[May 10, 2026] 100% Real & Accurate D-MSS-DS-23 Questions with Free and Fast Updates
Self-Study Guide for Becoming an Dell Midrange Storage Solutions Design 2023 Expert
EMC D-MSS-DS-23 Exam Syllabus Topics:
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NEW QUESTION # 10
What chunk size of data is identified and moved temporarily to FAST Cache within Unity?
- A. 32KB
- B. 64 KB
- C. 256KB
- D. 128KB
Answer: B
NEW QUESTION # 11
How are vVol datastores mounted in Dell EMC PowerStore storage during the creation of vVol datastores in the vSphere environment shared by ESXi hosts?
- A. Storage Groups
- B. Volume Groups
- C. Storage containers
- D. VMFS datastores
Answer: C
Explanation:
A storage container is used to present vVol storage from a PowerStore cluster to vSphere.
vSphere mounts the storage container as a vVol datastore and makes it available for VM storage.
When a PowerStore cluster is used to provide VM storage, user VMs should be provisioned on the vVol datastores. The default storage container is mounted automatically on the nodes of the cluster.
NEW QUESTION # 12
Which describes cascade replication on a Dell Unity XT?
- A. Asynchronous replication of a block resource from Sites A to B then B to C then C to D
- B. Synchronous replication of a block resource from Sites A to B. then B to C. then C to D
- C. Synchronous replication of a file resource from Sites A to B. then B to C then C to D
- D. Asynchronous replication of a file resource from Sites A to B then B to C. then C to D
Answer: D
Explanation:
Cascade replication refers to the replication of data from one site to another, in a sequential or cascading manner. In the case of Dell Unity XT, cascade replication refers to the asynchronous replication of a file resource from one site (site A) to another (site B), then from site B to another site (site C) and so on. This means that data is replicated from one site to another in an orderly fashion, and each site functions as both a source and a target for replication. This allows for multiple copies of the data to be kept in different locations, providing increased data availability and disaster recovery capabilities. It's important to note that cascade replication can also be used for block resources but is usually asynchronous.
NEW QUESTION # 13
A customer has implemented five new Dell PowerStore 1000T model arrays for remote office sites. The arrays are going to need more capacity than originally thought What NVRAM considerations must be evaluated before adding the new capacity?
- A. The 1000T only supports two NVRAM modules
- B. Use the DSA ordering system to determine if more NVRAM is supported for the PowerStore model
- C. Use the Dell PowerStore Manager Ul to determine if more NVRAM is needed
- D. Another NVRAM is only needed if adding an expansion shelf
Answer: C
Explanation:
It's important to check if more NVRAM is needed before adding new capacity to ensure that the system has enough resources to handle the increased workload. The Dell PowerStore Manager UI can provide information on the current NVRAM usage and capacity, and can also be used to order additional NVRAM if needed.
NEW QUESTION # 14
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 (4+1) protection to match the production pool. The used tier contains only SAS Flash 3 drives. What is the minimum drive count necessary to create this pool?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
* Dynamic Pool Configuration with RAID 5:
* RAID 5 (4+1) protection involves 4 data drives and 1 parity drive.
* Minimum Drive Count:
* For creating a dynamic pool with RAID 5 (4+1), the configuration must include at least 2 RAID 5 (4+1) groups to ensure redundancy and performance.
* The minimum drive count for this setup would be 2 * (4 + 1) + 1 (hot spare) = 11 drives.
* RAID 5 Requirements:
* This configuration ensures that the dynamic pool has enough drives to maintain performance and data protection according to Dell's best practices.
* Dell Midrange Storage References:
* Dell Unity XT documentation provides detailed guidelines on RAID configurations and the minimum drive requirements for dynamic pools.
* Community forums and support resources from Dell Technologies offer insights into best practices for configuring RAID and dynamic pools.
References:
* Dell Unity XT RAID Configuration Guide
* Dell Community on Storage Configurations
NEW QUESTION # 15
What is a Dell recommendation when connecting ESXi hosts to PowerStore?
- A. Disable DelayedACK when configured using iSCSI.
- B. Configure Round Robin Multipathing with an IOPS limit of 1024.
- C. Use the default 32k host I/O size when using VMware NFS Datastores.
- D. Configure a minimum of two NAS servers when using vVol Datastores.
Answer: A
Explanation:
Dell recommends disabling DelayedACK when configuring ESXi hosts using iSCSI to connect to PowerStore systems. DelayedACK can cause performance degradation and connectivity issues in iSCSI environments. By disabling DelayedACK, the communication between the ESXi host and the PowerStore array becomes more efficient, leading to better performance and reliability.
Reference:
Dell Technologies documentation on best practices for configuring ESXi hosts with PowerStore using iSCSI.
VMware KB article on DelayedACK and its effects on iSCSI performance.
NEW QUESTION # 16
Which methods are available to migrate storage resources from one Dell PowerStore appliance to another within the same cluster?
- A. Migrate and Assisted Migration
- B. Volume Motion and Live Migrate
- C. Assisted Migration and Live Migrate
- D. Assisted Migration and Volume Motion
Answer: D
Explanation:
The Dell PowerStore appliance provides two methods to migrate storage resources within the same cluster: Assisted Migration and Volume Motion.
Assisted Migration: This method allows the administrator to manually initiate and control the migration process, and it allows for the migration of individual resources such as LUNs, file systems and snapshots.
Volume Motion: This method allows the administrator to move a LUN or file system from one storage pool to another on the same PowerStore appliance or within the same cluster. This is done without any disruption to the hosts accessing the data and it can be automated with the use of policies. It's important to note that the Live Migrate and Migrate options are not available to migrate storage resources within the same cluster in Dell PowerStore.
NEW QUESTION # 17
You are upgrading a Dell EMC Unity array to a Dell EMC PowerStore 1000 T array. The customer asks what they need to do so they can map PowerStore snapshots from the new PowerStore array to a host.
What should be your response?
- A. Create a thin clone of the snapshot
- B. Create a copy of the snapshot
- C. Create a read/write snapshot of the snapshot
- D. Create a volume group of the snapshot.
Answer: A
Explanation:
"Volume and Volume Group Snapshots: Snapshots cannot be mapped to a host. To view the contents of a snapshot, you must first clone the snapshot then map the clone to a host."
NEW QUESTION # 18
What does the Storage Performance Saturation field show in the Configurations tab of the PowerStore sizing tool in a Multi-Appliance solution?
- A. Maximum Performance
- B. Aggregate of all capacity
- C. Aggregate of all workloads
- D. Maximum usable capacity
Answer: C
Explanation:
Understanding Storage Performance Saturation:
In the Configurations tab of the PowerStore sizing tool, the Storage Performance Saturation field provides crucial information about the overall performance demand placed on the storage solution.
Multi-Appliance Solution Context:
When working with a multi-appliance PowerStore solution, it is important to assess the combined performance demands of all workloads across the appliances.
Aggregate of All Workloads:
The Storage Performance Saturation field shows the aggregate performance demand of all workloads combined. This helps in determining if the current configuration can handle the cumulative IOPS and throughput requirements or if additional resources are needed.
NEW QUESTION # 19
What is the maximum number of snapshot rules that can be associated with a Dell PowerStore protection policy?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 20
A company has a Dell Unity XT 880 at its Boston site providing file storage for a business production application. The company has a second remote site 8 km (5 mi) away in Cambridge. A third site is in New York (342 km (213 mi) from the Boston site). How can the same production data be protected against system outage with a zero RPO and a maximum of 15 minutes RPO data recovery?
- A. Synchronous replicate from Boston to Cambridge Asynchronous replicate from Boston to New York
- B. Asynchronous replicate from Boston to Cambridge Asynchronous replicate from Cambridge to New York
- C. Synchronous replicate from Boston to Cambridge Synchronous replicate from Boston to New York
- D. Synchronous replicate from Boston to Cambridge Synchronous replicate from Cambridge to New York
Answer: A
Explanation:
* Dell Unity XT offers both synchronous and asynchronous replication to protect data and ensure business continuity.
* Synchronous replication is used for zero RPO, ensuring no data loss, but it is typically limited to shorter distances due to latency concerns.
* Asynchronous replication is suitable for longer distances and provides near real-time data protection with a minimal RPO.
* Distance Considerations:
* The distance between Boston and Cambridge (8 km) is suitable for synchronous replication, providing zero RPO.
* The distance between Boston and New York (342 km) is better suited for asynchronous replication due to latency, ensuring data recovery with a minimal RPO, such as 15 minutes.
* Optimal Replication Strategy:
* Synchronous replication from Boston to Cambridge ensures zero RPO for critical data protection.
* Asynchronous replication from Boston to New York provides additional data protection with a
15-minute RPO, suitable for longer-distance disaster recovery.
* Dell Midrange Storage References:
* Dell Unity XT documentation and best practices provide detailed guidelines on configuring synchronous and asynchronous replication.
* Community forums and support resources from Dell Technologies offer insights into real-world implementation strategies.
References:
* Dell Unity XT Replication Guide
* Dell Community on Data Protection
NEW QUESTION # 21
What is a consequence of using a 1.6 TB drive and five 400 GB drives in a Dell EMC Unity XT dynamic pool?
- A. Unisphere short strokes the 1.6 TB drive to 8 extents
- B. Extents 9 - 19 are marked unavailable until more 1.6 TB drives are added
- C. Extents 9 - 19 are marked unavailable and can never be recovered
- D. Extents 9 - 19 are used to create the RAID Group
Answer: B
Explanation:
Reference: https://www.delltechnologies.com/asset/en-us/products/storage/industry- market/h16289-dell_emc_unity-dynamic_pools.pdf
NEW QUESTION # 22
A customer has a PowerStore 3200T system with only base enclosure consisting of 15 SSD 1920 GB drives and wants to expand the available capacity. What is the most cost-effective drive addition from a raw and usable capacity perspective to achieve the result wanted by the customer?
- A. 6 x 3840 NVMe SSD drives
- B. 6 x 1920 NVMe SSD drives
- C. 6 x 750 GB NVMe SCM drives
Answer: A
Explanation:
Adding 6 x 3840 GB NVMe SSD drives is the most cost-effective way to expand the capacity of a PowerStore 3200T system. This addition provides a significant increase in both raw and usable capacity, offering a better balance of performance and cost compared to smaller or more expensive drive options.
Reference:
Dell EMC PowerStore Specification Sheet.
Dell EMC PowerStore Configuration Guide.
NEW QUESTION # 23
A customer has two Dell Unity arrays a Dell Unity 550F and a Dell Unity XT 480 They are undergoing a network refresh and would like to modernize to a 25 GbE network. The customer has asked the technical architect about adding 25 GbE network cards to the Unity systems Both systems have free slots Which option should the technical architect recommend?
- A. All Unity and Unity XT systems support 25 GbE.
- B. 25 GbE is not supported on Unity or Unity XT systems
- C. The Unity XT 480 supports a 25 GbE card but the Unity 550F does not support a 25 GbE card
- D. The Unity 550F supports a 25 GbE card but the Unity XT 480 does not support a 25 GbE card
Answer: C
Explanation:
The Unity XT 480 can be upgraded with the 25 GbE network cards, but the Unity 550F will not be able to support them and the customer will have to consider upgrading the Unity 550F to a newer model that supports 25 GbE.
NEW QUESTION # 24
Which drive type can be used in a FAST Cache pool configuration for Dell Unity XT solutions?
- A. SAS Flash 4
- B. SAS Flash 3
- C. SAS Flash 2
Answer: C
Explanation:
SAS Flash 2 drives can be used in a FAST Cache pool configuration for Dell Unity XT solutions. FAST Cache (Fully Automated Storage Tiering Cache) allows frequently accessed data to be moved to high-performance SSDs, improving overall system performance. SAS Flash 2 drives are suitable for this purpose, providing a balance of performance, endurance, and cost. Reference:Dell Unity XT FAST Cache Overview
NEW QUESTION # 25
Which Dell EMC Midrange solution is configured for block storage with a built-in hypervisor?
- A. SC 9000
- B. PowerStore T
- C. PowerStore X
- D. Unity XT
Answer: C
Explanation:
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
NEW QUESTION # 26
Which session of a PowerStore file import creates the destination NAS servers and file systems?
- A. Create
- B. Start
- C. Cutover
- D. Commit
Answer: B
NEW QUESTION # 27
A technical architect is designing a Dell Unity XT 480 using the System Designer option of Sizer. What is the recommended minimum amount of Flash that they should specify?
- A. 7%
- B. 10%
- C. 15%
- D. 5%
Answer: C
Explanation:
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
NEW QUESTION # 28
How many fans in a Dell EMC PowerStore node can fail before it shuts down?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
A node can tolerate a single fan module fault, and the surviving fans increase their speed to compensate for the faulted module. If two fan modules fault within the same node, the node performs a protective thermal shutdown. A protective thermal shutdown gracefully powers off the node, and any resource fails over to the surviving node Reference: https://www.delltechnologies.com/asset/en-us/products/storage/industry- market/h18149-dell-emc-powerstore-platform-introduction.pdf
NEW QUESTION # 29
What is the maximum throughput per port in backend 12 GB SAS ports in Dell Unity XT arrays?
- A. 2,000 Mbps
- B. 250 Mbps
- C. 25,000 Mbps
- D. 2,500 Mbps
Answer: D
Explanation:
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.
References:
* Dell Technologies Unity XT Technical Specifications
* Dell Entry-Level and Mid-Range Storage Community
NEW QUESTION # 30
While sizing a PowerStore solution with 5 TB usable capacity and 5000 IOPS for a Test/Development Application using NVMe drives, a solution architect observes that the recommended solution is 10 times the requested capacity. What action must the architect take?
- A. Configure the Unity solution as an alternative.
- B. Change the DRE Tolerance Parity in System Editor.
- C. Change the DRR of the solution.
Answer: C
Explanation:
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.
NEW QUESTION # 31
What is the maximum supported drive configuration in the base enclosure of the PowerStore 3200T?
- A. 21 x NVMe SCMs 4 x NVMe NVRAM
- B. 23 x NVMe SSDs 2 x NVMe NVRAM
- C. 23xNVMe SCMs 2 x NVMe NVRAM
- D. 21 x NVMe SSDs 2 x NVMe NVRAM
Answer: B
Explanation:
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.
NEW QUESTION # 32
A storage administrator plans to complete a technology refresh from a Dell EqualLogic PS6100 to a Dell EMC PowerStore array. The affected hosts are running native MPIO. What is the recommended method to support an import to PowerStore?
- A. Use Dell Storage Manager and select Online Import
- B. Install DSITV on the hosts
- C. Install EQL Hit Kit on the hosts
- D. Install PowerStore ImportKit on the hosts
Answer: D
Explanation:
An install of the PowerStore ImportKIT is required on the hosts to support import to PowerStore.
Reference: https://docplayer.net/188347142-Dell-emc-powerstore-importing-external-storage-to- powerstore-guide.html
NEW QUESTION # 33
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