Hello,

I greatly appreciate if you can you help me understand with explanation the answers to these four questions please. Thank you

An application generates 4200 small random I/Os at peak workloads with a read/write ratio of 2:1.

What is the disk load at peak activity for a RAID 5 configuration?

A. 2,800

B. 5,600

C. 8,400

D. 11,200

Answer: C

An application generates 4200 small random I/Os at peak workloads with a read/write ratio of 2:1.

What is the disk load at peak activity for a RAID 6 configuration?

A. 2,800

B. 5,600

C. 8,400

D. 11,200

Answer: D

An organization plans to deploy a new business application in their environment. The new

application requires 2 TB of storage space. During peak workloads, the application is expected to

generate 9,800 IOPS with a typical I/O size of 4 KB. Because the application is business-critical,

the response time must be within acceptable range.

The available disk drive option is a 15,000 rpm drive with 100 GB capacity. The number of IOPS in

which the disk drive can perform at 100 percent utilization is 140.

What is the number of disk drives needed to meet the application’s capacity and performance

requirements?

A. 20

B. 60

C. 70

D. 100

Answer: D (WHY ISN'T THIS ANSWER, C. 70)

An organization plans to deploy a new business application in their environment. The new

application requires 4 TB of storage space. During peak workloads, the application is expected to

generate 4900 IOPS with a typical I/O size of 8 KB. Because the application is business-critical,

the response time must be within acceptable range.

The available disk drive option is a 10,000 rpm drive with 200 GB capacity. The number of IOPS in

which the disk drive can perform at 100 percent utilization is 140.

What is the number of disk drives needed to meet the application’s capacity and performance

requirements?

A. 20

B. 25

C. 35

D. 50

Answer: D (WHY ISN'T THIS ANSWER, C. 35)

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