Dell EMC D-UN-DY-23 Exam Practice Test Instant Access

Question 1

What is the purpose of a Proxy NAS server?

AAccess snapshot replicas on the destination side of a replicated file resource.

BIncrease performance for shared network connections that access NAS servers.

CIncrease security of production NAS servers.

DAccess snapshots for testing production NAS servers.

Answer : A

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 2

What is a characteristic of FAST VP?

AFast VP data relocation runs in the background at all times once it is enabled.

BFast VP optimizes data replacement by moving 1 GB slices between disk tiers.

CUsers can set the Fast VP data relocation rate.

DUsers can enable or disable FAST VP at the LUN level.

Answer : C

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.

Question 3

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?

AUnmask the LUNfrom host.

BPerform Local LUN Move.

CChanqe Tierinq Policy to Auto-Tier.

DDisable the Data Reduction.

Answer : B

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.Reference: Dell Unity: Data Reduction2, page 9.

Question 4

Which disk format is recommended when deploying Dell UnityVSA OVA?

AThin Provision

BThick Provision Lazy Zeroed

CThick Provision Eager Zeroed

Answer : C

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.

Question 5

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?

ATwo iSCSI target interfaces must be configured with IP addresses from separate subnets.

BAny single host should connect to any single array using one protocol only.

CA connection must be established between the host iSCSI initiators and Unity iSCSI targets before provisioning the new LUN.

Answer : B

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.Reference: Dell EMC Unity: Best Practices Guide1, page 19.

Question 6

A deployment engineer has changed the Schedule Time Zone under the Settings menu. However, existing snapshots schedules continue to run at the previously configured time.

Why is this occurring?

AExisting snapshot schedules cannot be updated to the same absolute time.

BThe Unity system time is not set correctly and must be updated under system settings.

CExisting snapshot schedules are not updated to the same absolute time when the time zone is changed.

DThe Unity management server was not restarted before time zone changes took effect.

Answer : C

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 in GMT+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.Reference: Dell EMC Unity: Snapshots and Thin Clones1, page 16.

Question 7

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?

ASet Unisphere resource filtering to All.

BConfigure the replication connection mode to Both.

CSet an RPO of 0 on the synchronous replication sessions.

DConfigure the replication interfaces on the 4-port mezzanine card.

Answer : B

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.

Dell EMC Dell Unity Deploy 2023 D-UN-DY-23 Exam Practice Test