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Real D-UN-DY-23 dumps – Real EMC dumps PDF in here [Apr-2024]

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The EMC D-UN-DY-23 exam covers a range of topics related to Dell EMC Unity deployment such as installation, configuration, and management of the storage solution. Additionally, candidates will be tested on their knowledge of the architecture of the Dell EMC Unity system, as well as their ability to troubleshoot issues that may arise during deployment.

NO.17 A system administrator deployed a UnityVSA to their vSphere environment. They did not add the management IP to the UnityVSA during the installation.
Which command must be used to apply the management IP from the vSphere UnityVSA console?

svc_ipmi

svc_change_hw_config

svc_initial_config

svc_inject

Explanation
To apply the management IP from the vSphere UnityVSA console, the system administrator must use the svc_initial_config command. This command allows the user to configure the initial network settings for the UnityVSA, such as the management IP address, subnet mask, gateway, and DNS servers. The svc_ipmi command is used to configure the IPMI settings for the UnityVSA, such as the IPMI IP address, username, and password. The svc_change_hw_config command is used to change the hardware configuration of the UnityVSA, such as the number of CPU cores, memory size, and disk size. The svc_inject command is used to inject faults into the UnityVSA for testing purposes.
References: [Dell EMC UnityVSA Installation Guide], [Dell EMC UnityVSA Command Line Interface Reference Guide]

NO.18 Which I/O modules does the Unity 380/380F system support?

12 Gb/s SAS
2-Port 100 GbE

32 Gb/s Fibre Channel
10 GbE Base-T

12 Gb/s SAS
10 GbE Base-T

32 Gb/s Fibre Channel
2-Port 100 GbE

Explanation
The Unity 380/380F system supports two types of I/O modules: 12 Gb/s SAS back-end and 10 GbE Base-T front-end. The 12 Gb/s SAS back-end module provides connectivity to the disk drives and expansion enclosures, while the 10 GbE Base-T front-end module provides network connectivity to the hosts and clients.
The Unity 380/380F system has four I/O module slots, two for each SP. The 12 Gb/s SAS back-end module must be installed in slot 0 of each SP, and the 10 GbE Base-T front-end module can be installed in slot 1 of each SP. Therefore, the correct answer is C. 12 Gb/s SAS 10 GbE Base-T. References:
Dell EMC Unity: Hardware Information Guide
Dell EMC Unity: Installation Guide

NO.19 What are two prerequisites when creating host configuration for NFS client? (Choose two.)

Tenant information

Network Address

Subnet access

Hostname

Explanation
Host configuration is the process of defining the host properties and access permissions for a host that connects to the Dell Unity XT system. For NFS clients, the host configuration requires two prerequisites:
Network Address: The network address is the IP address or the subnet mask of the NFS client that identifies the host on the network. The network address is used to register the host on the Dell Unity XT system and to grant access to the NFS filesystems.
Hostname: The hostname is the name of the NFS client that is resolved by the DNS server or the local hosts file. The hostname is used to display the host information on the Unisphere UI and to enable host monitoring and alerting.
References:
Dell EMC Unity: Host Configuration
Dell EMC Unity: File System Configuration and Management

NO.20 Which feature can be configured for a Dell Unity XT file system NFS share?

Access-Based Enumeration

Protocol Encryption

Host Access Level

Distributed File System

Explanation
A feature that can be configured for a Dell Unity XT file system NFS share is the Host Access Level. This feature allows the user to specify the access permissions for each host or host group that is allowed to access the NFS share. The access permissions can be set to Read/Write, Read Only, or No Access. The Host Access Level feature can be used to control the security and performance of the NFS share. Access-Based Enumeration, Protocol Encryption, and Distributed File System are features that can be configured for a Dell Unity XT file system SMB share, not NFS share.
References: [Dell EMC Unity: File System Configuration], [Dell EMC Unity: SMB Share Configuration]

NO.21 Which is the preferred FC Port for synchronous replication for a Dell Unity XT 380 system?

Fibre Channel Port 4 of SPA and SPB www*

Port 1 of I/O module 0

Port 0 of I/O module 1

Fibre Channel Port 0 of I/O module 0

NO.22 A company needs to expand their dynamic pool by 10 TB. The current dynamic pool consists of 63 7.6 TB SSD drives that are configured for RAID 5 (12+1).
What is the minimum number of drives needed for the pool expansion?

Explanation
To expand a dynamic pool, the number of drives added must be equal to or greater than the stripe width of the pool. The stripe width is the number of data drives plus the number of parity drives in a RAID group. In this case, the stripe width is 12 + 1 = 13. Therefore, the minimum number of drives needed for the pool expansion is 13. References: Dell EMC Unity: Dynamic Pools Technical White Paper1, page 8.

NO.23 Which is the preferred FC Port for synchronous replication for a Dell Unity XT 380 system?

Fibre Channel Port 0 of I/O module 0

Fibre Channel Port 4 of SPA and SPB www*

Port 0 of I/O module 1

Port 1 of I/O module 0

Explanation
The preferred FC Port for synchronous replication for a Dell Unity XT 380 system is Fibre Channel Port 4 of SPA and SPB. This port is dedicated for synchronous replication traffic and has the highest priority and bandwidth allocation. Synchronous replication is a method of replicating data between two Dell Unity systems with zero recovery point objective (RPO). It requires a low-latency and high-bandwidth network connection between the source and destination systems.
References: [Dell EMC Unity: Replication Technologies], [Dell EMC Unity: Hardware Information Guide]

NO.24 Multiple I/O modules must be installed in Dell Unity XT 680 storage.
Which module must be installed in slot 0?

4-Port 25 Gbps Ethernet

4-Port 16 Gb Fibre Channel

4-Port 10 Gbps Ethernet

12 Gb/s SAS back-end

Explanation
The Unity XT 680 system supports four types of I/O modules: 12 Gb/s SAS back-end, 4-Port 16 Gb Fibre Channel, 4-Port 25 Gbps Ethernet, and 4-Port 10 Gbps Ethernet. The 12 Gb/s SAS back-end module provides connectivity to the disk drives and expansion enclosures, while the other three types of modules provide network connectivity to the hosts and clients. The Unity XT 680 system has six I/O module slots, three for each SP. The 12 Gb/s SAS back-end module must be installed in slot 0 of each SP, and the other modules can be installed in slots 1 and 2 of each SP. Therefore, the correct answer is D. 12 Gb/s SAS back-end. References
:
Dell EMC Unity XT: Hardware Information Guide
Dell EMC Unity XT: Installation Guide

NO.25 An administrator has configured a Host Group to have access to a storage object.
What are two benefits of this configuration? (Choose two.)

Ensures that snapshots are applied to all LUNs in the group

Provides multiple hosts the same access to NFS Filesvstems

Provides multiple hosts access to the same VMFS Datastores

Ensures that block storage is replicated to the same hosts

Provides multiple hosts access to the same LUNs

Explanation
A Host Group is a logical grouping of hosts that share the same access permissions to storage objects, such as LUNs, VMFS Datastores, or NFS Filesystems. By configuring a Host Group, an administrator can simplify the management of multiple hosts and ensure consistent access to the storage resources. Some of the benefits of using a Host Group are:
Provides multiple hosts access to the same VMFS Datastores: A VMFS Datastore is a block-based storage object that is formatted with the VMware File System (VMFS) and used to store virtual machine files. A VMFS Datastore can be shared by multiple hosts that are part of a VMware cluster. By adding these hosts to a Host Group and assigning the VMFS Datastore to the Host Group, the administrator can ensure that all the hosts have the same access permissions and can access the virtual machines on the Datastore.
Provides multiple hosts access to the same LUNs: A LUN is a block-based storage object that is presented to a host as a SCSI device. A LUN can be shared by multiple hosts that have the same operating system and use a cluster-aware file system. By adding these hosts to a Host Group and assigning the LUN to the Host Group, the administrator can ensure that all the hosts have the same access permissions and can access the data on the LUN.
References:
Dell EMC Unity: Host Configuration
Dell EMC Unity: VMware ESXi Hosts and Clusters

NO.26 What is the maximum time difference allowed between the current system time (UTC) and the NTP server time during the initial configuration of a Dell Unity system?

17 min

7 min

5 min

15 min

Explanation
If the time difference between the current system (UTC) time and the NTP server time is too large (approximately 17 minutes), the user cannot configure an NTP server during initial configuration. The user will need to adjust the time while in “Set time manually” mode before changing to “Enable NTP synchronization”. This is to avoid potential issues with data replication, snapshots, and audit logs that rely on accurate time stamps. References: Dell EMC Unity: How to change System Time from ‘Set time manually’ option to NTP2, page 1.

NO.27 A storage administrator has a Dell Unity XT 480 system with one pool of flash drives, 192 GB of RAM, and
1.2 TB of FAST Cache.
What is the total cache availability for caching the flash drives?

3.2 TB

1.39 TB

3.58 TB

I6.0 TB

Explanation
The total cache availability for caching the flash drives on a Dell Unity XT 480 system with one pool of flash drives, 192 GB of RAM, and 1.2 TB of FAST Cache is 3.58 TB. This is calculated by adding the system memory (RAM), the FAST Cache, and the pool cache. The system memory is 192 GB, which is equivalent to
0.18 TB. The FAST Cache is 1.2 TB, which is a dedicated cache for the flash drives. The pool cache is 2.2 TB, which is a portion of the flash drives that is reserved for caching the pool data. Therefore, the total cache availability is 0.18 + 1.2 + 2.2 = 3.58 TB.
References: [Dell EMC Unity: Performance Metrics], [Dell EMC Unity: FAST Cache Overview]

NO.28 Which are two ways to create an asynchronous replication session for a NAS server? (Choose two.)

Use NAS server properties.

Create replication connect.

Use the NAS server wizard.

Create replication interface.

Explanation
Two ways to create an asynchronous replication session for a NAS server are to use NAS server properties and to use the NAS server wizard. Both methods allow the user to select a source NAS server and a destination NAS server, and configure the replication settings, such as the RPO, the replication schedule, and the replication mode. Creating a replication connection or a replication interface are not ways to create an asynchronous replication session for a NAS server, but rather prerequisites for enabling replication between two Dell Unity systems.
References: [Dell EMC Unity: Replication Technologies], [Dell EMC Unity: NAS Capabilities]

NO.29 A deployment engineer has changed theSchedule Time Zoneunder the Settings menu. However, existing snapshots schedules continue to run at the previously configured time.
Why is this occurring?

Existing snapshot schedules cannot be updated to the same absolute time.

The Unity system time is not set correctly and must be updated under system settings.

Existing snapshot schedules are not updated to the same absolute time when the time zone is changed.

The Unity management server was not restarted before time zone changes took effect.

Explanation
When the Schedule Time Zone is changed under the Settings menu, it only affects the display of the time zone and the creation of new snapshot schedules. Existing snapshot schedules are not automatically adjusted to the new time zone, and will continue to run at the same absolute time as before. For example, if a snapshot schedule was created to run every day at 10:00 AM inGMT+1, and the Schedule Time Zone was changed to GMT+2, the snapshot schedule will still run at 10:00 AM in GMT+1, which is 11:00 AM in GMT+2. To update the existing snapshot schedules to the new time zone, the administrator must edit each schedule manually and change the start time accordingly. References: Dell EMC Unity: Snapshots and Thin Clones1, page 16.

NO.30 What does the Dell Unity XT system do after a NAS server starts outbound traffic to an external service?

Uses the active production interface

Creates an active interface buffer cache in DRAM

Selects interfaces that are based on advance static routes

Uses Packet Reflect for outbound communication

Explanation
Packet Reflect is a feature that enables the Dell Unity XT system to use the same interface for outbound communication that was used for inbound communication. This feature is useful when the Dell Unity XT system needs to initiate outbound traffic to an external service, such as DNS, NTP, LDAP, or SMTP. By using Packet Reflect, the Dell Unity XT system can avoid routing issues, firewall restrictions, or network address translation problems that may occur when using a different interface for outbound communication. When a NAS server starts outbound traffic to an external service, the Dell Unity XT system uses Packet Reflect to send the packets through the same interface that received the packets from the external service. Therefore, the correct answer is D. Uses Packet Reflect for outbound communication. References:
Dell EMC Unity: NAS Capabilities
Dell EMC Unity: Unisphere Overview

NO.31 What is the result of enabling Data Reduction on a LUN in a consistency group containing three LUNs?

Any writes to the LUN will go through the Data Reduction logic.

Data Reduction and Advanced Deduplication will be enabled on all LUNs.

Data Reduction will be enabled on all LUNs is the consistency group.

All writes to all consistency group LUNs will go through the Data Reduction logic.

Explanation
Data Reduction is a feature that reduces the amount of physical storage space required to store user data on a LUN. Data Reduction is enabled at the LUN level and applies to all the data in the LUN, including snapshots and thin clones. Data Reduction consists of two components: compression and deduplication. Compression reduces the size of data blocks by removing redundant information, while deduplication eliminates duplicate blocks across the LUN. When Data Reduction is enabled on a LUN, all writes to the LUN will go through the Data Reduction logic before being written to the storage pool. If the LUN is part of a consistency group, Data Reduction will be enabled on all the LUNs in the consistency group, and all writes to any LUN in the group will go through the Data Reduction logic. This ensures that the data in the consistency group is consistent and protected by the same Data Reduction settings. References:
Dell EMC Unity: Data Reduction Overview
Dell EMC Unity: Data Reduction Configuration and Best Practices

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The Dell Unity Deploy 2023 Exam consists of 60 multiple-choice questions that must be completed within 90 minutes. D-UN-DY-23 exam covers a wide range of topics, including Unity hardware and software components, system configurations, storage provisioning, data protection, and monitoring and troubleshooting Unity systems. Candidates who pass the exam will receive the Dell EMC Unity Deployment Engineer Certification, which demonstrates their expertise in Unity deployment and management.

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