EMC Technology Architect E20-880 Questions & Answers

• Question 111:

  Which function of MCC allows cache to dynamically react to workload changes?

  A. cache page aging

  B. watermark flushing

  C. forced flushing

  D. adjustable watermarks

  Correct Answer: A

• Question 112:

  When designing a VNX solution, which metric should be used to measure the time a component is busy servicing requests?

  A. Utilization

  B. Queue Length

  C. Response Time

  D. Seek Time

  Correct Answer: A

• Question 113:

  Refer to the exhibit.

  

  What is true of the I/O access pattern after 16:10?

  A. Reads are satisfied from cache

  B. Write coalescing is occurring

  C. Disk seek distances are high

  D. Disk queue lengths are high

  Correct Answer: A

• Question 114:

  Refer to the exhibit.

  

  You are proposing a storage solution using VNX to support a Microsoft Exchange 2010 virtual implementation on VMware ESXi. You have worked with the customer to understand the Exchange requirements, which are described in the exhibit. Based on availability, performance, and Exchange mailbox size requirements, you are recommending RAID 5 with 7.2K rpm NL/SAS drives.

  Following EMC best practices, what is the minimum number of spindles that would be required for this environment?

  A. 16

  B. 26

  C. 34

  D. 48

  Correct Answer: B

• Question 115:

  What can be concluded from the exhibit about the I/O profile of LUN 600?

  A. Read access is random.

  B. I/Os are too big for prefetch.

  C. Read access is sequential.

  D. Reads are being prefetched.

  Correct Answer: A

• Question 116:

  Refer to the exhibit.

  

  A customer has three SAS DAEs configured with eight 4+1 RAID 5 Groups (RG) and six Hot Spares. All RGs are unused except for RG 0, which contains the Control LUNs. All LUNs except for those in RG 0 are the same size. Which dvols will be selected for the second file system creation using Automatic Volume Management System-defined pools?

  A. dvols d9, d14, d16, and d18

  B. dvols d11, d13, d20, and d22

  C. dvols d12, d14, d17, and d21

  D. dvols d9, d10, d16, and d18

  Correct Answer: A

• Question 117:

  Refer to the exhibit.

  

  A customer is seeking insight about the data access profile on LUN 500, and has provided you the output shown in the exhibit. The Average Seek Distance (GB) parameter from Unisphere Analyzer shows a high value relative to the size of the disks that make up the RAID Group on which LUN 500 resides.

  What can you determine about the data access profile of LUN 500?

  A. It is indeterminate

  B. It is random

  C. It is sequential

  D. It is highly variable

  Correct Answer: A

• Question 118:

  Refer to the exhibit.

  

  A customer has three SAS DAEs configured with eight 4+1 RAID 5 Groups (RG) and six Hot Spares as shown in the exhibit. All RGs are unused except for RG 0, which contains the Control LUNs. All LUNs except for those in RG 0 are the same size.

  Which dvols will be selected for file system creation using Automatic Volume Management System-defined pools?

  A. dvols 11, 13, 20, and 22

  B. dvols 9, 12, 14, and 18

  C. dvols 7, 11, 17, and 25

  D. dvols 9, 10, 11, and 12

  Correct Answer: A

• Question 119:

  Refer to the exhibit.

  

  A junior architect on your team has asked for your assistance in analyzing performance metrics from a customer's array. You have been provided with the exhibit, which depicts two devices and their associated workloads.

  Which answer best describes what is occurring?

  A. Saturation

  B. Burstiness

  C. Sequential I/O

  D. Random I/O

  Correct Answer: A

• Question 120:

  Refer to the exhibit,

  

  You are proposing a storage solution using VNX to support a Microsoft Exchange 2010 virtual implementation on Microsoft Hyper-V. You have worked with the customer to understand the Exchange requirements, which are described in the exhibit. Based on availability, performance, and Exchange mailbox size requirements, you are recommending RAID 5 with 7.2K rpm NL/SAS disks.

  Following EMC best practices, what is the minimum number of spindles required for this environment?

  A. 14

  B. 18

  C. 27

  D. 37

  Correct Answer: C