EMC E20-326 Online Practice Questions and Exam Preparation

EMC E20-326 Online Questions & Answers

• Question 141:

  A customer is facing intermittent outages on their SRDF/A link. Typically, an outage does not last for more than 5 minutes. The storage administrator is planning to configure transmit idle along with the DSE. Applications on the production VMAX generate approximately 1500 write operations every second. Assuming that all writes are 128KB in size, how much disk space is required in the DSE pool?

  A. 45GB
  B. 55GB
  C. 65GB
  D. 80GB
  B. 55GB

• Question 142:

  Which TimeFinder feature allows you to use TimeFinder/Mirror commands to perform operations on RAID 6 protected BCVs?

  A. TimeFinder/Clone emulation mode
  B. TimeFinder/Mirror compatibility mode
  C. TimeFinder/Clone compatibility mode
  D. Symmetrix Differential Data Facility
  D. Symmetrix Differential Data Facility

• Question 143:

  A customer has several internal organizational units with very different requirements for their unique lines of business applications. Which approach provides the most optimal system performance?

  A. Continue to distribute the BCV/Clones/Pools across the front end, back end, engines, and disk.
  B. Segregate the BCV/Clones/Pools across the front end, back end, and engines to optimize each workload on its allocation of system elements.
  C. Continue to distribute the BCV/Clones/Pools across the front end, back end, engines, and disk only if the workloads are highly concurrent.
  D. Segregate the BCV/Clones/Pools across the front end, back end, and engines if the workloads are highly concurrent.
  A. Continue to distribute the BCV/Clones/Pools across the front end, back end, engines, and disk.

• Question 144:

  For which IO sizes is the SiRT feature enabled on Symmetrix VMAX arrays?

  A. All IO sizes
  B. 8 KB and lower
  C. 16 KB and lower
  D. 32 KB and lower
  A. All IO sizes

• Question 145:

  What is the size of a thin device extent in a Symmetrix VMAX?

  A. 768 KB
  B. 512 KB
  C. 64 KB
  D. 1024 KB
  A. 768 KB

• Question 146:

  What is a valid action when a Symmetrix VMAX thin pool is nearly full?

  A. Add new data devices and rebalance
  B. Limit the oversubscription ratio
  C. Initiate a "pool full" warning for the pool
  D. Examine the pool ingress and egress rates
  A. Add new data devices and rebalance

• Question 147:

  What is the main benefit of SRDF/A Delta Set Extension?

  A. Augments cache-based Delta Sets with disk-based buffering
  B. Extends changed blocks into cache for faster resyncs
  C. Extends SRFD/A to geo distances by moving data at a more granular level
  D. Extends cache-based Delta Set buffering to the local cache of the host
  A. Augments cache-based Delta Sets with disk-based buffering

• Question 148:

  A customer has a pair of VMAX arrays configured to replicate thin devices at one site to thin devices at another site using SRDF/A. The customer wants to implement TimeFinder/Snap replication of the R2 device on the target array and asks you to confirm this is a supported configuration. What do you advise the customer?

  A. No, it is not supported.
  B. It is supported only if the precopy option is used.
  C. Yes, it is supported.
  D. It is supported only if composite groups are used.
  B. It is supported only if the precopy option is used.

• Question 149:

  You are designing an SRDF over GigE solution. What is a consideration to maximize TCP connection scaling?

  A. All GigE ports on the source array should be able to see all GigE ports on the target array.
  B. The MTU size must be hard set in the bin file on both the source and target arrays.
  C. The speed limit should be set on all GigE ports on both the source and target arrays.
  D. Jumbo frames must be enabled on the all GigE ports on both the source and target arrays.
  A. All GigE ports on the source array should be able to see all GigE ports on the target array.

• Question 150:

  Your customer is interested in using Timefinder/Snap. You have determined there needs to be fifty save devices to handle the change rate for 125 virtual devices. The Save devices and the virtual devices are the same size. What should be recommended if source volume performance is a consideration?

  A. Recommend using Timefinder/Clone
  B. Spread the Save devices across as many DAs and disks as possible
  C. Recommend using RAID6 for the Save devices
  D. Allocate enough disks to handle the change rate
  A. Recommend using Timefinder/Clone