[2024] Pass EMC D-UN-DY-23 Exam Updated 38 Questions
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NEW QUESTION # 20
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. Restart Management Software
- C. Reboot Storage Processor
Answer: B
NEW QUESTION # 21
Which is the preferred FC Port for synchronous replication for a Dell Unity XT 380 system?
- A. Fibre Channel Port 0 of I/O module 0
- B. Fibre Channel Port 4 of SPA and SPB www*
- C. Port 1 of I/O module 0
- D. Port 0 of I/O module 1
Answer: B
NEW QUESTION # 22
What is a characteristic of FAST VP?
- A. Fast VP optimizes data replacement by moving 1 GB slices between disk tiers.
- B. Fast VP data relocation runs in the background at all times once it is enabled.
- C. Users can enable or disable FAST VP at the LUN level.
- D. Users can set the Fast VP data relocation rate.
Answer: D
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 # 23
Which feature can be configured for a Dell Unity XT file system NFS share?
- A. Distributed File System
- B. Host Access Level
- C. Access-Based Enumeration
- D. Protocol Encryption
Answer: B
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 # 24
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 # 25
What is the result of enabling Data Reduction on a LUN in a consistency group containing three LUNs?
- A. All writes to all consistency group LUNs will go through the Data Reduction logic.
- B. Data Reduction and Advanced Deduplication will be enabled on all LUNs.
- C. Data Reduction will be enabled on all LUNs is the consistency group.
- D. Any writes to the LUN will go through the Data Reduction logic.
Answer: A
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 # 26
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 # 27
What is the maximum size of a drive partnership group when expanding a Dynamic Pool?
- A. 32 drives
- B. 84 drives
- C. 64 drives
- D. 96 drives
Answer: A
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
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?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
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.
NEW QUESTION # 29
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. Set Unisphere resource filtering to All.
- B. Set an RPO of 0 on the synchronous replication sessions.
- C. Configure the replication connection mode to Both.
- D. Configure the replication interfaces on the 4-port mezzanine card.
Answer: C
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 # 30
What does the Dell Unity XT system do after a NAS server starts outbound traffic to an external service?
- A. Uses the active production interface
- B. Uses Packet Reflect for outbound communication
- C. Creates an active interface buffer cache in DRAM
- D. Selects interfaces that are based on advance static routes
Answer: B
Explanation:
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
NEW QUESTION # 31
Which snapshot option is set automatically when a Pool is configured?
- A. Pool Automatic Deletion Policy
- B. Snapshot Pool Consumption
- C. Total Pool Consumption
Answer: A
Explanation:
Explanation
The snapshot option that is set automatically when a pool is configured is the Pool Automatic Deletion Policy.
This option determines how the system handles the deletion of snapshots when the pool reaches a certain threshold of capacity utilization. The user can choose between three policies: Never Delete, Delete Oldest, or Delete LowestPriority. The Total Pool Consumption and the Snapshot Pool Consumption are not snapshot options, but rather metrics that show the amount of pool space consumed by the pool data and the snapshots respectively.
References: [Dell EMC Unity: Storage Pools and RAID Groups], [Dell EMC Unity: Snapshots and Thin Clones]
NEW QUESTION # 32
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. Two iSCSI target interfaces must be configured with IP addresses from separate subnets.
- B. A connection must be established between the host iSCSI initiators and Unity iSCSI targets before provisioning the new LUN.
- C. Any single host should connect to any single array using one protocol only.
Answer: C
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 # 33
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 interface.
- D. Create replication connect.
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 # 34
A storage engineer was asked to restore a LUN snapshot using a previous copy.
What is the correct sequence of steps for a restore process?
Answer:
Explanation:
Explanation
https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h15089-dell_emc_unity-snapsho
NEW QUESTION # 35
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To earn the EMC D-UN-DY-23 certification, candidates must have a solid understanding of Dell Unity storage solutions and be able to demonstrate their ability to deploy and manage these solutions in complex environments. Dell Unity Deploy 2023 Exam certification is intended for IT professionals who are responsible for managing storage infrastructure and who have experience working with Dell Unity storage solutions. By earning this certification, IT professionals can demonstrate their expertise and commitment to the field and enhance their career opportunities in the highly competitive IT industry.
EMC D-UN-DY-23 exam is ideal for IT professionals who are responsible for managing data storage in their organizations, such as storage administrators, system engineers, IT managers, and consultants. By achieving this certification, professionals can enhance their career prospects and demonstrate their commitment to continuous learning and development in the field of data storage and management.
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