EMC E20-885 questions and answers

NO.1 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.
Answer: A

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NO.2 A customer requires their FAST Cache configuration to be destroyed in order to increase FAST
Cache size. However, they are concerned about the performance impact that this will cause.
What should you tell the customer to expect?
A. Increased write activity on data disks from LUNs that were FAST Cache enabled
B. Increased write activity on FAST Cache disks from LUNs that were FAST Cache enabled
C. Temporary suspension of all write I/O to DRAM cache
D. Temporarily bypass of DRAM cache by all write I/O
Answer: A

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NO.3 A customer wants to deploy an Exchange 2010 farm doing 8,400 IOPS with a R/W ratio of 1/1.
The total amount of space needed is 7,500 GB.
What would you recommend the storage configuration to be?
A. A pool consisting of five 100 GB eMLC Flash drives, and 30 drives of 300 GB 15K in RAID 5, with
FAST-VP enabled
B. A pool consisting of five 100 GB eMLC Flash drives in RAID 5, and 20 drives of 300 GB 15K in RAID 5,
with FAST-VP enabled
C. A pool consisting of 120 drives of 300 GB 15K, in RAID 5 (4+1)
D. A pool consisting of 120 drives of 600 GB 15K, in RAID 5 (4+1)
Answer: A

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NO.4 A customer is migrating an Oracle database to a new EMC VNX. The database consists of
random, small I/O workloads with high transaction rates.
What RAID type should be used for the LUN containing the data files in order to prevent I/O
bottlenecks during peak load?
A. RAID 6
B. RAID 3
C. RAID 1/0
D. RAID 5
Answer: C

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NO.5 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
Answer: A

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NO.6 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)
B)
C)
D)
A. Exhibit A
B. Exhibit B
C. Exhibit C
D. Exhibit D
Answer: A

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NO.7 A customer uses MirrorView/S to replicate their production data from Site A to Site C.
The production Oracle server is located at Site A and has access to LUNs 101 and 102.
LUNs 101 and 102 are placed in a consistency group.
Site A experiences a disaster and production moves to Site C.
What configuration change is needed to provide the Oracle server access to Site C's LUNs 101 and
102?
A. Promote the Secondary Image.
B. Connect the Oracle server to the appropriate storage group.
C. Add the Secondary Image to the appropriate storage group.
D. Fracture the mirror.
Answer: A

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NO.8 A customer wants to implement a DR solution on two VNX for File located at a primary and a
backup site. They have three VDMs, each with a CIFS file system providing shares for sales, finance
and marketing. What must be configured for a successful failover?
A. The Data Movers associated with the VDM replication must have identical interface names.
B. The VDM root file system should be configured on storage with identical RAID types.
C. The VDM should be built on the same user file system that contains the CIFS share.
D. The Data Movers associated with the VDM replication must have identical physical network
devices.
Answer: A

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Exam Code: E20-885
Exam Name: VNX Solutions Expert Exam for Implementation Engineers
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EMC E20-885 Exam Dumps 275 Q&As
Updated: 07-15,2015
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