EMC E20-326 Online Practice Questions and Exam Preparation

EMC E20-326 Online Questions & Answers

• Question 131:

  An existing TimeFinder customer migrated from a DMX-3 running Enginuity 5771 to a new VMAX array. A colleague advised them TimeFinder/Clone performance would improve on the VMAX due to changes to the Copy on First Write

  (COFW) mechanism. The customer asks you to explain how the COFW mechanism changed on the VMAX.

  What do you advise the customer?

  A. Uses asynchronous copy on first write (ACOFW), which has no COFW penalty.
  B. Uses synchronous copy on first write (COFW), which has no COFW penalty.
  C. Uses asynchronous copy on first write (ACOFW), which holds protected writes in cache.
  D. Uses synchronous copy on first write (COFW), which completes protected writes in cache.
  A. Uses asynchronous copy on first write (ACOFW), which has no COFW penalty.

• Question 132:

  Refer to the exhibit.

  

  You are considering potential configurations of a new storage system. You need to make decisions that consider different cost-benefit ratios. Which policy applied to the workload provides the minimum expenditure?

  A. Heavy Skew
  B. Moderate Skew
  C. Low Skew
  D. Default Skew
  A. Heavy Skew

• Question 133:

  A customer asked you to design a storage solution for their new call center application. This is a new EMC customer and they do not have any existing storage infrastructure. Before you begin to design a solution, you request that the customer collect some host-based performance metrics. When and how should the customer collect performance metrics?

  A. During peak workloads in small intervals
  B. During peak workloads in large intervals
  C. During normal workloads in small intervals
  D. During normal workloads in large intervals
  A. During peak workloads in small intervals

• Question 134:

  What is a Capacity Available for Active Replication (CAAR) consideration when using TimeFinder on a Symmetrix VMAX?

  A. TimeFinder VP Snap requires 2X protection slots for source and 1X protection slots for up to 16 targets
  B. TimeFinder/Snap requires protection slots for both source and target
  C. TimeFinder/Snap source requires 2X the protection slots of the target
  D. TimeFinder VP Snap requires 2X protection slots for both source and target for up to 32 targets
  A. TimeFinder VP Snap requires 2X protection slots for source and 1X protection slots for up to 16 targets

• Question 135:

  You are designing an SRDF/S solution. The workload profile is:

  

  Total I/Os per second = 10000

  

  Write % = 25

  

  Read block size = 8 KB

  

  Write block size = 8 KB

  Network bandwidth can be purchased in increments of single T3 (45 Mb/s) links. Data compression is not in use. How many T3s links would you recommend?

  A. 6
  B. 2
  C. 4
  D. 8
  A. 6

• Question 136:

  What is considered to be a thin unfriendly environment?

  A. an environment that makes use of filesystems that append data instead of re-using free space.
  B. an environment that contains databases that make use of the auto-extend capability.
  C. an environment that is used for media and document repositories.
  D. an environment that is used by Test Development and Quality Assurance.
  A. an environment that makes use of filesystems that append data instead of re-using free space.

• Question 137:

  A company plans to deploy Symmetrix VMAX arrays in their VMware vSphere environment. The ESXi hosts will be connected to the VMAX arrays over a FC SAN. Which VMAX FA port flag is optional?

  A. SCSI Support
  B. SPC-2
  C. Unique worldwide name (UWN)
  D. Common Serial Number (C)
  A. SCSI Support

• Question 138:

  When designing SRDF/A, what is the recommended configuration for the DSE pool?

  A. RAID-5 devices spread out over few disks
  B. RAID-1 devices on dedicated disks
  C. RAID-6 devices on dedicated disks
  D. RAID-1 devices spread out over many disks
  D. RAID-1 devices spread out over many disks

• Question 139:

  A customer plans to aggregate a number of CLARiiONs to a Symmetrix VMAX with FAST VP. Which data collection requirements are recommended for a Tier Advisor analysis?

  A. Minimum 5 hour NAR and trace data collection with both NAR and trace data collected at 2 minute intervals.
  B. Trace data for 30 minutes each hour of NAR capture.Minimum 8 hour NAR data collection at 10 minute intervals for coarse data analysis.
  C. Trace data at 1 minute intervals for detailed peak data capture.Maximum 24 hour NAR and trace capture at default 10 minute intervals to enable peak analysis on a daily basis.
  D. Minimum 5 day NAR with default data collection interval of 10 minutes.Partial trace data for 30 minutes each hour of NAR capture.
  A. Minimum 5 hour NAR and trace data collection with both NAR and trace data collected at 2 minute intervals.

• Question 140:

  What is the maximum number of wavelengths that can be multiplexed on a single optical fiber over CWDM?

  A. 8
  B. 16
  C. 32
  D. 160
  B. 16