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Latest EMC D-UN-DY-23 Certification Practice Test Questions
To be eligible for the EMC D-UN-DY-23 certification exam, candidates must have a solid understanding of storage concepts and technologies, as well as experience in deploying storage solutions. D-UN-DY-23 exam consists of 60 multiple-choice questions and must be completed within 90 minutes. A passing score of 63% is required to achieve certification. Upon passing the exam, candidates will be awarded the Dell EMC Unity Deploy 2023 certification, which demonstrates their expertise in deploying and managing Dell EMC Unity storage systems. Dell Unity Deploy 2023 Exam certification is recognized globally and is highly valued by IT organizations seeking qualified professionals to manage their storage environments.
NEW QUESTION # 19
What is the result of enabling Data Reduction on a LUN in a consistency group containing three LUNs?
- A. Data Reduction will be enabled on all LUNs is the consistency group.
- B. All writes to all consistency group LUNs will go through the Data Reduction logic.
- C. Any writes to the LUN will go through the Data Reduction logic.
- D. Data Reduction and Advanced Deduplication will be enabled on all LUNs.
Answer: B
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 # 20
A storage engineer must grant access of a Dell Unity XT provisioned NFS datastore to ESXi-1.dell.local. The NAS server used to create the datastore is configured for NFSv4 protocol with Kerberos NFS owner authentication.
Which permission level is required for the ESXi host?
- A. Read-only
- B. Read/write
- C. Read/write, enable Root
Answer: C
Explanation:
Explanation
To grant access of a Dell Unity XT provisioned NFS datastore to an ESXi host, the permission level required for the host depends on the NFS protocol and authentication method used by the NAS server. For NFSv4 with Kerberos NFS owner authentication, the ESXi host must have the Read/write, enable Root permission level.
This allows the ESXi host to read and write data to the datastore, as well as perform administrative tasks such as creating and deleting virtual machines. The Read/write permission level alone is not sufficient, as it does not allow the ESXihost to perform root-level operations on the datastore. The Read-only permission level only allows the ESXi host to read data from the datastore, but not write or modify it. References: Dell EMC Unity:
Configuring hosts to access NFS1, page 9.
NEW QUESTION # 21
What are two prerequisites when creating host configuration for NFS client? (Choose two.)
- A. Tenant information
- B. Subnet access
- C. Network Address
- D. Hostname
Answer: C,D
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 # 22
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 # 23
An administrator has configured a Host Group to have access to a storage object.
What are two benefits of this configuration? (Choose two.)
- A. Ensures that block storage is replicated to the same hosts
- B. Provides multiple hosts access to the same LUNs
- C. Provides multiple hosts the same access to NFS Filesvstems
- D. Provides multiple hosts access to the same VMFS Datastores
- E. Ensures that snapshots are applied to all LUNs in the group
Answer: B,D
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 # 24
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. Reboot Storage Processor
- B. Restart Management Software
- C. Reinitialize
C Enable SSH
Answer: B
NEW QUESTION # 25
What is the maximum size of a drive partnership group when expanding a Dynamic Pool?
- A. 64 drives
- B. 32 drives
- C. 96 drives
- D. 84 drives
Answer: B
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 # 26
A storage administrator recently disabled the Advanced Deduplication on a LUN.
Which Dell Unity XT action can be used to remove the Advanced Deduplication savings from LUN?
- A. Unmask the LUNfrom host.
- B. Perform Local LUN Move.
- C. Chanqe Tierinq Policy to Auto-Tier.
- D. Disable the Data Reduction.
Answer: B
Explanation:
Explanation
When Advanced Deduplication is disabled on a LUN, the existing data that was deduplicated remains in its reduced state, and only new data written to the LUN is not deduplicated. To remove the Advanced Deduplication savings from the LUN, the administrator must perform a Local LUN Move operation, which copies the data from the source LUN to a destination LUN without deduplication. The destination LUN must have Advanced Deduplication disabled, and must be in the same storage pool as the source LUN. After the Local LUN Move is completed, the source LUN can be deleted and the destination LUN can be renamed as the original LUN. References: Dell Unity: Data Reduction2, page 9.
NEW QUESTION # 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?
- A. 3.58 TB
- B. 3.2 TB
- C. 1.39 TB
- D. I6.0 TB
Answer: A
Explanation:
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]
NEW QUESTION # 28
Which feature can be configured for a Dell Unity XT file system NFS share?
- A. Host Access Level
- B. Protocol Encryption
- C. Access-Based Enumeration
- D. Distributed File System
Answer: A
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 # 29
Which disk format is recommended when deploying Dell UnityVSA OVA?
- A. Thick Provision Lazy Zeroed
- B. Thin Provision
- C. Thick Provision Eager Zeroed
Answer: C
Explanation:
Explanation
When deploying Dell UnityVSA OVA, the recommended disk format is Thick Provision Eager Zeroed, which allocates and zeroes out all the space for the virtual disks at the time of creation. This ensures better performance and avoids potential issues with thin provisioning on the underlying storage. Thin Provision and Thick Provision Lazy Zeroed are not recommended, as they may cause performance degradation and unexpected out-of-space errors.
References: [Dell EMC UnityVSA Installation Guide], [Dell EMC UnityVSA Best Practices Guide]
NEW QUESTION # 30
Multiple I/O modules must be installed in Dell Unity XT 680 storage.
Which module must be installed in slot 0?
- A. 12 Gb/s SAS back-end
- B. 4-Port 16 Gb Fibre Channel
- C. 4-Port 25 Gbps Ethernet
- D. 4-Port 10 Gbps Ethernet
Answer: A
Explanation:
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
NEW QUESTION # 31
What is a benefit of using vVols?
- A. They enable the automatic import of capability profiles from vSphere to Unisphere.
- B. They enable the assignment of isolated file storage partitions.
- C. All VMs on a datastore are snapped simultaneously.
- D. Individual VMs on a datastore can be snapped.
Answer: D
Explanation:
Explanation
A benefit of using vVols is that individual VMs on a datastore can be snapped. vVols are virtual volumes that are stored on a storage array and managed by vSphere. They enable granular control and management of VM storage. With vVols, each VM has its own set of virtual disks that are mapped to corresponding storage objects on the array. This allows the array to perform snapshot operations on individual VMs without affecting other VMs on the same datastore.
References: [Dell EMC Unity: VMware vSphere Virtual Volumes (vVols) Implementation]
NEW QUESTION # 32
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 # 33
What is the maximum number of drives on a traditional RAID Group?
- A. 8 drives
- B. 64 drives
- C. 32 drives
- D. 16 drives
Answer: D
Explanation:
Explanation
The maximum number of drives on a traditional RAID group depends on the RAID type and the drive type.
For RAID 5 and RAID 6, the maximum number of drives is 16 for all drive types. For RAID 1/0, the maximum number of drives is 32 for SAS and NL-SAS drives, and 16 for SSD drives. References: Dell EMC Unity: Best Practices Guide2, page 17.
NEW QUESTION # 34
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The EMC D-UN-DY-23 exam is administered by Dell Technologies Education Services and is one of the requirements for obtaining the Dell EMC Unity Solutions Specialist certification. Dell Unity Deploy 2023 Exam certification is recognized globally and is highly valued by employers in the IT industry. Achieving this certification validates the candidate's ability to successfully deploy, manage and troubleshoot Dell EMC Unity storage systems, which are widely used in enterprise environments.
To take the Dell Unity Deploy 2023 exam, candidates must have a good understanding of Dell Unity storage systems and be familiar with the latest industry best practices. They should have experience in deploying and managing Dell Unity systems, and be able to troubleshoot issues that may arise during the deployment process. Additionally, candidates should be able to design and implement solutions that meet the needs of their organization, while ensuring that the system is secure and reliable.
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