EMC E20-885 Online Practice Questions and Exam Preparation

EMC E20-885 Online Questions & Answers

• Question 181:

  A customer has a CIFS DR solution with EMC VNX using a One-to-Many replication topology. The customer asks you to explain replication behavior under the following conditions:

  ?Production site failover or switchover to a DR site ?Replication start and reverse is performed

  What would you advise the customer?

  A. The original production site remains a One-to-Many replication source for the other remaining DR sites.
  B. All remaining replications sessions to the other DR sites are suspended.
  C. The original production site goes into cascade mode to remain a replication source for the remaining DR sites.
  D. The DR site becomes the replication source for the remaining DR sites and the original production site is marked as invalid.
  C. The original production site goes into cascade mode to remain a replication source for the remaining DR sites.

• Question 182:

  A customer has a Windows-only environment connected to a Celerra gateway utilizing Symmetrix storage at their main campus site. The customer plans to install a new EMC VNX at their remote site and implement a DR solution for their Celerra. The customer requires several thin-provisioned file systems be shared and available to clients via CIFS and wants to implement VDMs. Which solution do you recommend to the customer?

  A. Use VNX Replicator to replicate the Celerra VDMs and associated file systems from the main campus site to the VNX at the remote site to provide an asynchronous DR solution.
  B. Use VNX Replicator to replicate the Celerra VDMs and associated file systems from the main campus site to the VNX at the remote site to provide a synchronous DR solution.
  C. Use VNX SAN Copy to replicate the Symmetrix devices associated with the Celerra file systems from the main campus site to the VNX at the remote site to provide a synchronous DR solution.
  D. Use SRDF/A to replicate the Symmetrix devices associated with the Celerra file systems from the main campus site to the VNX at the remote site to provide an asynchronous DR solution.
  A. Use VNX Replicator to replicate the Celerra VDMs and associated file systems from the main campus site to the VNX at the remote site to provide an asynchronous DR solution.

• Question 183:

  Which feature allows you to enable data access and create storage groups on a VNX array?

  A. Access Logix
  B. LUN Mapping
  C. LDAP
  D. SP Cache
  C. LDAP

• Question 184:

  How do primary and standby Control Stations monitor each other?

  A. nasmcd
  B. nbsnas
  C. ConnectHome
  D. nasdb
  C. ConnectHome

• Question 185:

  A customer has successfully set up a MirrorView/A connection between two VNX arrays. After selecting a traditional LUN as the primary image LUN, the user receives an error when trying to add a secondary thin LUN image. What must the customer do to correct this problem?

  A. Add LUNs to the RLP on the secondary array.
  B. Create a Secondary Image with a traditional LUN.
  C. Add LUNs to the RLP LUN on the primary array.
  D. Configure the WIL LUN on both arrays.
  A. Add LUNs to the RLP on the secondary array.

• Question 186:

  A customer configures a SAN Copy session. They connect to the destination storage system and select a destination LUN. When they run the SAN Copy session, it fails. What could be a cause of the session failure?

  A. SAN Copy ports are not configured.
  B. SAN Copy initiators are not configured.
  C. VNXs are not in the same domain.
  D. LUNs are not the same RAID type.
  A. SAN Copy ports are not configured.

• Question 187:

  A customer runs their virtual environment on a cluster of ESX v4.0 hosts connected to an EMC VNX. They report there are long delays when they create large eager-zero thick virtual disks. You recommend they upgrade their virtual environment to vSphere v5.0 to benefit from its VAAI features. Which VAAI primitive addresses their issue?

  A. Block Zeroing
  B. Hardware assisted locking
  C. Full Copy
  D. Thin Provisioning Stun
  A. Block Zeroing

• Question 188:

  Refer to the exhibit.

  

  A VNX Snapshot is started on a thick LUN at 09:37. The customer notices that throughput declines after

  09:49

  or so. They want to know how Primary LUN throughput will decrease further over time. What should be your explanation?

  A. Primary LUN throughput will decrease until it reaches thin LUN performance levels.
  B. The number and type of Reserved LUNs will determine the lower limit of Primary LUN performance.
  C. Pool disk sizes and thick LUN compression ratios will set the lower performance bound.
  D. The VNX Snapshot read/write ratio and IO size will determine primary LUN performance level.
  A. Primary LUN throughput will decrease until it reaches thin LUN performance levels.

• Question 189:

  A customer has two EMC VNX configured to replicate between sites. Each VNX has dual Control Stations. The primary Control Station at the source site fails at 6 p.m. and reboots. At 8

  A. m., the customer completes DR testing and observes CIFS replication does not failover to the target site VNX. Why does CIFS replication not failover to the target VNX during the DR test?
  B. The control station of the primary VNX should have been failed back.
  C. The control station of the second VNX should have been failed over.
  D. The control station of the primary VNX should have IP bounding enabled.
  E. The control station of the secondary VNX should have IP bounding enabled.
  A. m., the customer completes DR testing and observes CIFS replication does not failover to the target site VNX. Why does CIFS replication not failover to the target VNX during the DR test?

• Question 190:

  A customer requires an asynchronous DR solution for an NFS-only client environment. The customer wants the solution to be simple to implement. It was recommended they create a single NIS domain, and use several NIS servers to provide

  centralized authentication to the NFS clients at both the source and destination sites. The customer asks you whether they should consider using VDMs in this environment.

  What do you advise?

  A. VDMs would offer no advantages to this environment.
  B. VDMs allow VMWare integration of NFS service environments.
  C. VDMs eliminate the need for Usermapper in NFS environments.
  D. VDMs allow for assignment of specific CPUs to a NFS server.
  A. VDMs would offer no advantages to this environment.