(Mar-2025) D-MSS-DS-23 Exam Dumps Contains FREE Real Quesions from the Actual Exam [Q19-Q37]

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(Mar-2025) D-MSS-DS-23 Exam Dumps Contains FREE Real Quesions from the Actual Exam

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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	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.
Topic 3	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.

QUESTION 19
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.
References:
* Dell Technologies Unity XT Replication Guide
* Dell Entry-Level and Mid-Range Storage Community

QUESTION 20
A customer has a Dell EMC SC9000 array with six SC420 enclosures running SCOS 7.3.
The enclosure configuration is as follows:
Two enclosures have write-intensive SSDs
Four enclosures have read-intensive SSDs
What is recommended as a general guideline for making spare drive assignments?

2 spare drives per shell

Dedicated spares are not required

2 spares per drive type per array

1 spare per drive type per shell

“SCOS 7.3, Distributed Sparing: eliminates the need for dedicated spares by giving customers the option to distribute sparing capacity across all drives in the array.”

QUESTION 21
What tools can be used to migrate block data from a legacy VNX array to a new Dell Unity XT array?

SANCopy and PowerPath Migration Enabler

EMCopy and SANCopy

PowerPath Migration Enabler and Rsync

Rsync and EMCopy

QUESTION 22
Which Dell Unity XT DPE front-end port connectivity can support to 45000 IOPS/port and up to 1500 MB/s?

16 Gb FC and 25 GbE iSCSI

25 GbE iSCSI

16 Gb FC

10 GbE iSCSI and 16 Gb FC

Dell Unity XT DPE (Disk Processor Enclosure) front-end port connectivity options that can support up to
45000 IOPS per port and up to 1500 MB/s include both 16 Gb Fibre Channel (FC) and 25 GbE iSCSI. These connectivity options provide the necessary performance and bandwidth to handle high IOPS and throughput demands:
* 16 Gb Fibre Channel (FC):Known for high performance and low latency, 16 Gb FC ports are widely used in enterprise storage environments to support high IOPS and bandwidth.
* 25 GbE iSCSI:25 Gigabit Ethernet iSCSI ports offer high-speed connectivity for IP-based storage networks, capable of supporting high throughput and IOPS requirements.
References:
* Dell Technologies Unity XT Specifications
* Dell Entry-Level and Mid-Range Storage Community

QUESTION 23
Which Dell EMC Midrange storage platforms support NVMe SCM drives?

PowerStore T and SC Series only

PowerStore T and PowerStore X

PowerStore T, Unity XT, and SC Series

PowerStore X, Unity XT, and SC Series

QUESTION 24
A customer has a Dell Unity XT 880.
The system has 700 drives with the following:
– 100x 1.6 TB 2.”; SSDs
– 600x 1.2 TB 2.”; SAS drives
What is the required minimum number of SAS buses per SP to support this solution?

QUESTION 25
For a PowerStore 3200T running Block Workloads, which two options does Sizer take into consideration to equate the performance for each workload? (Select 2)

Throughput

Frontend Performance Saturation

Response Time

Storage Performance Saturation

For a PowerStore 3200T running block workloads, the Sizer tool takes into consideration several factors to equate the performance for each workload. The two main options are:
* Throughput:This refers to the amount of data that can be processed by the system in a given period. It is a critical measure of the storage system’s capability to handle large volumes of data efficiently.
* Response Time:This metric measures the time taken to complete an I/O operation from the moment it is initiated. It is essential for assessing the performance of latency-sensitive applications.
These parameters help ensure that the storage solution is designed to meet the performance requirements of the workload, balancing between high throughput and low response times.
References:
* Dell Technologies PowerStore Sizer Tool Documentation

QUESTION 26
What is the maximum number of splits that can be performed for a workload in the PowerStore sizing tool using the split workload toggle?

QUESTION 27
A technical architect is working with a customer to design a Dell Unity XT solution. The customer is concemed about enabling the data reduction storage service. What system condition should the architect recommend for enabling data reduction?

Free capacity above 80%

CPU utilization above 80%

Free capacity at or less than 50% free capacity

CPU utilization at or less than 50%

QUESTION 28
A Dell EMC PowerStore customer plans to migrate storage volumes across appliances within a cluster. They want to use minimal effort to ensure that the appliance avoids reaching full capacity.
Which method is recommended?

Live Migrate

Assisted Migration

Resource Balance

Volume Placement

Assisted migration -In the background, the system periodically monitors storage resource utilization across the appliances. Migration recommendations are generated based on factors such as drive wear, appliance capacity, and health. If you accept a migration recommendation, a migration session gets automatically created.
Reference: https://www.dell.com/support/manuals/en-pk/powerstore-1000t/pwrstr-cfg- vols/migrate-storage-resources-to-another-appliance?guid=guid-2c5f6014-60e4-43ee-928f- b537c59da869&lang=en-us

QUESTION 29
A customer is using Dell Unity XT 880 storage with 120 HDD Drives, with 10% of flash capacity from flash drives in RAID 5. They have eight LUNs provisioned for bandwidth-oriented workload.
The workload is evenly split between two controllers, all available eight FC 32Gb/s ports. The customer is not able to reach more than 10 GB/s of read throughput.
What is the cause of this issue?

HDD drives saturated

Read cache saturated

Frontend saturated

SAS bus saturated

QUESTION 30
What are benefits of having a minimum of 5% flash component when designing a Dell Unity XT hybrid system?

Enhances data reduction efficiency ratios and minimizes CPU utilization.

Offsets some workload skew and accelerates metadata for buffer read misses.

Optimizes FAST Cache page granularity and speeds data movement between tiers.

Increases front-end queue depth and accelerates acknowledgments to hosts.

QUESTION 31
What is the maximum number of data drives that can be put in to a Dell PowerStore 1000T base enclosure?

The maximum number of data drives that can be put in to a Dell PowerStore 1000T base enclosure is 21. The Dell PowerStore 1000T has a 2U form factor, and it supports a maximum of
21 drives in the base enclosure. The drives can be either SAS or NVMe, and it’s important to keep in mind that the maximum capacity of the system depends on the type of drives that are used. It’s important to note that the PowerStore 1000T supports up to 2 expansion shelves that can hold an additional 21 drives each, for a maximum of 63 drives in total. Also, the PowerStore
1000T supports up to 4 NVRAM modules that are used to cache metadata and improve performance.

QUESTION 32
Which Dell EMC Midrange solution is configured for block storage with a built-in hypervisor?

Unity XT

PowerStore X

SC 9000

PowerStore T

The PowerStore X model configuration provides a hypervisor layer in addition to block storage.
Reference: https://www.dell.com/support/manuals/en-pk/powerstore-9000/pwrstr- v12n/virtualization-architecture-and-configuration?guid=guid-cd3afd8a-aaba-43f5-b80c- c14b844b50b8&lang=en-us

QUESTION 33
Which Dell PowerStore migration method is recommended to remediate an out of space condition?

Assisted Migration

Migrate

Live Migrate

Auto Placement

The assisted migration allows you to move data to a new storage pool with more capacity. This process can be done while the data is still online and accessible to hosts, and it allows you to add or replace drives, expand pools, and move data to a new array without any disruption.

QUESTION 34
You are sizing a new Dell EMC SC Series array. Upon analyzing the Live Optics report, you find the current system has a peak throughput of 4687 MB.
What is the minimum number of 10Gb iSCSI front-end ports required to meet the throughput needs?

QUESTION 35
What are the two biggest factors that determine IOPS when using SSDs in a Dell EMC SC Series array?

Current latency and queue depth

Application block size and overall throughput

Multi-tenant arrays and tier configuration

Read/write percentage and peak workload

The reason there is such a large range in the number of IOPS delivered by SSDs is the IOPS are truly dependent on the type of traffic the SC Series was designed to handle. The two biggest factors that will determine IOPS in an SSD environment are block size of the application and overall throughput. Reference: https://downloads.dell.com/manuals/common/sc-series- performance-availability-best-practices-dell-emc-4024-bp-sc_en-us.pdf

QUESTION 36
What is a key feature of the Dell EMC Future-Proof Storage Loyalty Program for Dell EMC SC Series arrays?

4:1 Performance Guarantee

4 Year Satisfaction Guarantee

4:1 Reduction Guarantee

4:1 Efficiency Guarantee

Dell EMC Flash Storage Efficiency Guarantee Dell EMC promises our flash arrays will provide a logical usable capacity at least four times the usable physical capacity of your purchased drives — or we’ll give you more drives at no charge.
https://www.delltechnologies.com/en-us/blog/dell-emc-flash-storage-efficiency/ Reference:
https://www.dell.com/pk/business/p/storage-sc-all-flash/pd

QUESTION 37
How many hierarchical snapshots are supported by Dell EMC PowerStore 9000X array?

0 levels deep for LUNs
0 levels deep for file systems

32 levels deep for LUNs
16 levels deep for file systems

10 levels deep for LUNs
10 levels deep for file systems

16 levels deep for LUNs
16 levels deep for file systems

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