Feb-2026 FREE EMC D-MSS-DS-23 PRACTICE QUESTIONS AND ANSWERS UPDATES [Q15-Q35]

Posted On February 2, 2026

Feb-2026 FREE EMC D-MSS-DS-23 PRACTICE QUESTIONS AND ANSWERS UPDATES

DEMO FREE BEFORE YOU BUY D-MSS-DS-23 DUMPS

EMC D-MSS-DS-23 Exam Syllabus Topics:

Topic	Details
Topic 1	Dell Midrange Sizing Solutions: This section of the exam measures the skills of storage engineers and covers the use of tools like the Midrange Sizer for Unity to size solutions effectively. It includes design methods and deliverables associated with sizing storage solutions.
Topic 2	Dell Midrange Storage Solutions Planning, Sizing, and Design: This section of the exam measures the skills of storage engineers and covers the planning, sizing, and design phases of a Midrange solution sales engagement. It emphasizes conducting site evaluations and remediation processes while considering performance parameters and environmental limits. A critical skill evaluated is accurately characterizing workloads to inform design decisions.
Topic 3	Midrange Storage Solutions Best Practice: This section of the exam measures the skills of Dell Unity and PowerStore Midrange Storage Solutions professionals and covers best practice recommendations for system configuration and upgrades. It includes guidelines on hardware capacity, deployment models, clustering, and operating system upgrades. A key skill assessed is implementing effective backend connectivity solutions that enhance system performance.

QUESTION 15
What is the maximum throughput per port in backend 12 GB SAS ports in Dell Unity XT arrays?

2,000 Mbps

2,500 Mbps

25,000 Mbps

250 Mbps

The maximum throughput per port in backend 12 Gb SAS (Serial Attached SCSI) ports in Dell Unity XT arrays is 2500 Mbps. SAS ports are used to connect storage devices and provide high- speed data transfer capabilities:
12 Gb SAS Standard: The 12 Gb SAS standard supports high data transfer rates, making it suitable for enterprise storage systems that require robust performance and reliability.
Performance Metrics: Each 12 Gb SAS port can achieve up to 2500 Mbps, which translates to approximately 2.5 Gbps of throughput, supporting high-performance storage operations.

QUESTION 16
A customer is planning to use the storage system with the following requirements obtained from an existing landscape:
Capacity: 100TB
R/W ratio: 67/33
Average block size: 8K
IOPS: 50000
Which Midrange Size option must be used for storage sizing?

System Designer

Application Oriented

Simple Performance

QUESTION 17
A Dell EMC PowerStore customer wants to schedule snapshots daily at 6 AM. Which snapshot frequency interval (in minutes) is available?

Reference: https://www.delltechnologies.com/en-us/collaterals/unauth/white- papers/products/storage/h18156-dell-emc-powerstore-snapshots-thin-clones.pdf (27)

QUESTION 18
Which describes cascade replication on the Dell Unity XT platform?

Synchronous replication of a block resource from Sites A to B, then B to C, then C to D

Synchronous replication of a file resource from Sites A to B, then B to C, then C to D

Asynchronous replication of a file resource from Sites A to B, then B to C, then C to D

Asynchronous replication of a block resource from Sites A to B, then B to C, then C to D

https://www.dell.com/support/manuals/en-id/unity-600/unity_p_replication_config/about-replication?
guid=guid-ccd6033f-680e-47ca-bf91-fa3d4221f9d3&lang=en-us

QUESTION 19
What command is used to gather data from Brocade switches?

show tech-support details

supportshow

show all

QUESTION 20
Which two parameters avoid bottlenecks and improve performance when sizing Dell Unity XT storage solutions? (Select 2)

Network Bandwidth

Port Utilization

Port load balancing

Network Latency

Workload Types

When sizing Dell Unity XT storage solutions, avoiding bottlenecks and improving performance can be achieved by considering the following parameters:
Port Utilization: Ensuring that the storage system’s ports are utilized efficiently helps in distributing the workload evenly across available resources, preventing any single port from becoming a bottleneck.
Workload Types: Understanding and categorizing different workload types (e.g., random vs.
sequential, read vs. write) allows for better allocation of resources and tuning of the storage system to handle specific performance requirements.

QUESTION 21
A PowerStore system has been successfully designed in PowerSizer, and the configuration must be created for the customer.
What is the most time-efficient way to generate the proposal?

Export configuration in PowerSizer.
Download XML file with storage configuration.
Import XML file in Configuration tool.

Export configuration in PowerSizer.
Download PPTX export files.
Open PPTX file.
Copy PowerStore configuration ID.
Paste configuration number in Configuration tool.

Export configuration in PowerSizer.
Copy PowerStore configuration ID.
Paste configuration number in Configuration tool.

Export configuration in PowerSizer.
Download PPTX export files.
Import PPTX file into configuration tool.

QUESTION 22
Which tool is used to remediate issues discovered during a site evaluation?

CloudIQ

ECT

Live Optics

Grab

The tool used to remediate issues discovered during a site evaluation is ECT (ESRS Configuration Tool). ECT is a diagnostic and remediation tool provided by Dell that assists in configuring and troubleshooting ESRS (Secure Remote Services), which is essential for proactive monitoring and support of Dell EMC systems. ECT helps ensure that any identified issues during site evaluations are addressed effectively. Reference:Dell ESRS Overview

QUESTION 23
What final operation should be performed after adding a single drive to a Dell Powerstore array?

Add it to an existing DRS

Format the drive

Back up the Keystore

Verify drive operation

This ensures that the drive is properly connected and communicating with the array, and that it is functioning as expected. Additionally, the new drive should be added to an existing DRS (Drive Replacement Set) and if necessary, the keystore should be backed up and the drive should be formatted.

QUESTION 24
An administrator wants to use NAS Server Mobility to move a NAS server from SPA to SPB on a Dell Unity system.
What consideration must they be aware of?

DNS configuration will be lost after the move

NAS Server Mobility is no longer supported following a software update

Any replication sessions must be in a paused state before starting the move

The system must be in service mode to complete the move

When using NAS Server Mobility to move a NAS server from SPA to SPB on a Dell Unity system, an administrator must be aware that any replication sessions must be in a paused state before starting the move. This means that any data replication sessions that are configured for the NAS server must be temporarily stopped to avoid data inconsistencies or data loss during the move.
Once the move is complete, the replication sessions can be resumed, and data replication will continue as normal. NAS Server Mobility is still supported by Dell Unity, so it’s not a concern of the move. The system does not need to be in service mode to complete the move, and the DNS configuration won’t be lost after the move, the administrator should make sure that the DNS entries for the NAS server are updated to reflect the new location.

QUESTION 25
An architect is designing a cost-effective PowerStore solution in sizer that is expected to perform in the event of a node failure without impacting the max performance. What must be considered?

Set Max Performance Saturation to 50% while sizing.

Plan and design a disaster recovery site.

Set Performance Growth to 50% while sizing.

Provide a higher model than the sizer-recommended solution.

Designing for Node Failure:
Ensuring a PowerStore solution performs optimally even in the event of a node failure requires careful consideration of performance thresholds.
Max Performance Saturation:
Setting the Max Performance Saturation to 50% during the sizing process ensures that in the event of a node failure, the remaining node can handle the load without performance degradation.
This conservative approach allows the system to operate within safe performance limits, maintaining high availability and performance.

QUESTION 26
Which describes cascade replication on the Dell Unity XT platform?

Synchronous replication of a block resource from Sites A to B, then B to C, then C to D

Synchronous replication of a file resource from Sites A to B, then B to C, then C to D

Asynchronous replication of a file resource from Sites A to B, then B to C, then C to D

Asynchronous replication of a block resource from Sites A to B, then B to C, then C to D

Cascade replication on the Dell Unity XT platform describes the process where a block resource is replicated asynchronously from one site to another in a sequential manner. Here’s how it works:
Site A to Site B: The block resource is first replicated asynchronously from Site A to Site B.
Site B to Site C: After the replication from A to B is complete, the resource is then replicated from Site B to Site C.
Site C to Site D: Finally, the resource is replicated from Site C to Site D.
This cascade replication method allows for efficient data protection and disaster recovery across multiple sites.

QUESTION 27
When sizing a Dell EMC Unity Hybrid array, what are considerations for growth?

Port utilization and load balancing

Cache utilization and hardware bottlenecks

Latency and queue depth

General capacity and active data

Considerations for capacity growth (click) Overall growth vs active data growth (click) Moving or expanding “hot blocks” of active data Longer term planning for growth

QUESTION 28
Which front-end protocol card in Dell Unity XT 380 offloads processing to save CPU cycles for other operations?

Fibre Channel

CNA fonSCSI

SAS

CNA for Fibre Channel

(Converged Network Adapter for iSCSI) is the front-end protocol card in Dell Unity XT 380 that offloads processing to save CPU cycles for other operations. It enables the Unity XT 380 to handle iSCSI traffic, which reduces the workload on the host server’s CPU and improves overall system performance.

QUESTION 29
What are all the capabilities of a Dell Unity XT hybrid system that optimize for workload skew?

FAST Cache, Cache, and HDDs

FAST VP and Cache

Cache, FAST Cache, and FAST VP

HDDs and FAST Cache

QUESTION 30
Which path of the sizer tool for Dell Unity XT uses predefined configurations that are based on array model, capacity points, random workloads, RAID type, and drive type?

Advanced Performance

Quick Configuration

Simple Performance

System Designer

* Sizer Tool Paths:
* The Dell Unity XT sizer tool offers multiple paths for configuring storage solutions, each tailored to different user needs and expertise levels.
* Quick Configuration:
* The Quick Configuration path uses predefined configurations based on array model, capacity points, random workloads, RAID type, and drive type.
* This path simplifies the sizing process by providing users with recommended configurations that align with common use cases and performance requirements.
* Other Paths:
* Advanced Performance: Allows for detailed customization of performance parameters.
* Simple Performance: Focuses on basic performance metrics without predefined configurations.
* System Designer: Provides comprehensive design options for complex scenarios.
* Dell Midrange Storage References:
* Dell Unity XT documentation provides detailed guidelines on using the sizer tool and the different configuration paths available.
* Additional resources from Dell Technologies’ support and community forums offer insights into best practices for using the sizer tool.
References:
* Dell Unity XT Sizer Tool Guide
* Dell Community on Storage Sizing

QUESTION 31
Which tool can be used to migrate file data for Windows hosts form a legacy VNX array to a new Dell Unity XT array?

Robocopy

SANCopy

rsync

QUESTION 32
What is the maximum supported drive configuration in the base enclosure of the PowerStore
3200T?

23xNVMe SCMs 2 x NVMe NVRAM

21 x NVMe SSDs 2 x NVMe NVRAM

23 x NVMe SSDs 2 x NVMe NVRAM

21 x NVMe SCMs 4 x NVMe NVRAM

The maximum supported drive configuration in the base enclosure of the PowerStore 3200T includes 23 NVMe SSDs and 2 NVMe NVRAM. This configuration provides high performance and low latency, suitable for demanding workloads.

QUESTION 33
What tabs are available on the Dell EMC PowerStore Manager Dashboard?

Health. Overview. Performance, and Capacity

Health, Efficiency. Performance, and Summary

Performance. Efficiency, and Capacity only

Performance. Overview, and Capacity only

These categories are divided in tabs: Overview, Capacity, and Performance.
Reference: https://volumes.blog/2020/05/07/what-is-powerstore-part-6-powerstore-user-interface/

QUESTION 34
What are the inputs and outputs of the Unity Designer tool?

Inputs: Sales order, Excel configuration guide report, Detailed design Outputs: Sales order, Sizing XML file, System configuration PDF file

Inputs: Sales order, Detailed designExcel configuration guide report Outputs: Sizing XML file, System configuration PDF file

Inputs: Sales order, Sizing XML file, System requirements Excel file Outputs: Detailed designExcel configuration guide report, System configuration PDF file

Inputs: Sales order, Sizing XML file, System configuration PDF file Outputs: Detailed designExcel configuration guide report

QUESTION 35
A customer must provision file systems on a Dell Unity XT 480F for a test environment A dynamic pool will be configured with RAID 5……
What is the minimum drive count necessary to create to create this pool?