Dell EMC D-MSS-DS-23 Dell Midrange Storage Solutions Design 2023 Exam Practice Test

Answer : D

My Work Environmental Reports' typically cover essential configuration details relevant to Dell storage solutions, including switch configuration and host configuration. These reports are designed to ensure that the environment is set up correctly for optimal performance and interoperability with Dell storage products.

Dell Technologies documentation on My Work Environmental Reports.

Dell Midrange Storage best practices guide.

Answer : C

An automatic NAS server failover to the peer Storage Processor (SP) is initiated by an SP hardware fault. This failover mechanism ensures high availability and continuous access to data by moving the NAS server's operations to the functioning SP when a hardware fault is detected in the primary SP.

Dell EMC Unity NAS Server High Availability Guide.

Dell Technologies documentation on NAS server failover.

Answer : D

Two key attributes that characterize I/O workloads for sizing the PowerStore storage solution are Random vs. Sequential I/O and Read vs. Write ratios. Understanding these attributes helps in accurately sizing the storage system to meet performance and capacity requirements.

Dell EMC PowerStore Sizing Guide.

Dell Technologies documentation on I/O workload characterization

Answer : C

Understanding DRR (Data Reduction Ratio):

The Data Reduction Ratio (DRR) is a measure used in storage solutions to determine the efficiency of data reduction technologies such as deduplication and compression.

In NVMe-based systems like PowerStore, achieving an optimal DRR is crucial for balancing capacity and performance.

Sizing PowerStore Solutions:

When sizing a PowerStore solution, it's essential to align the provided capacity and performance (IOPS) with the customer's requirements.

If the recommended solution vastly exceeds the requested capacity (10 times more in this case), it indicates an overly conservative DRR assumption.

Recommended Action:

The architect should adjust the DRR to reflect a more accurate estimate that aligns with the customer's actual data reduction potential.

This adjustment ensures that the solution is cost-effective and meets the performance criteria without excessive over-provisioning.

Dell Midrange Storage Reference:

Dell Technologies documentation on PowerStore solutions provides detailed guidelines on DRR configurations and best practices.

Resources include sizing tools, system editor settings, and real-world case studies that illustrate appropriate DRR adjustments.

Dell PowerStore Overview

Dell Community on Midrange Storage

Dell Storage Product Information

Answer : A

When sizing a Dell Unity XT solution using the Simple Performance method, parameters such as Read size (KB) and Target IOPS can be defined. The Simple Performance method focuses on understanding the expected IOPS (Input/Output Operations Per Second) and read size to ensure that the system is sized appropriately to meet performance requirements. This approach helps in configuring the storage system to handle the expected workload efficiently.

Answer : D

Skew refers to the non-uniform distribution of I/O over storage capacity. In storage systems, skew is an important factor to consider as it indicates that certain areas of the storage receive more I/O operations than others. This can lead to performance hotspots and affect the overall efficiency of the storage system. Managing skew is essential to ensure balanced performance across the storage array. Reference: Dell Midrange Storage Performance Guide

Answer : A, D

For a PowerStore 5200T system with a mixed SSD and SCM (Storage Class Memory) drive combination, the following statements are correct:

Expansion Enclosures are supported: PowerStore 5200T supports expansion enclosures, allowing for the addition of more drives to increase storage capacity and performance. This flexibility is crucial for scaling the storage system to meet growing data requirements.

SCM drives do not add to usable capacity: SCM drives in the PowerStore 5200T are primarily used for caching purposes rather than for adding to the system's usable capacity. These drives improve performance by accelerating data access times but do not contribute directly to the overall storage capacity.

Dell Technologies PowerStore 5200T Documentation

Dell Entry-Level and Mid-Range Storage Community