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E20-260 Questions and Answers

Question # 6

A VPlex administrator claims a 100GB Storage Volume that is thin provisioned on the storage array and has 25GB physically allocated and creates a 1:1 encapsulated virtual volume. After a local data mobility job for that Virtual Volume, the storage array administrator notices that the allocated capacity has increased to 100GB.

Why did this happen?

A.

The destination Storage Volume was not claimed with the thin-rebuild parameter in VPLEX.

B.

VPLEX does not support thin devices.

C.

Neither the source nor the destination Storage Volume were claimed with the thin-rebuild parameter in VPLEX.

D.

The source Storage Volume was not claimed with the thin-rebuild parameter in VPLEX.

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Question # 7

Which command would you execute to perform basic system checks to ensure that the VPLEX cluster is working properly?

A.

health-check

B.

cluster config-dump

C.

validate-system-configuration

D.

cluster summary

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Question # 8

What are the four basic dm migration commands for moving extents or devices?

A.

Start, commit, clean, and remove

B.

Create, clean, commit, and remove

C.

Start, commit, clean, and terminate

D.

Create, commit, clean, and terminate

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Question # 9

Refer to the exhibit.

You have created a Distributed Device in a VPLEX Metro system. Which VPLEX Object can be placed in a Storage View for Cluster-1?

A.

DD_8_3_vol

B.

DD_8_32012Nov26_183659

C.

Symm0841_03A7

D.

extent_Symm0841_03A7_1

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Question # 10

A host attempted a read from a volume in a VPLEX Metro configuration. The data does not exist in cache at all.

What process does VPLEX use to service the read request?

A.

VPLEX first searches the local cache for the data, then the cache coherency directory before reading from the array.

B.

VPLEX first searches the cache coherency directory for the data before reading from the array.

C.

VPLEX first searches the local cache for the data before reading from the array.

D.

VPLEX first searches the cache coherency directory for the data, and then searches the local cache before reading from the array.

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Question # 11

What are the three components that a drill-down command can be run against to provide a more detailed analysis?

A.

Storage-View, Virtual-Volume, Device

B.

Storage-View, Virtual-Volume, Storage-Volume

C.

Storage-View, Consistency-Group, Device

D.

Storage-View, Virtual-Volume, Extent

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Question # 12

You have a perpetual performance monitor running on director 1-1-A The data being monitored is growing at a rate of 2 MB per minute. At the current data rate, how far back in time will this monitor be able to reach?

A.

5 minutes

B.

5 hours

C.

50 hours

D.

50 minutes

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Question # 13

What is the role of the port with the WWN 5000144270061010 on a VS2 engine?

A.

Back-end

B.

Front-end

C.

Local-COM

D.

WAN-COM

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Question # 14

Refer to the exhibit.

NDU pre-check failed because minimal topology is in use. Which parameter can be added to the ndu start command that will allow the NDU to proceed without error in this situation?

A.

Only the --force option

B.

Only the --skip-view-config-check option

C.

Both the --skip-sysconfig-check and --skip-view-config-check options

D.

Both the --skip-sysconfig-check and --force options

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Question # 15

A customer has purchased a dual engine VPLEX Metro cluster. During installation, there are not enough free SAN ports to connect all WAN-COM ports to the SAN. What is the recommended approach?

A.

The customer must provide additional SAN ports or acquire additional SAN ports to connect all WAN-COM ports of both VPLEX engines to the SAN.

B.

The customer must connect the WAN-COM ports of the first engine only and disable the second engine from the VPLEX CLI.

C.

It is sufficient to connect the WAN-COM ports of either engine 1 or 2 because redundancy is provided by leveraging two separate SAN fabrics.

D.

The customer must connect the WAN-COM ports of the first engine only and disable the second engine from the Unisphere for VPLEX GUI.

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Question # 16

In which asynchronous Consistency Group Operation stage are the delta sets written to the storage arrays?

A.

Commit

B.

Closed

C.

Exchange

D.

Open

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Question # 17

What can you use to generate a list of VPLEX fabric initiator and target identifiers?

A.

Atlas WWN Tool

B.

Solve Desktop

C.

Support.EMC.com

D.

Unisphere for VPLEX

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Question # 18

Refer to the exhibit.

What is the function of the two highlighted VPLEX VS2 modules?

A.

Back-end connectivity

B.

Front-end connectivity

C.

WAN-COM connectivity

D.

Local-COM connectivity

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Question # 19

A dual fan failure occurs on a single VPLEX engine.

What will be the result?

A.

The engine will shut down immediately.

B.

Director B only will shut down.

C.

Director A only will shut down.

D.

The engine will shut down after three minutes.

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Question # 20

Refer to the exhibit.

You are preparing to perform an upgrade on an unconfigured VPLEX Metro. When you run the ndu pre-check command, it indicates that it has failed and there are no first upgraders. In your troubleshooting, you run the version -a command.

Based on the output, what is the reason for the failure?

A.

health-check --full was not run

B.

Directors are at incompatible code levels

C.

ndu pre-check --force flag was not used

D.

Directors are not connected.

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Question # 21

A customer has a VPLEX Metro installed. They asked you to recommend a method to non-disruptively move Virtual Volumes from a storage array at Cluster 1 to a storage array at Cluster 2. What would you recommend?

A.

Use the Device Mobility feature of VPLEX.

B.

Use the Extent Mobility feature of VPLEX.

C.

Change the RAID protection to RAID 0

D.

Use array-based features to copy the storage volume, then rediscover the array.

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Question # 22

medium-sized VPLEX clusters are connected via IP with a round-trip latency of approximately 35 ms.

What type of configuration is this?

A.

Geo

B.

Metro

C.

Local

D.

Global

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Question # 23

A new VPLEX cluster has been configured. However, you are unable to register any host initiators. After verifying that the host has been properly zoned to the VPLEX cluster, you still cannot register them. What is a possible cause?

A.

Front end ports have not been enabled.

B.

Back-end ports have not been enabled.

C.

Back-end arrays have not presented any LUNs.

D.

Storage View for host has not been created.

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Question # 24

How can you throttle the migration rate for VPLEX?

A.

By configuring the maximum copy speed

B.

By setting the copy policy

C.

This is done automatically without any user action

D.

By dynamically changing the I/O write size for copying

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Question # 25

Which protocols are required for a service laptop to communicate with and maintain a VPLEX environment?

A.

SNMP and FTP

B.

SSH and SCP

C.

SCP and Telnet

D.

SSH and SSL

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Question # 26

An EMC customer wants to add a mirror to a VPLEX Local RAID 0 device. Which RAID type is created after the device attach-mirror command is issued?

A.

RAID 1

B.

RAID 0

C.

RAID S

D.

RAID C

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Question # 27

Which unique logical identifier is used when determining the relationship between a virtual volume and the back-end storage array?

A.

VPD ID

B.

WWPN

C.

LUN ID

D.

FCID

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Question # 28

Refer to the exhibit.

The customer has not followed EMC best practices when cabling their VS2 VPLEX engine. You are asked how to re-cable the engine to adhere to best practices. What is your response?

A.

Swap port 00 with port 01 of both director A and director B.

B.

Swap port 02 with port 03 of both director A and director B.

C.

Swap port 00 with port 01 of director B.

D.

Swap port 00 with port 01 of director A.

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Question # 29

What function does the SNMP agent on the Management Server provide?

A.

Cluster Management

B.

Director Management

C.

Cluster Statistics

D.

User Management

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Question # 30

When do you enable the front-end ports during VPLEX installation?

A.

After create meta-volumes and backup

B.

Before create meta-volumes and backup

C.

Before launch EZ-Setup wizard

D.

After expose storage to hosts

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Question # 31

Which type of volume has complete synchronized copies of data (mirrors) in more than one cluster?

A.

Distributed Device

B.

Extent

C.

Device

D.

Virtual Volume

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