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A company plans to deploy a new application in their environment. The new application requires 5 TB of storage space. During peak workloads, the application is expected to generate 3000 IOPS with a typical I/O size of 3 KB. The capacity of each available disk drive is 750 GB. In addition, the maximum number of IOPS a drive can perform at with a 70% utilization is 90 IOPS. What is the minimum number of disk drives needed to meet the application's capacity and performance requirements for a RAID 0 configuration?
Correct Answer: B
* Capacity Requirement: 5 TB = 5000 GB * Disk Capacity: 750 GB * Number of Disks for Capacity:Capacity Disks=5000750=7 disksCapacity Disks=7505000=7 disks * Performance Requirement: 3000 IOPS * Disk IOPS: 90 IOPS (at 70% utilization) * Number of Disks for Performance :Performance Disks=300090=34 disksPerformance Disks=903000=34 disks * Final Number of Disks: The higher of the two values is needed, which is 34 disks. References: Dell ISM V5 Course, Module on Performance and Capacity Planning.