About the Exam

This Dell Proven Professional certification validates a strong understanding of Dell Unity and PowerStore midrange storage solutions. It is aimed at people who design solutions around Dell midrange storage arrays. The exam covers best practices, sizing, and key product features for these systems. Dell's exam updates document lists D-MSS-DS-23 as retired on August 11, 2023.

Exam Topics

  • Midrange Storage Solutions Best Practice36%
  • Dell Midrange Storage Solutions Planning, Sizing and Design40%
  • Dell Midrange Sizing Solutions24%

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Last updated December 3, 2025 at 11:06 PM

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QuestionQ1

Dell Midrange Storage Solutions Planning, Sizing and Design

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

  • A DataDobi
  • B SANCopy
  • C Rsync
Explanation

DataDobi DobiMigrate is a file-data migration solution supported for migrations from Dell EMC VNX platforms to Unity systems. SANCopy migrates block resources, and rsync is generally used for file-copy workflows in UNIX/Linux environments rather than as the intended Windows-host migration tool.

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QuestionQ2

Dell Midrange Sizing Solutions

What is the maximum number of thin clones permitted per base LUN in Dell Unity XT?

  • A 32
  • B 16
  • C 24
  • D 12
Explanation

Dell Unity XT limits each base LUN to 16 thin clones.

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QuestionQ3

Midrange Storage Solutions Best Practice

On which host operating systems can the Grab tool run?

  • A Linux, macOS, and Tru64
  • B Windows, UNIX, and ESXi
  • C OS/390, Windows, and Linux
  • D ESXi, ChromeOS, and OS/390
Explanation

Dell EMC Grab supports Windows and UNIX host environments, and Dell provides an ESXi Grab utility for collecting information from VMware ESXi hosts. This support does not extend to ChromeOS, OS/390, Tru64, or macOS.

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QuestionQ4

Dell Midrange Storage Solutions Planning, Sizing and Design

Which tool is used to remediate issues identified during a site evaluation?

  • A ECT
  • B CloudIQ
  • C Live Optics
  • D Grab
Explanation

The Environment Collection Tool (ECT) supports site-evaluation and remediation activities. By contrast, Live Optics collects and analyzes infrastructure data, CloudIQ provides monitoring and analytics, and Grab collects host configuration data.

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QuestionQ5

Dell Midrange Sizing Solutions

Which items are components of a Dell PowerStore Base Volume Family?

  • A Thin clones, snapshots, and original volume only
  • B Snapshots, original volume, and replication target only
  • C Thin clones, snapshots, original volume, and replication target
  • D Thin clones and snapshots only
Explanation

A Dell PowerStore base volume family consists of the founding production volume and all of its derivative snapshots and thin clones. Replication targets are not included in the base volume family definition.

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