EMC Technology Architect E20-326 Questions & Answers

• Question 121:

  What is supported for the second leg (R21 -> R2) of an SRDF Extended Distance Protection (EDP) configuration?

  A. Adaptive copy disk mode

  B. SRDF/Synchronous

  C. SRDF/AR single hop

  D. Adaptive copy write pending mode

  Correct Answer: D

• Question 122:

  An SRDF configuration is running in SRDF/A mode. The customer's decision to switch from SRDF/A to SRDF/S is rejected. At which percentage of write cache in use at the SRDF R2 site will this occur?

  A. 50%

  B. 100%

  C. 80%

  D. 90%

  Correct Answer: A

• Question 123:

  Refer to the exhibit.

  

  A customer has a legacy DMX-3 at Site 1, where a BCV-R1 copy is taken of the production volumes and then replicated to another DMX-3 at Site 2 via SRDF/A. The customer will replace the legacy DMX-3 arrays at both sites with new VMAX arrays.

  The customer wants to enable concurrent SRDF on the Site 1 SRDF source volumes, to maintain disaster restart protection between the legacy DMX-3 arrays and migrate the legacy DMX-3 at Site 1 to the new VMAX array. What should you advise the customer?

  A. Concurrent SRDF migration is not supported for this configuration.

  B. Enable concurrent SRDF using SRDF/A from the BCV-R1.

  C. Host level migration is the only migration option for this configuration.

  D. Enable concurrent SRDF using SRDF/S from the BCV-R1.

  Correct Answer: A

• Question 124:

  What is a feature of Delta Set Extension pools?

  A. An SRDF/A group can be associated with different pools, regardless of protection or emulation type.

  B. DSE pools can be shared between multiple SRDF/A groups.

  C. DSE Pools are only required at the R1 side.

  D. RAID5 with 15krpm disks is recommended for optimal performance of a DSE pool.

  Correct Answer: B

• Question 125:

  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 you recommend?

  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 126:

  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 you recommend?

  A. Use three engine VMAX arrays

  B. Provide more bandwidth

  C. Turn off software compression on the remote adapters

  D. Change the application layout

  Correct Answer: D

• Question 127:

  A colleague implemented cascaded SRDF for a VMAX technology refresh and site relocation activity.

  The colleague reports they shutdown the hosts at production Site A and copied all data to the bunker Site

  B VMAX. But they are unable to enable SRDF/S between Site B and remote Site C.

  What should you advise them?

  A. SRDF/S is not supported on the second leg of a cascaded SRDF implementation.

  B. Enable SRDF/A on the first leg and then enable SRDF/S on the second leg.

  C. Suspend SRDF/S on the first leg and then enable SRDF/S on the second leg.

  D. The Site B devices must be converted to use concurrent SRDF.

  Correct Answer: A

• Question 128:

  A customer is implementing SRDF/S for an application that generates 16000 8K IOPS with 30% writes. A single RDF port can service 1200 8K IOPS. How many RA should be recommended?

  A. 4

  B. 6

  C. 10

  D. 8

  Correct Answer: D

• Question 129:

  A proposed SRDF/S solution was modeled with BCSD. The model assumed that the Source array had 2 RFs.

  The RA utilization chart shows the maximum utilization at 80%. How many RFs should be recommended to ensure a successful implementation?

  A. 2

  B. 4

  C. 3

  D. 6

  Correct Answer: B

• Question 130:

  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 at 70%. How many GigE ports should be recommended to ensure a successful implementation?

  A. 6

  B. 4

  C. 5

  D. 8

  Correct Answer: A