EMC Technology Architect E20-545 Questions & Answers

• Question 151:

  In Unisphere Analyzer, what are two possible views when you right-click a RAID group?

  A. LUN I/O Disk Detail and Performance Detail

  B. Performance Detail and I/O Size Distribution Summary

  C. LUN I/O Disk Detail and I/O Size Distribution Detail

  D. Performance Detail and I/O Size Distribution Detail

  Correct Answer: A

• Question 152:

  What is the best way to set up a FAST VP pool on a VNX Block system running VNX OE for Block (v31)?

  A. Five Flash disks in RAID 5 (4+1); five SAS disks in RAID 5 (4+1); six NL-SAS disks in RAID 6 (4+2).

  B. Five Flash disks in RAID 5 (4+1); six SAS disks in RAID 6 (4+2); six NL-SAS disks in RAID 6 (4+2).

  C. Five Flash disks in RAID 5 (4+1); five SAS disks in RAID 5 (4+1); eight NL-SAS disks in RAID 6 (6+2).

  D. Five Flash disks in RAID 5 (4+1); five SAS disks in RAID 5 (4+1); five NL-SAS disks in RAID 5 (4+1).

  Correct Answer: D

• Question 153:

  Refer to the exhibit.

  

  This VNX has the disks shown in the front view. They are all 300 GB 10K disks.

  What is the maximum number of drives that you can add to a new RAID group in this situation?

  A. 16

  B. 15

  C. 30

  D. 26

  Correct Answer: A

• Question 154:

  Refer to the exhibit.

  

  The array has only the disks shown on the exhibit. All disks in the array are 600 GB 15K drives. One disk is used as a hot spare.

  What is the maximum number of disks you can add to a single pool?

  A. 25

  B. 29

  C. 24

  D. 16

  Correct Answer: A

• Question 155:

  Refer to the exhibit.

  

  The Unisphere Analyzer data shows all disks in a VNX. Using EMC best practices, what would be the best way of allocating storage from the unbound disks?

  A. RAID 5 (4+1) group with 300 GB SAS disks and one hot spare

  B. RAID 5 (5+1) group with 300 GB SAS disks and one hot spare

  C. RAID 5 (5+1) group with 300 GB SAS disks and no hot spare

  D. RAID 5 (4+1) group with 300 GB SAS disks and no hot spare

  Correct Answer: D

• Question 156:

  A customer has reported degraded performance with several of the applications that run on a VNX. After going through the performance data on the array, you find that all the performance issues are centered around the same RAID 6 group, and that the RAID group is supplying 50 percent less IOPS than before.

  What is the most likely reason?

  A. The RAID group is being rebuilt.

  B. The RAID group is trespassed.

  C. Write cache is not configured.

  D. The RAID group is being defragmented.

  Correct Answer: A

• Question 157:

  What is the default cache page size in KB on a VNX?

  A. 8

  B. 16

  C. 2

  D. 4

  Correct Answer: A

• Question 158:

  When setting up QoS for a host's LUNs, what software must be loaded on the host system?

  A. None

  B. Navisphere Host Agent

  C. Navisphere Secure CLI

  D. Server utility

  Correct Answer: A

• Question 159:

  A customer system has the watermark processing disabled. To which value will the low water mark (LWM) default?

  A. 60%

  B. 50%

  C. 100%

  D. 0%

  Correct Answer: C

• Question 160:

  A customer has implemented Unisphere Quality of Service to ensure that an application obtains the resources necessary to meet the required service level based on a consistent IOPS level. However, when the storage administrator reviewed performance of the application, the IOPS were variable and lower than expected. Other applications are receiving exactly the resources defined through the performance policies. What might be the problem?

  A. The cruise control is within its learning period.

  B. TheUnisphereQoS control engine did not start.

  C. The queue depth was set improperly.

  D. The IOPS limit for the application was set too high.

  Correct Answer: A