Dell D-UN-DY-23 Online Practice Questions and Exam Preparation

Dell D-UN-DY-23 Online Questions & Answers

• Question 11:

  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?

  A. 17 min
  B. 7 min
  C. 5 min
  D. 15 min
  A. 17 min

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  Explanation/Reference:

  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.

• Question 12:

  Which two actions are recommended according to best practices when connecting iSCSI host to a Dell Unity XT system? (Choose two.)

  A. Manually register host on storage array.
  B. Use standard NIC for iSCSI.
  C. Interfaces should be on separate subnets.
  D. Use private network for iSCSI interfaces.
  C. Interfaces should be on separate subnets.
  D. Use private network for iSCSI interfaces.

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  Explanation/Reference:

  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]

• Question 13:

  What is the maximum number of drives on a traditional RAID Group?

  A. 64 drives
  B. 16 drives
  C. 8 drives
  D. 32 drives
  B. 16 drives

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  Explanation/Reference:

• Question 14:

  In an asynchronous replication, what is the maximum number of replicated NAS servers supported for the Dell Unity XT 380 series?

  A. 64
  B. 90
  C. 126
  D. 256
  C. 126

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  Explanation/Reference:

  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]

• Question 15:

  What is the purpose of a Proxy NAS server?

  A. Access snapshot replicas on the destination side of a replicated file resource.
  B. Increase performance for shared network connections that access NAS servers.
  C. Increase security of production NAS servers.
  D. Access snapshots for testing production NAS servers.
  A. Access snapshot replicas on the destination side of a replicated file resource.

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  Explanation/Reference:

  The purpose of a Proxy NAS server is to access snapshot replicas on the destination side of a replicated file resource. A Proxy NAS server is a temporary NAS server that is created on the destination system to mount a snapshot replica of a replicated file system. This allows the user to access the data on the snapshot replica for testing, recovery, or other purposes. A Proxy NAS server does not increase performance or security of production NAS servers, nor does it access snapshots for testing production NAS servers.

• Question 16:

  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. Reinitialize
  C. Enable SSH
  D. Reboot Storage Processor
  A. Restart Management Software

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  Explanation/Reference:

  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]

• Question 17:

  Which disk format is recommended when deploying Dell UnityVSA OVA?

  A. Thin Provision
  B. Thick Provision Lazy Zeroed
  C. Thick Provision Eager Zeroed
  C. Thick Provision Eager Zeroed

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  Explanation/Reference:

  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

• Question 18:

  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. Configure the replication connection mode to Both.
  C. Set an RPO of 0 on the synchronous replication sessions.
  D. Configure the replication interfaces on the 4-port mezzanine card.
  B. Configure the replication connection mode to Both.

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  Explanation/Reference:

  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]

• Question 19:

  Which are two ways to create an asynchronous replication session for a NAS server? (Choose two.)

  A. Use NAS server properties.
  B. Create replication connect.
  C. Use the NAS server wizard.
  D. Create replication interface.
  A. Use NAS server properties.
  C. Use the NAS server wizard.

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  Explanation/Reference:

  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]

• Question 20:

  DRAG DROP

  What is the correct sequence of steps to provision storage for SMB NAS clients?

  Select and Place:

  

  

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  Explanation/Reference:

  The correct sequence of steps to provision storage for SMB NAS clients is:

  1. Group hard drives into storage pools. This allows you to create a pool of storage resources that can be allocated to different types of storage objects, such as NAS servers, file systems, and LUNs.You can create different pools based on the performance and capacity requirements of your applications

  2. Create a NAS server for an existing pool. A NAS server is a logical entity that provides file-level access to clients using SMB, NFS, or FTP/SFTP protocols. You need to create a NAS server before you can create file systems and shares.You can specify the pool, network settings, domain membership, and other properties for the NAS server

  3. Create file systems and file system shares based on the supported NAS protocol. A file system is a logical container that stores files and folders on a NAS server. A file system share is a logical representation of a file system that can be accessed by clients using a specific protocol. For SMB NAS clients, you need to create SMB file system shares that support the SMB protocol.You can configure the share name, permissions, access policies, and other settings for the SMB share

  4. Map the shared file system to the client. This allows the client to access the files and folders on the SMB share using a drive letter or a UNC path.You can use the Windows Explorer or the net use command to map the shared file system to the client