E20-885 Online Practice Questions and Answers

A customer recently upgraded from vSphere v4.x to vSphere v5.0 to benefit from new VMFS-5 features for

their existing `DataStore1' and `DataStore2' datastores on an EMC VNX. A second identically configured

VNX was implemented and the customer created two additional datastores on the new VNX.

After monitoring the environment, the customer notices the VMs on `DataStore1' and `DataStore2' are not

using the same sub-block structure as the two new datastores.

What is the reason for this behavior?

A. The old VMs are on an upgraded VMFS-5 datastore.

B. The old VMs are still running old VMware tools.

C. The new VMFS-5 features need to be licensed and activated.

D. The new VMFS-5 cannot support two VNX storage systems.

A Pool used for FAST VP has the following configuration:

Flash drives: 1,000 GB, with 1,000 GB free SAS drives: 5,000 GB, with 2,500 GB free NL-SAS drives: 20,000 GB, with 11,500 GB free

The tiering policy is set to Auto. An additional 600 GB of new data is written to the Pool. What is the data distribution after the data is written?

A. Flash drives: 960 GB free SAS drives: 2,400 GB free NL-SAS drives: 11,040 GB free

B. Flash drives: 400 GB free SAS drives: 2,500 GB free NL-SAS drives: 11,500 GB free

C. Flash drives: 900 GB free SAS drives: 2,000 GB free NL-SAS drives: 11,500 GB free

D. Flash drives: 970 GB free SAS drives: 2,350 GB free NL-SAS drives: 11,080GB free

A customer creates an incremental SAN Copy (ISC) session for a 200 GB LUN on an EMC VNX. The session fails to start, and the customer notes the RLP (reserved LUN pool) contains 300 MB of storage. What action must be taken to get the session started?

A. Increase the RLP storage to 30 GB.

B. Deactivate the ISC snapshot.

C. Enable the SnapView license.

D. Restart the COFW service.

A customer configures replication between two data movers for their VDM environment. The primary data mover has one 1 Gb copper ethernet port and the destination Data Mover has one 10 Gb optical network port. The customer completes a failover test and then remote clients report they are unable to access data. The customer requests your assistance. What is the most likely cause of the issue observed during failover test?

A. The interface speeds do not match on both Data Movers

B. The interface on the Data Movers have a Duplex mismatch

C. The interface names do not match on both Data Movers

D. The interface medium do not match between Data Movers

You review a Perfmon log that contains several days worth of data for a customer's SQL Server database LUN. The log contains both read and write I/O per second collected at 3-minute intervals.

What method should you use to determine the correct I/O per second target number for calculating the number of RAID corrected spindles?

A. 75th percentile

B. Overall Peak

C. Overall Average

D. 90th percentile

You are installing a new EMC VNX. All flash drives will be provisioned for FAST Cache. The VNX has the following hardware:

6 DAEs

24 Flash drives

24 SAS drives

24 NL-SAS drives

How should the drives be physically located for better performance and stability?

A. The Flash drives should be placed on DAE0 and DAE1, followed by the SAS drives, and then the NLSAS drives

B. The SAS drives should be placed on DAE0 and DAE1, followed by the Flash drives, and then the NLSAS drives.

C. The SAS drives should be placed on DAE0 and DAE1, followed by the NL-SAS drives, and then the Flash drives.

D. The physical location of the drives does not affect the performance of a VNX.

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 customer configures an Incremental SAN Copy session between a 500 GB LUN and a 550 GB thick LUN on a new DR VNX. The reserved LUN pool has 50 GB of free space. The source VNX has registered with the DR VNX. The SAN Copy session does not start. What is the cause of the issue?

A. There is insufficient reserved space.

B. The SnapView enabler is not installed.

C. SAN Copy between a thin and thick LUN is unsupported.

D. Destination LUN is a 550 GB thick LUN.

A customer is testing a DR solution. They want to change the destination file system from read only to read/write and stop the transmission of replicated data.

How can this be accomplished?

A. Replication failover

B. Replication failback

C. Replication reversal

D. Replication switchover

Your team is planning a DR test for a CIFS DR solution using VNX for File. You need to confirm that users will be able to access data at the DR site in the event of a source site disaster. The VNX at the source site will not be shut down during the DR test.

How should you proceed with the test?

A. Replication switchover from the source VNX

B. Replication switchover from the DR site VNX

C. Replication failover from the DR site VNX

D. Replication failover from the source VNX