EMC E20-885 Online Practice Questions and Exam Preparation

EMC E20-885 Online Questions & Answers

• Question 101:

  A customer runs Oracle using DAS. They observe intermittent Oracle performance degradation due to data hot spots on the disks. You propose they move Oracle to an EMC VNX with RAID 1/0 LUNs. If the customer implements the proposed configuration, how would Oracle ASM alleviate the customer's hot spots?

  A. The ASM disk group will re-balance all existing Oracle objects automatically.
  B. The Unisphere Agent installed on the Oracle server will re-balance all existing Oracle objects automatically.
  C. ASM will re-stripe the data avoiding the target MirrorView volume hot spots.
  D. ASM with Unisphere will re-stripe the data avoiding the source MirrorView volume hot spots.
  A. The ASM disk group will re-balance all existing Oracle objects automatically.

• Question 102:

  A customer currently has a RP/SE single cluster system. They want to add an additional VNX array for replication. The business requires replication from the existing VNX to the new one. How would they best implement this configuration?

  A. Purchase an additional RP/SE cluster. Install it using Deployment Manager, and then connect it to the existing cluster.
  B. Purchase an additional RP/SE license for the new VNX. Add the VNX to the existing cluster using Deployment Manager.
  C. Zone the new VNX FC ports to the existing RPA ports. Create new Consistency Groups using Unisphere for RecoverPoint.
  D. Connect the VNX to the existing SAN. Connect the new array to the existing cluster using Deployment Manager.
  A. Purchase an additional RP/SE cluster. Install it using Deployment Manager, and then connect it to the existing cluster.

• Question 103:

  A customer wants to convert a RP/SE cluster to RP/EX.

  What must be done after completing the upgrade using the Deployment Manager wizard?

  A. Addition of new license(s)
  B. SAN diagnostic checks
  C. vRPA version must be checked
  D. All GUIs must be closed
  A. Addition of new license(s)

• Question 104:

  You are implementing FAST Cache. You want to disable FAST Cache on any LUNs that do not have the correct I/O access pattern for FAST Cache. All LUNs are 4+1 R5, with sizes between 50 GB and 500 GB. Which answer shows an access pattern that should benefit from FAST Cache?

  A

• Question 105:

  A customer is using VNX Replicator to replicate data from a single file system to a remote location. They are planning to replicate more file systems, but monitoring tools are showing bursts of data on the link instead of a smooth and constant flow of data. They also notice that latency on the link is higher than expected.

  What would you advise them to do to make more efficient use of the link?

  A. Use multiple network interfaces for the Data Mover interconnects
  B. Use Unisphere QoS Manager to throttle bandwidth for Replicator
  C. Set the TCP fast timer to 500 ms
  D. Set the TCP slow timer to 200 ms
  A. Use multiple network interfaces for the Data Mover interconnects

• Question 106:

  A SAN administrator creates a SAN Copy session between two EMC VNX using Navisphere Secure CLI for a single database LUN. The session starts copying but fails to complete. What is the most likely cause of this failure?

  A. The destination LUN is smaller than the source LUN.
  B. A host has mounted the LUN on the destination VNX.
  C. LUN masking has not been completed.
  D. Zoning between the two VNX is incorrect.
  A. The destination LUN is smaller than the source LUN.

• Question 107:

  A customer has two sites, with a VNX system at each site. The local site has four application LUNs of 256 GB each. They are replicated to the remote site with MirrorView/S. The link between the sites has an effective bandwidth of 100 MB/s. The application generates 800 random IOPS of 8 kB with a 3:1 R/W ratio on each of the LUNs. The link fails for 15 minutes.

  How much data is copied to the secondary LUNs as part of the resynchronization process?

  A. 1.4 GB
  B. 22 GB
  C. 44 GB
  D. 88 GB
  D. 88 GB

• Question 108:

  An EMC VNX supports several iSCSI Windows hosts, as well as a home directory structure for fifty CIFS clients. The iSCSI hosts run an application with an I/O pattern that is 80% writes with a 2 MB I/O size. The customer reports overall write performance is less than expected. Your examination of the VNX reveals frequent forced flushing. Which recommendation is most likely to improve performance for the home directory clients?

  A. Increase the high watermark to 90%
  B. Change the write-aside value to 1023 KB
  C. Use a pre-fetch multiplier greater than the segment multiplier
  D. Split the iSCSI and file workloads to different LUNs
  B. Change the write-aside value to 1023 KB

• Question 109:

  A customer wants to reduce the performance impact incremental SAN Copy (ISC) has on their source LUN. They plan to use a clone between the current source and destination LUNs, and then use the fractured clone as the new ISC source LUN. The source LUN performs two hundred 4 KB random I/O per second, with a 1:1 read/write ratio.

  The source LUN is 768 GB in size, and the clone will be fractured for five minutes. How much data will be copied to the destination LUN?

  A. 11,250 MB
  B. 22,500 MB
  C. 1,125 MB
  D. 4,800 MB
  A. 11,250 MB

• Question 110:

  Click on the calculator in the upper left-hand corner.

  A customer implemented VNX Replicator in an all-Windows client environment. The customer plans to add fifteen additional VNX-based CIFS servers to the environment. The customer requires the highest level of server portability. How much disk space would be required to add the servers to the source site?

  A. 1920 MB + 300 GB
  B. 128 MB + 20 GB
  C. 3840 MB + 600 GB
  D. 256 MB + 40 GB
  A. 1920 MB + 300 GB