EMC E20-326 Online Practice Questions and Exam Preparation

EMC E20-326 Online Questions & Answers

• Question 71:

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

• Question 72:

  The SiRT feature is enabled on the RA in an SRDF/S configuration. When does the host receive the acknowledgement of a write?

  A. When I/O is written to the cache at the R2 site and acknowledgement is received by the R1 site from R2 site
  B. When I/O is written to R2 site cache but not acknowledged yet
  C. When I/O is written at R1 site cache and sent to the R2 site
  D. Immediately after the I/O is written to R1 cache
  B. When I/O is written to R2 site cache but not acknowledged yet

• Question 73:

  A customer has purchased a new VMAX and is in the process of setting up Open Replicator for a migration. What is a consideration for device pairing for the migration?

  A. New devices must be of the same RAID type.
  B. New Device must be the same size or smaller.
  C. New Device must be of the same Meta Configuration.
  D. New device must be the same size or larger.
  D. New device must be the same size or larger.

• Question 74:

  What is the impact on response time when multiple concurrent writes to an RDF device arrive from different FA ports on a Symmetrix VMAX?

  A. Concurrent SRDF/S writes will not help to improve response time.
  B. Writes can run in parallel and response time is slightly improved.
  C. Writes need to be finished before new writes arrive and negatively impacts response time.
  D. Response time is mostly determined by the application write behavior.
  B. Writes can run in parallel and response time is slightly improved.

• Question 75:

  You are working for a customer as an architect, designing a new Symmetrix VMAX to replace multiple DMX arrays. Which tool should be used to design system components based on workload?

  A. SymmMerge
  B. SMC
  C. Solutions Enabler
  D. Unisphere Analyzer
  A. SymmMerge

• Question 76:

  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
  A. Change the application layout

• Question 77:

  What is the maximum recommended distance for an SRDF/S over CWDM deployment?

  A. 50 km
  B. 100 km
  C. 150 km
  D. 200 km
  B. 100 km

• Question 78:

  You are designing a Symmetrix VMAX SRDF/S over Fibre Channel solution. The production and remote data centers are 50 kilometers apart. What is the expected write response time delay due to latency?

  A. 0.5 ms
  B. 0.25 ms
  C. 1 ms
  D. 2 ms
  A. 0.5 ms

• Question 79:

  What is a valid FAST policy?

  A. EFD 400GB RAID 5 (3+1) -30% FC 15K 300GB RAID 1 - 30% SATA 7200 1TB RAID 6 (6+2) - 30%
  B. EFD 400GB RAID 5 (3+1) -30% FC 15K 300GB RAID 1 - 30% FC 15K 400 GB RAID 5 (3+1) - 20% SATA 7200 1TB RAID 6 (6+2) - 30%
  C. EFD 400GB RAID 5 (3+1) -10% FC 15K 300GB RAID 1 - 50% SATA 7200 1TB RAID 6 (6+2) - 20%
  D. EFD 400GB RAID 5 (3+1) -10% FC 15K 300GB RAID 1 - 100% SATA 7200 1TB RAID 6 (6+2) - 100%
  D. EFD 400GB RAID 5 (3+1) -10% FC 15K 300GB RAID 1 - 100% SATA 7200 1TB RAID 6 (6+2) - 100%

• Question 80:

  What are the generally recommended RAID protections for Enterprise Flash Drives (EFD), Fibre Channel (FC) and Serial Advanced Technology Attachment (SATA) tiers?

  A. EFD - RAID 5 (3+1) FC - RAID 1 SATA - RAID 6(6+2)
  B. EFD - RAID 1 FC - RAID 5 (3+1) SATA RAID 6 (6+2)
  C. EFD - RAID 6 (6+2) FC - RAID 1 SATA RAID 5 (3+1)
  D. EFD - RAID 6 (6+2) FC - RAID 5 (3+1) SATA RAID 1
  A. EFD - RAID 5 (3+1) FC - RAID 1 SATA - RAID 6(6+2)