Deck 1: VPLEX Specialist for Implementation Engineers

Question 1

According to EMC best practices, how many metadata volumes for a VPLEX Metro configuration are required on each cluster?

A) 4 Metadata volumes and 4 Metadata Backup volumes
B) 2 Metadata volumes and 1 Metadata Backup volume
C) 2 Metadata volumes and 2 Metadata Backup volumes
D) 4 Metadata Volumes and no Metadata Backup volumes

Answer 1

2 Metadata volumes and 2 Metadata Backup volumes

Question 2

You are zoning a dual-engine Local VPLEX cluster to a Symmetrix array to see LUNs 0010 and 0020 for metadata backups. How many directors in the cluster must be zoned and masked to these LUNs?

A) All of the directors
B) Any two directors
C) One from each engine
D) Only one director

Answer 2

All of the directors

Question 3

What are the recommended protection and disk type when selecting a VPLEX Logging Volume?

A) RAID6(6+2) and FC Disks
B) RAID6(14+2) and SATA Disks
C) RAID1 and SSD Disks
D) RAID5 and FC Disks

Answer 3

RAID5 and FC Disks

Question 4

When performing an installation you notice DHCP has set your Management Server subnet mask to 255.255.255.252. Based on EMC best practices, what is the appropriate subnet mask value for Management Server network 128.221.252.0?

A) 255.255.255.224
B) 255.255.255.248
C) 255.255.255.192
D) 255.255.255.128

Question 5

What is the EMC best practice for the optimum number of back-end storage paths per director presented to a LUN?

A) 4 paths
B) 2 paths
C) 8 paths
D) 16 paths

Question 6

What is EMC's best practice for fault tolerance when zoning a VPLEX Metro together over fibre channel for successful communication between the sites?

A) Ensure that all fibre channel WAN-COM ports are zoned to each other in both SAN fabrics (Many-to-Many Zoning).
B) Ensure that all fibre channel Local-COM ports are zoned to the WAN-COM ports in both SAN fabrics (One-to-Many Zoning).
C) Ensure that all fibre channel Local-COM ports are zoned to each other in both SAN fabrics (Many-to-Many Zoning).
D) Ensure that all fibre channel WAN-COM ports are zoned to each other in both SAN fabrics (One-to-Many Zoning).

Question 7

A customer has ordered a new VPLEX, and you are on site doing the initial installation. When creating metadata volumes for the VPLEX Local configuration, the customer asks you how much total storage is needed for the VPLEX metadata. According to EMC best practices, what is the total minimum storage needed for this configuration?

A) 10 GB
B) 312 GB
C) 156 GB
D) 234 GB

Question 8

You are configuring an FC Switch for a VPLEX implementation using VS2 engines. What is the required speed setting for the switch ports connected to the VPLEX FE ports in order to achieve the maximum throughput of VS2 engines?

A) 8 Gbps
B) 4 Gbps
C) 16 Gbps
D) 10 Gbps

Question 9

During the installation of a small VPLEX Metro, the command 'configuration continue-system-setup' is issued. What is accomplished by this command?

A) Back-end array discovery
B) Host initiator discovery
C) Second cluster initial setup
D) Witness configuration

Question 10

In addition to Active Directory, with what other directory service can VPLEX integrate for user authentication?

A) LDAP
B) NIS
C) NDS
D) PAM

Question 11

A customer has ordered a two-engine VPLEX cluster to be installed in a custom rack. A minimal VNX5300 is already installed in the middle of the rack, occupying nine rack unit spaces. What is the correct approach to deploy the two-engine VPLEX cluster?

A) The engines and SPSs can be placed under the VNX5300 and the other components above the VNX5300 using longer cables.
B) Use a rack with sufficient space to install all the VPLEX cluster components together according to the predefined EMC layout.
C) The installation of a two engine cluster is not supported in a customer rack without a formal EMC RPQ.
D) The EMC account team must order a factory installed VPLEX two engine configuration and ship the custom install VPLEX back to EMC.

Question 12

When configuring a VPLEX local cluster, according to EMC best practices, how many metadata volumes are required?

A) 3
B) 4
C) 2
D) 1

Question 13

When configuring a RAID-1 logging volume, what flags must be used in the command line?

A) -d -n -g -e
B) -n -d -e
C) -n -g -e
D) -d -g -e

Question 14

Which VPLEX management NIC Interface must be connected to customer IP public LAN?

A) eth3
B) eth2
C) eth1
D) eth0

Question 15

You need to claim storage that is presented to VPLEX from a VNX. What is required in order to create the mapping file needed by the VPLEX Claim Storage Wizard?

A) A host with solutions enabler installed and zoned to SPA and SPB
B) The user name, password and management address of the VNX
C) A host with WinSCP installed, with an IP connection to the VPLEX Management Server
D) The username and password of the VPLEX Management Server

Question 16

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 connect the WAN-COM ports of the first engine only and disable the second engine from the VPLEX CLI.
B) 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.
C) 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.
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.

Question 17

Where is the wwn-seed physically located on VS2 engines?

A) On the back of the engine on the bottom of the chassis
B) On the front of the management server
C) On the front of the director
D) On the front of the director bezel cover

Question 18

Which VPLEX management interface is used for initial configuration?

A) eth3
B) eth2
C) eth0
D) eth1

Question 19

You are configuring a single engine VPLEX Metro to support both local and distributed volumes. The VPLEX will utilize 10Gb WAN-COM modules in a routed configuration. According to EMC best practices, what is the minimum number of subnets and IPs required?

A) 7 subnets; 15 IPs
B) 5 subnets; 15 IPs
C) 3 subnets; 7 IPs
D) 3 subnets; 30 IPs

Question 20

Which VPLEX component is configured with a public IP address during the installation process?

A) LCOM Switch
B) Director A
C) Management Server
D) Director B

Question 21

A customer has a VPLEX Metro with VPLEX Witness installed and configured. The detach rule for consistency group is "no-automatic-winner". What will VPLEX Witness do in case of a Site 1 failure?

A) VPLEX Witness will have no effect.
B) VPLEX Witness will set the consistency group detach rule.
C) VPLEX Witness will suspend I/O at Site 1
D) VPLEX Witness will suspend I/O at Site 2

Question 22

Which VPLEX component can determine the difference between a partition and a site failure of a VPLEX Metro configuration?

A) VPLEX Witness
B) Management Server
C) Cluster 1 Engine 1
D) Consistency Group

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.

Question 24

What is the purpose of the I/O Module Upgrade Script?

A) To manage the I/O module change during a Metro to Geo topology upgrade.
B) To install the I/O load balancer module on the Management Server.
C) To configure the GbE I/O modules when installing VPLEX Geo.
D) To automate the installation of I/O modules and configuration of the directors.

Question 25

You created a synchronous consistency group, which contains two distributed volumes configured with the rule "set cluster-1-detaches". What is the expected behavior of the virtual volumes in the event of a WAN-COM failure?

A) cluster-2 is declared the winner after 5 seconds and I/O will continue at that cluster.
B) I/O will continue at both clusters.
C) I/O will be suspended at both clusters until the WAN-COM is repaired.
D) cluster-1 is declared the winner after 5 seconds and I/O will continue at that cluster.

Question 26

Which command script must be executed when upgrading a small VPLEX to medium VPLEX?

A) VPlexadmin add-engines
B) director add
C) VPlexadmin set
D) VPlexadmin add-directors

Question 27

A customer is performing maintenance on their network that might affect their VPLEX Witness VM. What can be done to ensure there are no adverse effects due to a Witness outage?

A) Disable the cluster's management server ipsec.
B) Disable the VPLEX Witness.
C) Shut down the VPLEX Witness VM.
D) Shut down the cluster's management server.

Question 28

What VPLEX user account is required to manage user security?

A) admin
B) service
C) root
D) user

Question 29

Which vplexcli command will ensure that the directors SSD firmware has been upgraded to the correct version after the VPLEX NDU ?

A) director firmware show-banks
B) version -a
C) version -a --verbose
D) ll /**/internal-disks/*

Question 30

A customer has a VPLEX Metro/GEO environment and is requesting that the VPLEX Witness be installed. The requirements for the Witness are: One vCPU
512MB ram
2)5GB storage space
What platform type is supported?

A) 64bit ESX4.0 and above
B) 32/64bit ESXi 5.0
C) 64bit MS Hyper-V 2012
D) VMware Workstation 9.0 and above

Question 31

What is required of an ESX host for the Witness to be installed?

A) Promiscuous mode set to Accept
B) ESX host in Cluster 1 failure domain
C) MAC address change set to Accept
D) ESX host in Cluster 2 failure domain

Question 32

You are doing a code upgrade on a VPLEX. In which directory do you put the upgrade files in order to execute the code upgrade?

A) /tmp/vfs
B) /diags/collect-diagnostics-out
C) /tmp/VPlexInstallPackages
D) /tmp/diags

Question 33

During an installation, the physical equipment inspection reveals an ESX host used for VPLEX Witness is located in the same rack as VPLEX cluster 1 Engine. What needs to be done?

A) VPLEX Witness server must be in a separate cabinet in the same data center.
B) The VPLEX Witness server must be placed in a separate failure domain.
C) Decrease network delay to reduce effects of equipment proximity.
D) The ESX host must be placed in a separate cabinet due to cooling requirements.

Question 34

You are preparing to migrate the topology of an installed VPLEX Local system. What is a supported upgrade path?

A) Local to Geo to Global
B) Local to Metro
C) Local to Global
D) Local to Metro to Geo

Question 35

Which element does VPLEX Witness require?

A) Virtual Volume
B) Distributed Volume
C) Distributed Device
D) Consistency Group

Question 36

You have attempted to upgrade a VPLEX system to the latest Geosynchrony code. During the upgrade, an error appeared and caused the upgrade to fail. Which file should you review to gather more information about the failure?

A) firmware.log_
B) session.log
C) VPlexconfiguration-session.txt
D) ndu-pre-check-stderr.txt

Question 37

A customer is verifying the host environment before scheduling a VPLEX NDU. According to EMC best practices, which PowerPath load-balancing policy is applied by default to all platforms?

A) Adaptive
B) RoundRobin
C) LeastIO
D) StreamIO

Question 38

VPLEX ndu pre-check command reports a time drift between directors and the Management Server. How must the NDU be performed?

A) The NDU cannot be started. the time drift must be resolved.
B) The NDU can be started using --skip-confirmations option.
C) The NDU can be started. the time drift will be automatically fixed during upgrade.
D) The NDU must be started using the --force option.

Question 39

After registering Cluster-2 with ESRS during a VPLEX Metro cluster build, what is the next step to perform before the cluster is successfully built?

A) Complete EZ-Setup Wizard on Cluster-2
B) Configure WAN connections on Cluster-1
C) Complete EZ-Setup Wizard on Cluster-1
D) Configure WAN connections on Cluster-2

Question 40

How do you verify that the VPLEX upgrade has completed successfully?

A) Log into the VPLEX Unisphere interface.
B) Run the cluster-summary command.
C) Check that the system LED is green on each director.
D) Run the ndu pre-check command.

Question 41

Which type of statistics is used to track latencies, determine median, mode, percentiles, minimums and maximums?

A) Counters
B) Readings
C) Buckets
D) Monitors

Question 42

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

A) WWPN
B) LUN ID
C) VPD ID
D) FCID

Question 43

A customer is moving some VMAX devices under a VPLEX Local and is using PowerPath as multipath software. What is the SCSI product ID assigned to VPLEX volumes?

A) Invista
B) VPLEX
C) PowerPath
D) VMAX

Question 44

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.

Question 45

IT security just implemented new security policies at a customer site. When VPLEX Management Server sends SYR reports to an ESRS gateway nothing is received at the gateway. What action did IT security take that would cause this?

A) Block TCP port 443 and 22
B) Block TCP port 80 and 21
C) Block TCP port 9090 and 5910
D) Block TCP port 21 and 445

Question 46

What is the recommendation when executing collect-diagnostics command on a VPLEX Metro/GEO?

A) Do not run simultaneously on both Management servers
B) Always use the --local-only option
C) Always use the --noextended option
D) Always use the --minimum option

Question 47

What components are required to create a storage view?

A) One or more BE ports; One or more devices; Metadata volume and Logging Volumes
B) One or more Host Initiators; One or more Virtual Volumes; One or more FE ports
C) One or more FE ports; One or more BE ports; One or more Virtual Volumes
D) One or more Host Initiators; One or more extents; One or more BE ports

Question 48

A logging volume needs to be migrated to a new array. Which command must be used to associate the distributed devices to the new logging volume?

A) logging activate
B) ds dd set-log
C) logging volume move
D) dm migration

Question 49

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

A) Cluster Management
B) Director Management
C) Cluster Statistics
D) User Management

Question 50

A customer wants to collect performance data for specific virtual-volumes and has created the performance monitor. What step needs to be performed to enable data capture?

A) The customer needs to utilize the "-capture" flag when creating the monitor
B) Virtual-volumes cannot have any performance data collected against them
C) The customer needs to create an associated sink for data collection
D) The customer needs to enable performance collection through the VPLEX GUI

Question 51

A customer wants to refresh the underlying array that comprises one-half of their local RAID-1 mirrors. Their intent is to remove the discarded mirror from VPLEX control, but as a rollback procedure, they want to ensure the detached device is a consistent copy of the original data. What is the proper way to perform this operation, meeting the customer's requirements?

A) Exclude the "--discard" option in VPlexcli when detaching the mirror
B) Include the "--discard" option in VPlexcli when detaching the mirror
C) Utilize the GUI to detach the mirror consistently
D) Utilize the GUI to teardown the virtual volume

Question 52

After an expansion of a RAID-0 device in VPLEX, the customer notices a slight degradation of performance. What could cause this?

A) After the expansion operation is complete, the original mapped device has been converted into type RAID-C.
B) After the expansion operation is complete, the original mapped device has been converted into type RAID-S.
C) The device is striped across mismatched array types.
D) The device is striped across RAID-S devices.

Question 53

The monitor report is added to the scheduler with the command schedule add "0 1 * * *" -c report poll-monitors When is task scheduled to execute?

A) 1 AM every day
B) First day of the month
C) First day of the week
D) Once every hour

Question 54

A customer has a quad-engine VPLEX Metro configuration and has stated they want to review their performance metrics from the past 4 hrs on the entire cluster. How many performing log files will they need to pull from the management server in order to analyze all of their components?

A) 16 performance log files
B) 8 performance log files
C) 2 performance log files
D) None, all metrics are displayed in the Unisphere GUI

Question 55

A customer has just introduced a new VPLEX cluster into their storage environment with numerous existing storage arrays. They need to present the host's existing data from the VPLEX cluster. Which method would you use to perform this operation?

A) Distribute
B) Stripe
C) Concatenate
D) Encapsulate

Question 56

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

Question 57

In a VPLEX Metro with Witness, which command returns the remote VPLEX management IP address and the witness public IP address?

A) shell command sudo /usr/sbin/ipsec status
B) vplexcli command cluster status
C) shell command /sbin/ifconfig
D) vplexcli command VPlexadmin show

Question 58

What option must be set for a consistency group to continue synchronization without manual intervention, once connectivity is restored?

A) rule-set-name = cluster-1-detaches
B) rebuild-allowed = true
C) auto-resume-at-loser = true
D) rebuild-type = full

Question 59

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

Question 60

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

Question 61

In a VPLEX Metro/Geo, which vplexcli command can help to troubleshoot directors latency and routing issues to other Cluster directors?

A) director fc-port-stats
B) connectivity director
C) director tracepath
D) VPlexadmin show

Question 62

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

Question 63

What is the maximum number of Virtual Volumes that can be created in a VPLEX Version 5 Cluster?

A) 2000
B) 4000
C) 8000
D) 16000

Question 64

Refer to the exhibit. Which command must be used to generate this output?

A) vpn status
B) ndu pre-check
C) health-check
D) ifconfig -a eth3

Question 65

Refer to the exhibit. A customer is moving some VMAX devices under a VPLEX Local and is using PowerPath as multipath software. What is the preferred PowerPath load balancing policy assigned to VPLEX volumes?

A) Fixed
B) Adaptive
C) Round Robin
D) SymOpt

Question 66

Refer to the exhibit. You have created a Distributed Device in a VPLEX Metro. You want to confirm the volumes before performing a mobility job within the cluster. You will be moving the device to cluster 1. Which object will be the source for this operation?

A) extent_Symm0841_03A7_1
B) DD_8_32012Nov26_183659
C) Symm0841_03A7
D) DD_7_3

Question 67

What should be the maximum latency between a VPLEX Management Server and the Cluster Witness?

A) 1 sec
B) 50 ms
C) 5 ms
D) 1 ms

Question 68

Do virtual volumes need to be taken off-line prior to upgrading VPLEX software, and why or whynot?

A) Yes, to preserve data integrity
B) Yes, because the host-based multi-pathing software provides direct access during the upgrade
C) No, because VPLEX software can be upgraded non-disruptively
D) No, because the upgrading can be undone

Question 69

Refer to the exhibit. What is the result of the command?

A) clustermirror becomes a top-level device but without any virtual volume created or guarantees about its data.
B) clustermirror becomes a top-level device, and a virtual volume is created for the device if the parent had a virtual volume.
C) clustermirror is broken down to its base extents.
D) clustermirror is detached and discarded.

Question 70

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

Question 71

How does VPLEX access back-end arrays?

A) Through Virtual Targets
B) Through Virtual Initiators
C) Through the front-end ports on the Management station
D) VPLEX provides storage through its own DAE(s)

Question 72

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.

Question 73

Refer to the exhibit. You have created a Distributed Device in a VPLEX Metro. You want to confirm you have chosen the correct volumes before performing a mobility job across clusters. You will be moving the device to cluster 1. Which object will be the source for this operation?

A) extent_Symm0841_03A7_1
B) DD_8_32012Nov26_183659
C) Symm0841_03A7
D) DD_7_3

Question 74

Refer to the exhibit. A customer needs to provision storage to a host on Cluster 1, but there is no additional local array capacity to allocate.  How could the customer facilitate assigning storage to the Cluster 1 host from an array locally connected to Cluster 2?

A) Enable remote access for a Cluster 2 virtual volume.
B) Add a remote mirror to a Cluster 2 virtual volume.
C) Create a distributed device from a virtual volume on Cluster
D) Add a virtual volume from Cluster 2 to a distributed consistency group.

Question 75

You have added a new storage array into VPLEX, but it does not see it. Which VPLEX command will display the new storage array?

A) vplexcli./clusters/cluster-/storage-elements/storage-arrays/array re-discover
B) vplexcli:/array claim -s
C) vplexcli:/clusters/cluster-//storage-elements/storage-arrays>array used-by-array
D) vplexcli:/connectivity validate-be

Question 76

Refer to the exhibit. The customer deleted ext_2 on a 20 GB LUN in order to make an extent of 10 GB. Why is the customer unable to create a 10 GB extent?

A) Storage array must be re-discovered.
B) ext_2 cannot be deleted.
C) Chunks of the storage need to be contiguous.
D) The defrag property is set to false.

Question 77

Refer to the exhibit. You are planning to perform data mobility between VPLEX Clusters using the GUI. What mobility job options do you have?

A) create, stop, activate, monitor, pause, throttle and terminate
B) create, activate, fracture, resync, monitor, pause, and commit
C) create, cancel, suspend, monitor, pause, throttle, and terminate
D) create, remove, cancel, monitor, pause, throttle, and commit

Question 78

Which is the best way to identify the root cause of long read latencies using monitors?

A) Check if the %CPU Busy is above 50%
B) Check to see if all volumes are in at least 1 Consistency Group
C) Check the ratio of cache.rhit to cache.miss
D) Check the difference between fe-director.read-lat and storage-volume.read-latency

Question 79

Refer to the exhibit. After 6 months of operation, you are monitoring the health of the VPLEX system from the Unisphere Manager for VPLEX. What is the most likely reason for a state change of the VPLEX Witness?

A) TheESXi host was rebooted.
B) The WAN switch ports failed.
C) The Management Server was restarted.
D) TheMetaVolume was restored.

Question 80

Refer to the exhibit. After the "attach-mirror" command is successfully executed on device "device_VNX0506_CSE__6_1", the command "rebuild-status" shows an ongoing rebuild process on the same device. What is a possible cause?

A) It is a normal behavior. when attaching a mirror, a rebuild process starts.
B) The device "device_VNX0506_CSE__6_1" has an ongoing rebuild process for a previous failure.
C) The rebuild process is related to a director failure.
D) The device mirror will start only after the rebuild process is completed.