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E20-885 Real Exam Questions

VNX Solutions Expert Exam for Implementation Engineers

275 questions available · Page 1 of 28

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Question 1 Single choice

Which part of the VNX initiates failover of a Blade?

  1. A

    SP

  2. B

    User

  3. C

    Blade

  4. D

    Control Station

Show answer and explanation

Correct answer: C

Question 2 Single choice

An Oracle DBA creates a new database and requests a LUN to store the online redo logs.

What is the recommended configuration for this LUN?

  1. A

    RAID 1/0 using SAS drives

  2. B

    RAID 5 using Flash drives

  3. C

    RAID 1/0 using Flash drives

  4. D

    RAID 5 using SAS drives

Show answer and explanation

Correct answer: A

Question 3 Single choice

You are planning a CIFS DR solution for two existing EMC VNX. Each VNX has dual Control Stations.
Each VNX is also configured for a RecoverPoint protection solution on other VNX LUNs that are non-file related.

What recommendation would you give the customer concerning the CIFS DR solution?

  1. A

    Configure IP aliasing on the Control Stations for both source and destination VNX systems before configuring VNX Replicator

  2. B

    Configure IP aliasing on the Control Stations for both source and destination VNX systems after configuring VNX Replicator

  3. C

    Configure IP aliasing on the source VNX system Control Stations before configuring VNX Replicator, and then configure IP aliasing on the destination VNX system Control Stations after configuring VNX Replicator.

  4. D

    Configure IP aliasing on the source VNX system Control Stations before configuring VNX Replicator and use RecoverPoint to provide protection of the source VNX Control Stations to the destination VNX.

Show answer and explanation

Correct answer: A

Question 4 Single choice

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?

  1. A

    Add LUNs to the RLP on the secondary array.

  2. B

    Create a Secondary Image with a traditional LUN.

  3. C

    Add LUNs to the RLP LUN on the primary array.

  4. D

    Configure the WIL LUN on both arrays.

Show answer and explanation

Correct answer: A

Question 5 Single choice

A storage administrator reports they are unable configure SAN Copy connections between two VNX. The required cabling is in place and zoning is correct, but the SP connections still do not appear in Unisphere Manager.

What could have caused this issue?

  1. A

    SAN Copy is not installed on both VNX arrays.

  2. B

    SAN Copy is only licensed for local copies.

  3. C

    The SP ports are already being used by hosts.

  4. D

    Both VNX arrays are not in the same domain.

Show answer and explanation

Correct answer: D

Question 6 Single choice

An implementation engineer installs a DR solution to protect ten CIFS shares at site A. VNX Replicator will be used to replicate the shares from Site A to Site B.

How many VDMs should be contained in this DR solution for maximum portability?

  1. A

    10

  2. B

    2

  3. C

    5

  4. D

    20

Show answer and explanation

Correct answer: D

Question 7 Single choice

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?

  1. A

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

  2. B

    The old VMs are still running old VMware tools.

  3. C

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

  4. D

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

Show answer and explanation

Correct answer: A

Question 8 Single choice

You review a Unisphere Analyzer report from a customer's EMC VNX. You observe that disk read activity is higher than can be accounted for from host reads and normal pre-fetch activity.

What is the likely cause?

  1. A

    Writes on the array are reasonably sequential, but there is not enough data in cache to fill each stripe.

  2. B

    Individual writes are being requested and sequenced until the entire stripe is cached and parity is calculated before being written.

  3. C

    Disk crossings and stripe crossings are normal events where large I/O is involved.

  4. D

    The Unisphere Analyzer report was run against the wrong storage processor.

Show answer and explanation

Correct answer: A

Question 9 Single choice

A storage administrator creates a new file system on their EMC VNX. They observe that the new file system does not perform as well as the first set of file systems they created. AVM was used to create all file systems using pool LUNs. All disks in the VNX are the same size and speed SAS drives.

When the storage administrator attempts to create another file system, using the same resources, the creation process fails.

Why did the file system creation fail on the last attempt?

  1. A

    AVM is unable to fulfill the file system creation request due to a lack of mapped pool resources.

  2. B

    Thick and thin LUNs cannot be combined to fulfill the storage requirements.

  3. C

    AVM requires that pool LUNs stripe five dvols together. Only four dvols were available.

  4. D

    Thick and thin LUNs that were available to create the file system did not share the same service policy.

Show answer and explanation

Correct answer: A

Question 10 Single choice

You receive a call from a customer asking why they are not getting optimal performance on their new Block pool LUNs that they created last week.

How could the customer obtain more predictable performance?

  1. A

    Move to classic LUNs

  2. B

    Make sure to use thin LUNs

  3. C

    Move LUNs to a new pool and select the lowest tier

  4. D

    Move LUNs to a new pool and select the highest tier

Show answer and explanation

Correct answer: A