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RAID is among the most popular approaches to parallelism and redundancy in storage systems. The name Redundant Arrays of Inexpensive Disks implies several things about RAID arrays that we will explore in the context of the following activities.
a. High-Performance Mathematical Computations
b. Online Video Services
1. RAID 0 uses striping to force parallel access among many disks. Why does striping improve disk performance? For each of the activities listed in the table, will striping help better achieve their goals?
2. RAID 1 mirrors data among several disks. Assuming that inexpensive disks have lower MTBF than expensive disks, how can redundancy using inexpensive disks result in a system with lower MTBF? Use the mathematical definition of MTBF to explain your answer. For each of the activities listed in the table, will RAID 1 help better achieve their goals?
3. Like RAID 1, RAID 3 provides higher data availability. Explain the trade-off between RAID 1 and RAID 3. Would each of the applications listed in the table benefit from RAID 3 over
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