EMC E20-885 Online Practice Questions and Exam Preparation

EMC E20-885 Online Questions & Answers

• Question 41:

  A customer placed their application data on a thin LUN created from an existing pool. The thin LUN is reaching capacity and cannot be expanded due to capacity constraints on the pool. What is the best way for the customer to reclaim some of the capacity on the thin LUN?

  A. Compress the thin LUN
  B. Defragment the thin LUN
  C. Migrate the data to a new LUN on a new pool
  D. Migrate the data to a new LUN on the same pool
  A. Compress the thin LUN

• Question 42:

  A VDI environment is using VNX over iSCSI for its data stores. All planning trials with an application test harness, and thorough HA simulation, indicated a maximum of 1000 virtual desktops for the VNX pool for acceptable performance. The

  actual number of desktops allocated to the pool is 750.

  Users have reported poor virtual desktop performance, and the VNX Administrator has observed a consistently high level of read I/O on the VNX LUNs servicing this VDI solution.

  What is a possible cause of this situation?

  A. Desktops have insufficient RAM allocation.
  B. A desktop virus has triggered CAVA antivirus scan for all desktops.
  C. An employee shift change triggered excessive I/O to load user profiles.
  D. VNX FAST Cache was not sized correctly.
  A. Desktops have insufficient RAM allocation.

• Question 43:

  A customer plans to connect ESXi 5.0 hosts to a new EMC VNX array. They want to take advantage of the hardware-assisted locking feature in VAAI. Which is a feature of hardware- assisted locking?

  A. Locking at the block level of a logical unit
  B. Locking the LUN instead of the block level
  C. Accessing a block from multiple hosts at the same time
  D. Automatic enabling of safe data caching
  A. Locking at the block level of a logical unit

• Question 44:

  A customer wants to test the workload response of a newly-implemented EMC VNX for File that will support a Windows client environment. The customer confirms the application workload will be 80% random writes, of 8 KB or less in size, with bursty patterns of write I/O. Which tool could be used to simulate this workload for testing purposes?

  A. server_stats
  B. nas_stats
  C. Unisphere
  D. Iometer
  D. Iometer

• Question 45:

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

  A customer is deploying an Exchange 2010 environment on an EMC VNX. There will be 30,000 mailboxes distributed across mailbox servers within a DAG (database availability group) that maintains three database copies. Each user sends approximately 350 messages per day. The customer wants to use 600 GB 15K drives in a RAID 5 group. How many spindles are needed to support the performance required for this Exchange environment?

  A. 197
  B. 132
  C. 158
  D. 175
  A. 197

• Question 46:

  You are deploying Exchange 2010 using a VMware virtualized infrastructure. A large VMFS partition will support the operating system binaries for four mailbox servers. RDM devices will be used for all database and log volumes. All partitions on the RDMs have been created using Windows Disk Manager.

  During deployment verification, you populate a database with test data and attempt to create a backup of it using Replication Manager. The replica creation fails with an error. What is the cause?

  A. The RDMs were created in virtual mode.
  B. The vSphere client was used to create the VMFS partitions.
  C. The ESX 'maxlun' parameter has been exceeded.
  D. Replication Manager does not support VMFS volumes.
  A. The RDMs were created in virtual mode.

• Question 47:

  A customer deployed a single EMC RecoverPoint 2-node cluster with Virtual RPA configured with RecoverPoint/SE license at the primary site. They want to scale-up the environment. With the current RecoverPoint/SE license, how many vRPAs can be added?

  B. 4
  C. 6
  D. 8
  C. 6

• Question 48:

  A customer has two EMC VNX, one at the primary site and the other at a DR site located 100 km away. The WAN connection between sites is a 100 Mb/s dark fiber link with 4 ms latency.

  A previous storage administrator configured the pool LUNs for the file system on thin LUNs. The file system is growing at a rate of 500 GB per week and is on a VDM. The new storage administrator reports performance issues with the file system. What is the most likely reason for the performance issue?

  A. Thin LUNs are used for the file system.
  B. The WAN link should be upgraded to an eLAN.
  C. The VNX system requires an upgrade.
  D. The file system has too many concurrent users connected.
  A. Thin LUNs are used for the file system.

• Question 49:

  A customer is using SAN Copy to migrate data between two EMC VNX. They use Navisphere Secure CLI to manually select the source and destination LUNs for the SAN Copy session. The source LUN is 419430400 blocks in size, with 367001600 blocks used for data. They select a destination LUN that is 367001600 blocks in size. The SAN Copy session starts, but fails to complete. What is the most likely cause for this SAN Copy session behavior?

  A. The source and destination LUNs do not have the same block count.
  B. The source LUN is already being replicated to a different destination LUN.
  C. The source and destination LUNs are not the same RAID type.
  D. The destination LUN needs to have a smaller block count than the source LUN.
  A. The source and destination LUNs do not have the same block count.

• Question 50:

  A customer wants to implement file system replication between two EMC VNX systems. The source production file system contains data from a random workload that resides in a pool composed of SAS drives. Due to cost concerns, the destination file system and SavVol volumes will be placed on dedicated 2 TB NL-SAS drives.

  What should you tell the customer about this configuration?

  A. NL-SAS is only adequate if the source file system is on NL-SAS and contains a sequential application.
  B. Replicator session performance will decrease because SavVol shares LUNs with user applications.
  C. Only Flash and SAS drives should be used for Replicator SavVol volumes.
  D. The destination file system can be used as a source for cascaded replication with no impact to performance.
  A. NL-SAS is only adequate if the source file system is on NL-SAS and contains a sequential application.