EMC Technology Architect E20-326 Questions & Answers

• Question 41:

  What are benefits of SRDF/A Multi-Session Consistency?

  A. Consistency of R2 data across devices in multiple SRDF/ A sessions.Coordinated cycle switching of the SRDF/A sessions.

  B. Sessions can be within or across Symmetrix arrays. Allows combining SRDF/S groups and SRDF/A groups.

  C. Coordinated cycle switching of the SRDF/A sessions. "Failure" conditions are detected, so only the session in which the failure occurs will be stopped.

  D. Provides Consistency Group "Trip" processing. "Failure" conditions are detected, so only the session in which the failure occurs will be stopped.

  Correct Answer: A

• Question 42:

  A customer is trying to perform an SRDF/A Consistent Mode Change. The change rejected repeatedly by the secondary array. What could cause this condition?

  A. More than 50% of the SRDF/A write cache on the R2 site is in use

  B. Enginuity versions on both arrays are below 5875

  C. SRDF/A MSC is not configured

  D. The 70% cache write pending limit on the primary array is reached

  Correct Answer: A

• Question 43:

  What is a supported mode combination for disk-based Cascaded SRDF?

  A. First leg - SRDF/S Second leg - SRDF/A

  B. First leg - SRDF/A Second leg - SRDF/A

  C. First leg - SRDF/S Second leg - SRDF Adaptive Copy Write Pending Mode

  D. First leg - SRDF/S Second leg - SRDF/S

  Correct Answer: A

• Question 44:

  You are designing an SRDF/A solution with Symmetrix VMAX 40K arrays. TimeFinder/Snap will be used to replicate the remote devices.

  What is a design consideration?

  A. Device Write Pacing should be enabled

  B. Group Write Pacing should be enabled

  C. Delta Set Extension should be implemented

  D. Transmit Idle should be enabled

  Correct Answer: A

• Question 45:

  You are designing an SRDF/A DSE solution. The production application is expected to generate approximately 1500 4 KB write operations every second. The DSE pool will have RAID 5 (3+1) devices residing on 600 GB 15K RPM FC disks.

  What is the estimated number of disks required for DSE?

  A. 60

  B. 100

  C. 160

  D. 200

  Correct Answer: B

• Question 46:

  A proposed SRDF/S solution was modeled with BCSD using host-based data. The BCSD model assumed two-engine VMAX arrays with SRDF Fibre ports. The Compressed Throughput chart shows that the available throughput is greater than the peak throughput. The Volume Exceptions table lists ten devices.

  What should be recommended?

  A. Change the application layout

  B. Use three-engine VMAX arrays

  C. Provide more bandwidth

  D. Turn off software compression on the remote adapters

  Correct Answer: A

• Question 47:

  A proposed SRDF/S solution was modeled with BCSD. The model assumed that the source array had 4 GigE ports. The RA Utilization chart shows the maximum utilization is at 70%.

  How many GigE ports should be recommended to ensure a successful implementation?

  A. 4

  B. 5

  C. 6

  D. 8

  Correct Answer: C

• Question 48:

  A proposed SRDF/S solution was modeled with BCSD using host-based data. The BCSD model assumed two-engine VMAX arrays with SRDF Fibre ports. The RA Utilization chart shows a maximum utilization of 45%. The Volume Exceptions table lists five devices.

  What should be recommended?

  A. Change the application layout

  B. Add more remote adapters

  C. Use three-engine VMAX arrays

  D. Turn on software compression on the remote adapters

  Correct Answer: A

• Question 49:

  You have used BCSD to model an SRDF/S solution. What information can be obtained from the model?

  A. Bandwidth requirement, RA utilization, and volume exceptions

  B. RA utilization, DA and cache utilization, and host service time

  C. Cache utilization, RA utilization, and potential problem volumes

  D. Bandwidth requirement, RA utilization, and network latency

  Correct Answer: A

• Question 50:

  An SRDF/S design analysis was performed with BCSD. The Volume Exception tab in BCSD has identified several volumes.

  What is a reason for this issue?

  A. Acceptable volume write limits have been exceeded

  B. Inadequate bandwidth

  C. Acceptable write pending limits have been exceeded

  D. Unknown limits have been exceeded, further investigation is required

  Correct Answer: A