An administrator needs to maintain 1TB of storage for mission critical application data. Fault tolerance and performance are the most important considerations. Cost is not a factor at all. Which of th

RAID 6 provides good fault tolerance (two drive failures), but its write performance is generally lower than RAID 10 due to the overhead of calculating and writing two parity blocks.

RAID 10 (RAID 1+0) provides excellent fault tolerance by mirroring data and then striping across the mirrored sets, while also offering superior read and write performance compared to other fault-tolerant RAID levels due to parallel I/O operations and no complex parity calculations during writes. Eight 250GB drives provide (8/2) * 250GB = 1TB of usable storage, meeting the capacity requirement.

RAID 5 provides fault tolerance against a single drive failure, which may not be sufficient for 'mission critical' applications where higher availability is desired, and its write performance is also impacted by parity calculations.

RAID 0 offers excellent performance but provides no fault tolerance whatsoever, meaning a single drive failure results in complete data loss, making it unsuitable for 'mission critical' data.