(2024) D-UN-DY-23 Dumps and Practice Test (38 Questions)
Guide (New 2024) Actual EMC D-UN-DY-23 Exam Questions
EMC D-UN-DY-23 Exam consists of 60 questions and has a time limit of 90 minutes. The questions are designed to test the candidate's practical knowledge and understanding of the Dell EMC Unity storage system. Candidates who pass the exam will be able to demonstrate their ability to install and configure Unity systems, manage and protect data, and perform troubleshooting and maintenance tasks. With this certification, candidates can improve their career prospects, demonstrate their expertise to their colleagues and employers, and gain recognition as a skilled IT professional in the field of Dell EMC Unity storage systems.
NEW QUESTION # 21
A company has an ESXi host installed with FC HBAs that is connected to a Dell Unity XT storage array. A
500 GB LUN is provisioned to this host from the Unity array and is in production. The VMware administrator has configured a new vSwitch with the NICs on the server intended for iSCSI traffic. The storage administrator is asked to configure software iSCSI and provision a new 1 TB LUN from the storage array using iSCSI.
What is a consideration when satisfying this request?
- A. Any single host should connect to any single array using one protocol only.
- B. Two iSCSI target interfaces must be configured with IP addresses from separate subnets.
- C. A connection must be established between the host iSCSI initiators and Unity iSCSI targets before provisioning the new LUN.
Answer: A
Explanation:
Explanation
Mixing FC and iSCSI protocols for the same host and array is not supported by Dell EMC Unity. This can cause issues with multipathing, failover, and performance. The best practice is to use one protocol per host and array pair. If the host needs to access both FC and iSCSI LUNs from different arrays, then separate vSwitches and port groups should be used for each protocol. References: Dell EMC Unity: Best Practices Guide1, page
19.
NEW QUESTION # 22
Into what size slices is the LUN partitioned for RAID extents?
- A. 64 MB
- B. 256 MB
- C. 512MB
- D. 128 MB
Answer: D
Explanation:
Explanation
A LUN is a logical unit of storage that is presented to a host as a SCSI device. A LUN is composed of one or more RAID extents, which are the smallest units of storage that can be allocated to a LUN. A RAID extent is a slice of a RAID group that is used to store user data and parity information. The size of a RAID extent depends on the RAID type and the drive type of the RAID group. For example, a RAID 5 extent on a SAS drive is 128 MB, while a RAID 6 extent on a NL-SAS drive is 256 MB. The LUN is partitioned into slices that match the size of the RAID extents, and each slice is mapped to a RAID extent from a RAID group in the storage pool. The LUN slices are distributed across multiple RAID groups to improve performance and availability. References:
Dell EMC Unity: Storage Pools and RAID Groups
Dell EMC Unity: LUN Management
NEW QUESTION # 23
A storage administrator must configure replication from a production Dell Unity XT 680F to an offsite DR Dell Unity XT 480. Block resources must be replicated without data loss if the production site becomes unavailable. File resources can be replicated with an acceptable amount of data difference on the destination.
What replication configuration meets the requirements?
- A. Configure the replication interfaces on the 4-port mezzanine card.
- B. Configure the replication connection mode to Both.
- C. Set an RPO of 0 on the synchronous replication sessions.
- D. Set Unisphere resource filtering to All.
Answer: B
Explanation:
Explanation
To meet the requirements, the replication connection mode must be set to Both, which allows both synchronous and asynchronous replication sessions to be configured on the same connection. This way, block resources can use synchronous replication, which ensures zero data loss, and file resources can use asynchronous replication, which allows some data difference on the destination. Setting Unisphere resource filtering to All is not necessary, as it only affects the display of resources in the Unisphere GUI. Setting an RPO of 0 on the synchronous replication sessions is redundant, as synchronous replication always has an RPO of 0. Configuring the replication interfaces on the 4-port mezzanine card is not relevant, as it only affects the performance and availability of the replication network.
References: [Dell EMC Unity: Replication Technologies], [Dell EMC Unity: Unisphere Overview]
NEW QUESTION # 24
Which are two ways to create an asynchronous replication session for a NAS server? (Choose two.)
- A. Use the NAS server wizard.
- B. Use NAS server properties.
- C. Create replication connect.
- D. Create replication interface.
Answer: A,B
Explanation:
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]
NEW QUESTION # 25
Which is the preferred FC Port for synchronous replication for a Dell Unity XT 380 system?
- A. Port 1 of I/O module 0
- B. Fibre Channel Port 4 of SPA and SPB www*
- C. Fibre Channel Port 0 of I/O module 0
- D. Port 0 of I/O module 1
Answer: B
NEW QUESTION # 26
An administrator notices that the communications between Unisphere and the storage system get interrupted.
Which service task should the administrator perform to fix the issue with minimal impact?
- A. Reinitialize
C Enable SSH - B. Reboot Storage Processor
- C. Restart Management Software
Answer: C
Explanation:
Explanation
The service task that the administrator should perform to fix the issue with minimal impact is Restart Management Software. This service task restarts the management software on both storage processors without affecting the data services or the host I/O. This can resolve the communication issues between Unisphere and the storage system. Reinitialize, Enable SSH, and Reboot Storage Processor are service tasks that have more impact and risk than Restart Management Software.
References: [Dell EMC Unity: Unisphere Overview], [Dell EMC Unity: Service Tasks]
NEW QUESTION # 27
What is the maximum size of a drive partnership group when expanding a Dynamic Pool?
- A. 64 drives
- B. 96 drives
- C. 32 drives
- D. 84 drives
Answer: C
Explanation:
Explanation
A drive partnership group is a collection of drives of the same drive type that have been combined into a hidden dynamic pool object. Each drive within a dynamic pool can only be part of a single drive partnership group, and a drive will never change the drive partnership group. The maximum size of a drive partnership group is 32 drives, regardless of the drive type or size. When expanding a dynamic pool, the system will automatically create new drive partnership groups as needed, and distribute the drives evenly across the groups. The number of drive partnership groups in a dynamic pool is equal to the number of drives divided by
32, rounded up to the nearest integer. References: Dell Unity: Dynamic Pools2, page 5.
NEW QUESTION # 28
What is a characteristic of FAST VP?
- A. Users can enable or disable FAST VP at the LUN level.
- B. Users can set the Fast VP data relocation rate.
- C. Fast VP optimizes data replacement by moving 1 GB slices between disk tiers.
- D. Fast VP data relocation runs in the background at all times once it is enabled.
Answer: B
Explanation:
Explanation
FAST VP (Fully Automated Storage Tiering for Virtual Pools) is a feature that automatically moves data within a storage pool based on the performance requirements and access patterns of the data. FAST VP data relocation runs in the background according to a user-defined schedule and rate. The schedule determines when the data relocation starts and ends, and the rate determines how much system resources are used for the data relocation. Users can set the Fast VP data relocation rate to High, Medium, Low, or None. High means that the data relocation has the highest priority and uses the most system resources, while None means that the data relocation is disabled. Fast VP data relocation does not run at all times, but only during the scheduled window. Fast VP optimizes data placement by moving 256 MB slices between disk tiers, not 1 GB slices.
Users cannot enable or disable FAST VP at the LUN level, but only at the storage pool level.
References: [Dell EMC Unity: FAST Technology Overview], [Dell EMC Unity: Storage Pools and RAID Groups]
NEW QUESTION # 29
On a Dell Unity XT file system asynchronous replication session, how many system Snapshots are required to support replication?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
Explanation
On a Dell Unity XT file system asynchronous replication session, four system Snapshots are required to support replication. Two system Snapshots are created on the source file system, and two system Snapshots are created on the destination file system. The source system Snapshots are used to track the changes that need to be replicated, and the destination system Snapshots are used to apply the changes and maintain a consistent point-in-time copy of the source data. The system Snapshots are automatically created and managed by the replication engine and are not visible to the user.
References: [Dell EMC Unity: Replication Technologies], [Dell EMC Unity: File System Configuration]
NEW QUESTION # 30
What is the result of enabling Data Reduction on a LUN in a consistency group containing three LUNs?
- A. Data Reduction and Advanced Deduplication will be enabled on all LUNs.
- B. Any writes to the LUN will go through the Data Reduction logic.
- C. All writes to all consistency group LUNs will go through the Data Reduction logic.
- D. Data Reduction will be enabled on all LUNs is the consistency group.
Answer: C
Explanation:
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
NEW QUESTION # 31
An administrator has configured a Host Group to have access to a storage object.
What are two benefits of this configuration? (Choose two.)
- A. Provides multiple hosts access to the same LUNs
- B. Provides multiple hosts access to the same VMFS Datastores
- C. Provides multiple hosts the same access to NFS Filesvstems
- D. Ensures that snapshots are applied to all LUNs in the group
- E. Ensures that block storage is replicated to the same hosts
Answer: A,B
Explanation:
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
NEW QUESTION # 32
In an asynchronous replication, what is the maximum number of replicated NAS servers supported for the Dell Unity XT 380 series?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
Explanation
The maximum number of replicated NAS servers supported for the Dell Unity XT 380 series in an asynchronous replication is 126. This is the same as the maximum number of NAS servers supported for the Dell Unity XT 380 series in general. Asynchronous replication is a method of replicating data between two Dell Unity systems with a configurable recovery point objective (RPO). It allows the source system to continue normal operations without waiting for the destination system to acknowledge the completion of the replication.
References: [Dell EMC Unity: Replication Technologies], [Dell EMC Unity: NAS Capabilities]
NEW QUESTION # 33
Which feature can be configured for a Dell Unity XT file system NFS share?
- A. Distributed File System
- B. Protocol Encryption
- C. Host Access Level
- D. Access-Based Enumeration
Answer: C
Explanation:
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]
NEW QUESTION # 34
What are two prerequisites when creating host configuration for NFS client? (Choose two.)
- A. Network Address
- B. Hostname
- C. Tenant information
- D. Subnet access
Answer: A,B
Explanation:
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
NEW QUESTION # 35
Which firewall ports are required to be open for a successful outbound connection when configuring integrated secure connect gateway?
- A. 80 and 443
- B. 9443 and 443
- C. 80 and 9443
- D. 443 and 8443
Answer: D
Explanation:
Explanation
The firewall ports that are required to be open for a successful outbound connection when configuring integrated secure connect gateway are 443 and 8443. Integrated secure connect gateway is a feature that enables secure remote access to the Dell Unity system through the Unisphere Central web portal. It requires an outbound connection from the Dell Unity system to the Unisphere Central server over the internet. Port 443 is used for HTTPS communication and port 8443 is used for WebSocket communication.
References: [Dell EMC Unity: Unisphere Overview], [Dell EMC Unity: Integrated Secure Connect Gateway]
NEW QUESTION # 36
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The Dell Unity Deploy 2023 Exam certification is targeted towards IT professionals who have experience in storage administration and are looking to expand their skills and knowledge in managing Dell Unity storage systems. By obtaining this certification, IT professionals can demonstrate their expertise in managing Dell Unity storage systems and enhance their career prospects in the field of storage and data management. The EMC D-UN-DY-23 certification exam is a valuable credential that can help IT professionals distinguish themselves in a competitive job market and gain recognition for their skills and expertise in managing Dell Unity storage systems.
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