimum of four disks and can tolerate the failure of two disks without losing any data. RAID 6 provides higher fault tolerance than RAID 5 because it can withstand the failure of two disks, making it suitable for critical applications.

RAID 10, also known as RAID 1+0, combines disk mirroring (RAID 1) and striping (RAID 0). It requires a minimum of four disks and provides good performance and fault tolerance. RAID 10 can tolerate the failure of one or more disks depending on the distribution of mirrored pairs.

In summary, among the given options, RAID 6 provides the highest fault tolerance as it can tolerate the failure of two disks without losing data.