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NEW QUESTION # 19
What are two prerequisites when creating host configuration for NFS client? (Choose two.)
- A. Subnet access
- B. Tenant information
- C. Hostname
- D. Network Address
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 # 20
Which disk format is recommended when deploying Dell UnityVSA OVA?
- A. Thick Provision Eager Zeroed
- B. Thin Provision
- C. Thick Provision Lazy Zeroed
Answer: A
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 # 21
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. Port 0 of I/O module 1
- C. Fibre Channel Port 4 of SPA and SPB www*
- D. Fibre Channel Port 0 of I/O module 0
Answer: C
NEW QUESTION # 22
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/write, enable Root
- B. Read/write
- C. Read-only
Answer: A
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 # 23
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. Restart Management Software
- B. Reboot Storage Processor
- C. Reinitialize
C Enable SSH
Answer: A
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 # 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: C
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
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. Perform Local LUN Move.
- B. Unmask the LUNfrom host.
- C. Chanqe Tierinq Policy to Auto-Tier.
- D. Disable the Data Reduction.
Answer: A
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 # 26
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?
- A. svc_initial_config
- B. svc_ipmi
- C. svc_change_hw_config
- D. svc_inject
Answer: A
Explanation:
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]
NEW QUESTION # 27
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?
- A. The Unity system time is not set correctly and must be updated under system settings.
- B. The Unity management server was not restarted before time zone changes took effect.
- C. Existing snapshot schedules are not updated to the same absolute time when the time zone is changed.
- D. Existing snapshot schedules cannot be updated to the same absolute time.
Answer: C
Explanation:
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.
NEW QUESTION # 28
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 # 29
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. Port 0 of I/O module 1
- C. Fibre Channel Port 4 of SPA and SPB www*
- D. Fibre Channel Port 0 of I/O module 0
Answer: C
Explanation:
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]
NEW QUESTION # 30
Which two actions are recommended according to best practices when connecting iSCSI host to a Dell Unity XT system? (Choose two.)
- A. Use private network for iSCSI interfaces.
- B. Manually register host on storage array.
- C. Use standard NIC for iSCSI.
- D. Interfaces should be on separate subnets.
Answer: A,D
Explanation:
Explanation
Two actions that are recommended according to best practices when connecting iSCSI host to a Dell Unity XT system are to ensure that the interfaces are on separate subnets and to use a private network for iSCSI interfaces. These actions can improve the performance, security, and availability of the iSCSI network. Having interfaces on separate subnets can prevent broadcast storms, reduce network congestion, and enable multipathing. Using a private network for iSCSI interfaces can isolate the iSCSI traffic from other network traffic, reduce the risk of interference or attacks, and simplify the network configuration. Manually registering host on storage array and using standard NIC for iSCSI are not recommended actions, as they can introduce errors, inefficiencies, and limitations.
References: [Dell EMC Unity: iSCSI Configuration], [Dell EMC Unity: Best Practices Guide]
NEW QUESTION # 31
What is the result of enabling Data Reduction on a LUN in a consistency group containing three LUNs?
- A. Any writes to the LUN will go through the Data Reduction logic.
- B. All writes to all consistency group LUNs will go through the Data Reduction logic.
- C. Data Reduction and Advanced Deduplication will be enabled on all LUNs.
- D. Data Reduction will be enabled on all LUNs is the consistency group.
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 # 32
Which I/O modules does the Unity 380/380F system support?
- A. 32 Gb/s Fibre Channel
10 GbE Base-T - B. 32 Gb/s Fibre Channel
2-Port 100 GbE - C. 12 Gb/s SAS
2-Port 100 GbE - D. 12 Gb/s SAS
10 GbE Base-T
Answer: D
Explanation:
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
NEW QUESTION # 33
Into what size slices is the LUN partitioned for RAID extents?
- A. 256 MB
- B. 512MB
- C. 64 MB
- 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 # 34
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EMC D-UN-DY-23 (Dell Unity Deploy 2023) Exam is a certification exam designed for IT professionals who are looking to validate their skills and knowledge in deploying and managing Dell EMC Unity storage systems. D-UN-DY-23 exam is intended to test the candidate's understanding of the Unity system architecture, installation and configuration, data protection and management, as well as troubleshooting and maintenance.
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