EMC D-MSS-DS-23 Dumps

B.   UEMCLI

Answer DescriptionExplanation:

When evaluating an existing Dell Unity XT system configuration, telemetry files can be collected using UEMCLI and unity_telemetry_data collects. UEMCLI (Unisphere Command Line Interface) allows administrators to gather detailed configuration and performance data from the array. Additionally, unity_telemetry_data collects is used to gather comprehensive telemetry data which includes detailed performance and usage statistics crucial for analysis and troubleshooting.

D.   Drive Modules

Answer DescriptionExplanation:

Unity Designer is a tool used to design and configure Dell EMC Unity storage systems. Two of the key input parameters for Unity Designer are Block and File resources, which include configuring LUNs, NAS servers, and file systems, and Drive Modules, which refer to the physical drives and their configurations within the storage system.

[Reference:, Dell EMC Unity Designer User Guide., Dell EMC Unity Configuration Best Practices., ,

B.   80%

Answer DescriptionExplanation:

The simple performance path in the Dell Unity XT sizer tool uses predefined configurations to streamline the sizing process.

This path considers various parameters to estimate the achievable IOPS rate and overall system performance.

Drive Busy Percentage:

The simple performance path assumes a maximum of 80% drive busy percentage to determine the achievable IOPS rate.

This threshold ensures that the drives are utilized efficiently without overloading, balancing performance and longevity.

Other Percentages:

Lower percentages (50%, 60%, 70%) would be too conservative and might result in under-utilization of the system’s capabilities.

Dell Midrange Storage References:

Dell Unity XT documentation and sizer tool guides provide detailed information on performance metrics and assumptions used for sizing.

Community forums and support resources from Dell Technologies offer additional insights and user experiences.

References:

Dell Unity XT Sizer Tool Guide
Dell Community on Storage Performance

B.   ECT

Answer DescriptionExplanation:

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

C.   Create a single protection policy assigned to 30 volumes, each scheduled with a five minute shift from each other.

Answer DescriptionExplanation:

In a scenario where a customer needs to design a DR site with a 15-minute RPO using storage-based asynchronous replication, creating a single protection policy assigned to 30 volumes with a five-minute shift between each volume is the most stable design. This approach ensures that the replication load is evenly distributed over time, minimizing the impact on storage performance.

[Reference:, Dell PowerStore Asynchronous Replication Best Practices., Dell Technologies documentation on protection policies and replication strategies.

C.   Robocopy

Answer DescriptionExplanation:

File Data Migration Tools:

Migrating file data from legacy systems to new arrays requires reliable tools that can handle large volumes of data efficiently.

Robocopy for Windows Hosts:

Robocopy (Robust File Copy) is a powerful command-line tool in Windows that supports extensive options for copying and synchronizing files and directories.

It is well-suited for migrating file data from a legacy VNX array to a new Dell Unity XT array, ensuring data integrity and consistency.

Other Tools:

SANCopy: Used for SAN data migration and not specific to file data.
Rsync: Commonly used for Linux/Unix systems rather than Windows hosts.
Dell Midrange Storage References:

Dell Unity XT documentation and migration guides provide detailed instructions on using Robocopy for file data migration.
Community forums and support resources from Dell Technologies offer additional insights and best practices.
References:

Dell Unity XT Migration Guide
Dell Community on Data Migration

C.   15%

Answer DescriptionExplanation:

When designing a Dell Unity XT 480 using the System Designer option of Sizer, the recommended minimum amount of Flash to specify is 15%. This ensures that there is sufficient flash capacity to handle performance-intensive workloads and provides a good balance between performance and cost. Flash storage is crucial for achieving high IOPS and low latency in the storage system. Reference:Dell Unity XT Sizing Guide

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

Answer DescriptionExplanation:

The Unity Designer tool helps in designing storage solutions by taking specific inputs and generating detailed outputs. Here are the inputs and outputs of the Unity Designer tool:

Inputs:

Sales Order:Details about the customer’s purchase order.
Sizing XML File:An XML file that contains sizing information and requirements for the storage solution.
System Configuration PDF File:A PDF file that outlines the system configuration and specifications.
Outputs:

Detailed Design:A comprehensive design document that outlines the storage solution, including configuration details and recommended setups.
Excel Configuration Guide Report:An Excel report that provides a step-by-step guide for configuring the system based on the inputs provided.

References:

Dell Technologies Unity Designer Tool Documentation
Dell Entry-Level and Mid-Range Storage Community

B.   Random Read: 70% at 8 KiB Random Write: 30% at 8 KiB

Answer DescriptionExplanation:

When designing a system to support an Oracle OLAP (Online Analytical Processing) Workload for a new customer without specific I/O details, the default selections for the I/O profile input in the sizer tool are typically set to "Random Read: 70% at 8 KiB, Random Write: 30% at 8 KiB." Here’s a detailed explanation:

Oracle OLAP Workload Characteristics:OLAP workloads generally involve heavy read operations with a focus on retrieving and analyzing large datasets. The read operations are often random due to the nature of querying various parts of the data.

Default I/O Profile Selection:

Random Read:70% - This reflects the high read intensity typical of OLAP workloads, where data is accessed non-sequentially.
Random Write:30% - Although less frequent than reads, writes still occur randomly as new data is added or existing data is updated.

Sizer Tool Configuration:The Dell sizer tool uses these default I/O profile settings to estimate the required storage performance and capacity. This helps in designing a system that can handle the expected workload efficiently.

Performance Optimization:The chosen I/O profile ensures that the storage system is optimized for the specific access patterns of OLAP workloads, providing a balanced approach to handling both reads and writes.

References:

Dell Technologies PowerStore Documentation
Dell Entry-Level and Mid-Range Storage Community
Dell Storage Products Overview

By understanding the default I/O profile settings used by the sizer tool, system designers can ensure that the storage solution is well-suited to meet the demands of Oracle OLAP workloads.

A.   Before backups or nightly batch processing

Answer DescriptionExplanation:

Dell recommends scheduling FAST VP (Fully Automated Storage Tiering for Virtual Pools) relocations before backups or nightly batch processing to ensure optimal performance. This scheduling helps to avoid conflicts and performance degradation that can occur if relocation tasks compete for resources during critical data operations such as backups. Pre-scheduling these relocations ensures that the storage system is balanced and ready for intensive operations without impacting performance.