Updated PDF (New 2026) Actual EMC D-MSS-DS-23 Exam Questions
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NEW QUESTION # 43
The CPU utilization in a Dell Unity XT system is currently at 68% What is the level of CPU utilization?
- A. High Utilization
- B. Normal Utilization
- C. Low Utilization
- D. Extremely High Utilization
Answer: B
NEW QUESTION # 44
What initiates an automatic NAS server failover to the peer SP?
- A. SP hardware fault
- B. Assisted internal migration
- C. Network link failure
- D. Resource balancing algorithm
Answer: A
Explanation:
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.
NEW QUESTION # 45
Which statement is true about dynamic node affinity?
- A. Trespass affected block volumes between nodes.
- B. Automatically moves NAS servers to the peer node to balance the workload.
- C. Maintains relatively consistent utilization, latency, and performance between both nodes.
Answer: C
Explanation:
Dynamic node affinity in Dell Unity XT systems is designed to maintain relatively consistent utilization, latency, and performance between both nodes. This mechanism ensures that workloads are balanced across the storage processors, optimizing system performance and resource utilization. By dynamically adjusting the workload distribution, it helps in maintaining stable performance and reducing latency. Reference:Dell Unity XT System Architecture
NEW QUESTION # 46
A Windows client using the SMB protocol is trying to access a multiprotocol file system from a Dell Unity XT NAS server. The local group database was checked and no mapping was found.
What is the next step in the SID to UID resolution process?
- A. The Windows user is mapped to the default UNIX account
- B. The Windows user access is removed
- C. Secmap is checked
- D. The domain controller is checked
Answer: D
Explanation:
When a Windows client uses the SMB protocol to access a multiprotocol file system from a Dell Unity XT NAS server, the SID (Security Identifier) of the Windows user is mapped to a UID (User Identifier) on the UNIX file system. If no mapping is found in the local group database, the domain controller is checked to see if the SID is present there.
The domain controller can provide the information needed to map the SID to the corresponding UID on the file system, allowing the Windows user to access the files. If the SID is not present in the domain controller, the Windows user's access would be removed.
NEW QUESTION # 47
Which Dell EMC Unity feature provides network high availability with active-passive ports when provisioning File storage for a NAS client?
- A. Redundant Interfaces
- B. Preferred Interfaces
- C. Fail-safe Networking
- D. Link Aggregation
Answer: C
Explanation:
Document: docu71319_dell-emc-unity-high-availability-a-detailed-review.pdf Page: 20 FAIL SAFE NETWORKING (FSN) Dell EMC Unity OE version 4.2.1 introduces Fail Safe Networking (FSN).
FSN is a high availability feature that extends link failover into the network by providing switch- level redundancy. FSN appears as a single link with a single MAC address and potentially multiple IP addresses. FSN can consists of Ethernet ports, link aggregations, or any combination of the two. FSN adds an extra layer of availability to link aggregations alone as link aggregations provide availability in the event of a port failure while FSN provides availability in the event of a switch failure. Each port or Link aggregation is considered as a single connection and only the primary port or link aggregation in an FSN is active at a time. All ports in an FSN must have the same MTU size, but the speed and duplex settings can vary.
NEW QUESTION # 48
Which Dell PowerStore supported media devices carry a FIPS Type D certification?
- A. SAS SCM, NVMe SSD, and NVRAM
- B. SAS SSD, NVMe SSD, NVMe SCM, and NVRAM
- C. NVMe SCM, NVMe SSD, and SAS SSD
- D. SAS HDD, NVMe SSD, NVMe SCM, and SAS SSD
Answer: B
Explanation:
Dell PowerStore supports media devices that carry a FIPS Type D certification to ensure data security and compliance with Federal Information Processing Standards (FIPS). The certified media devices include:
* SAS SSD:Serial Attached SCSI (SAS) Solid State Drives are commonly used in enterprise storage solutions for their reliability and performance.
* NVMe SSD:Non-Volatile Memory Express (NVMe) Solid State Drives offer high-speed storage access and are optimized for performance.
* NVMe SCM:NVMe Storage Class Memory provides a new tier of storage that bridges the gap between DRAM and traditional SSDs, offering both speed and persistence.
* NVRAM:Non-Volatile Random Access Memory combines the speed of RAM with the persistence of flash storage, ensuring data is retained even after power loss.
These devices are FIPS Type D certified, ensuring they meet stringent security standards for data protection.
References:
* Dell Technologies PowerStore Documentation
* Dell Entry-Level and Mid-Range Storage Community
* Dell Storage Products Overview
NEW QUESTION # 49
What is the minimum number of IP addresses for optimal performance of PowerStoreX?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
The minimum number of IP addresses for optimal performance of PowerStoreX is 6. These IP addresses are required for management, replication, and data path operations, ensuring efficient and reliable system performance.
NEW QUESTION # 50
Which backend port are required to expand the PowerStore x200 models to have NVMe Expansions?
- A. 32 Gb FC I/O Module
- B. 25 GbE 4-Port Mezz Card
- C. 100 GbE 2-port Mezz card
Answer: C
Explanation:
InDell PowerStore X200models (part of Dell's midrange storage portfolio), NVMe expansions are supported by leveraging the NVMe-oF (NVMe over Fabrics) capabilities. Specifically, NVMe expansions require high- speed backend connectivity, and in these models, this is provided by a100 GbE 2-port Mezz card.
Here's the step-by-step explanation:
#NVMe Expansion Architecture:
PowerStore uses NVMe drives for extremely low latency and high throughput. To expand the system and connect additional NVMe expansion enclosures (like PowerStore's NVMe Expansion Enclosures), you need backend ports that support NVMe connectivity.
#Backend Port Choice:
The100 GbE 2-port Mezz cardis explicitly designed to support these NVMe backend connections. It provides the necessary bandwidth and low latency to support the NVMe expansion enclosures.
#Why not the other options?
The25 GbE 4-port Mezz cardis typically used for front-end host connectivity and does not support backend NVMe expansion.
The32 Gb FC I/O Moduleis for Fibre Channel SAN connectivity, not for NVMe backend expansions.
#Documentation Reference:
The officialDell PowerStore Technical SpecificationsandDell PowerStore Hardware Information Guidestate that the backend connectivity for NVMe expansions in PowerStore X200 systems relies on the100 GbE 2-port Mezzanine card.
Reference:
Dell PowerStore Technical Specifications (Dell Technologies)
Dell PowerStore Hardware Information Guide (Dell Technologies)
Dell PowerStore: NVMe Expansion Enclosure Overview
NEW QUESTION # 51
A Dell PowerStore protection policy contains two snapshot rules and one replication rule? Which storage resources will run only the snapshot rules?
- A. Virtual Machines and File Systems
- B. Volume Groups and File Systems
- C. Volumes and Volume Groups
- D. Virtual Machines and File Servers
Answer: A
NEW QUESTION # 52
A systems administrator has deployed a Dell Unity XT 380F system with 15x 1.92 TB SSD drives, in a RAID 5 dynamic pool Shortly after deployment, the administrator wants to expand the capacity of the system and use larger drives to increase the density What will happen if the administrator adds 4x 3 84 TB SSD drives?
- A. The mixing of drive types is not supported and the operation will fail
- B. Only half of the capacity of the new drives will be available
- C. The full capacity of the drives will be available
- D. Three of the drives will be added with a fourth reserved as spare
Answer: A
Explanation:
Dell Unity XT systems does not support mixing different drive types in the same RAID group.
Adding larger drives to an existing RAID group with smaller drives will cause the operation to fail.
The administrator should create a new RAID group with the larger drives and then copy the data from the old RAID group to the new one.
NEW QUESTION # 53
A systems administrator has deployed a DellUnity XT 380F with 90x 1.92 TB SSDs in a dynamic pool How many drives are allocated as spare space?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
The Dell Unity XT 380F has a default spare space allocation of 4% of the total number of drives in a dynamic pool. So with 90x 1.92 TB SSDs, 4 drives will be allocated as spare space. These spare drives are used to automatically replace a failed drive, ensuring data availability and protection.
NEW QUESTION # 54
A database volume on a Dell PowerStore cluster has a Protection Policy that is applied with a single snapshot rule. The policy takes a snapshot every hour and retains them for 48 hours. The storage administrator must present a copy of the database volume to a test environment Which action does the storage administrator take to meet this requirement?
- A. Create a thin clone of the database volume and map it to the test host
- B. Create a snapshot of the database volume and map it to the test host
- C. Restore the snapshot to a new test volume
- D. Create a new snapshot policy for the test volume
Answer: A
Explanation:
A thin clone is a writeable copy of a volume, which shares the same data blocks as the parent volume. This allows the administrator to provide a copy of the production database volume to the test environment without affecting the production data. It also allows to test the data without affecting the production data, and also it doesn't require additional storage space.
NEW QUESTION # 55
Which describes cascade replication on a Dell Unity XT?
- A. Synchronous replication of a file 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. Asynchronous replication of a block 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 # 56
Which two attributes characterize I/O workloads for sizing the PowerStore storage solution?
(Select
2)
- A. Read vs. Write ratios
- B. Extent of Serialization
- C. Splitting of Workloads
- D. CloudIQ Reporting
- E. Random vs. Sequential I/O
Answer: A
Explanation:
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.
NEW QUESTION # 57
What is the recommended order for connecting DAEs to SAS ports when only two ports are available on each SP of a Dell Unity XT DPE?
- A. DAE 1 to SAS Bus 1 DAE 2 to SAS Bus 1 DAE 3 to SAS Bus 0
- B. DAE 1 to SAS Bus 0 DAE 2 to SAS Bus 1 DAE 3 to SAS Bus 0
- C. DAE 1 to SAS Bus 1 DAE 2 to SAS Bus 0 DAE 3 to SAS Bus 1
- D. DAE 1 to SAS Bus 0 DAE 2 to SAS Bus 0 DAE 3 to SAS Bus 1
Answer: B
Explanation:
When connecting Disk Array Enclosures (DAEs) to SAS ports on a Dell Unity XT DPE (Disk Processor Enclosure) with only two ports available on each SP (Storage Processor), the recommended order is DAE 1 to SAS Bus 0, DAE 2 to SAS Bus 1, and DAE 3 to SAS Bus 0. This configuration helps in balancing the load across the available SAS ports, ensuring optimal data flow and performance. Reference:Dell Unity XT Configuration Guide
NEW QUESTION # 58
Which are benefits of choosing the highest capacity flash drives when designing a Dell Unity XT All-Flash system?
- A. Lowers physical space power and cooling requirements
- B. Enhances data security and system boot time
- C. Decreases ware-leveling, performance and redundancy requirements
- D. Reduces maintenance and rebuild time
Answer: A
Explanation:
Choosing the highest capacity flash drives when designing a Dell Unity XT All-Flash system can provide several benefits, including lower physical space, power and cooling requirements.
Additionally, higher capacity drives can also improve system boot time, reduce maintenance and rebuild time, and decrease wear-leveling, performance, and redundancy requirements.
NEW QUESTION # 59
The CPU utilization in a Dell Unity XT system is currently at 68%. What is the level of CPU utilization?
- A. Normal Utilization
- B. High Utilization
- C. Low Utilization
- D. Extremely High Utilization
Answer: B
Explanation:
* Understanding CPU Utilization Levels:
* Dell Unity XT systems categorize CPU utilization to help administrators assess the performance and health of their storage systems.
* Utilization levels typically include categories like low, normal, high, and extremely high to simplify performance monitoring.
* CPU Utilization in Dell Unity XT:
* According to Dell Unity XT documentation, CPU utilization percentages are used to determine the performance state of the system.
* A CPU utilization of 68% is considered high but not critical. This is because the system is handling a significant load but still within operational parameters.
* Operational Thresholds:
* Low Utilization: Below 30%
* Normal Utilization: 30% - 60%
* High Utilization: 60% - 80%
* Extremely High Utilization: Above 80%
* Given these thresholds, 68% falls into the "High Utilization" category.
* Dell Midrange Storage References:
* Dell Technologies Partner Program documentation on midrange storage provides detailed metrics and thresholds for system performance. This information is crucial for administrators to make informed decisions about system capacity and performance tuning.
* Additional resources on Dell's community forums and official product pages for entry-level and midrange storage also support these utilization thresholds.
By categorizing CPU utilization as "High" at 68%, administrators can take necessary actions to optimize system performance or plan for additional capacity if needed.
References:
* Dell Unity XT Overview
* Dell Entry-Level and Mid-Range Community
* Dell Storage Products
NEW QUESTION # 60
Which network option should be configured to provide the best iSCSI performance on a Dell Unity XT array?
- A. Single VLAN for all traffic
- B. Disable flow control
- C. iSCSI offload
- D. Jumbo frames
Answer: D
Explanation:
For optimal iSCSI performance on a Dell Unity XT array, configuring jumbo frames is recommended. Jumbo frames allow for larger packets of data to be sent over the network, reducing the CPU load on both the storage array and the host, and improving overall throughput. Configuring jumbo frames typically involves setting the MTU (Maximum Transmission Unit) to 9000 bytes on all network devices along the path.
NEW QUESTION # 61
A user is storing data on the quota tree on a Dell PowerStore system. What can an administrator use to limit the amount of storage that the user consumes?
- A. A NAS server quota
- B. A bandwidth throttle quota
- C. User quota on the tree quota
- D. A second tree quota
Answer: C
Explanation:
An administrator can use a user quota to limit the amount of storage that the user consumes on a Dell PowerStore system. A user quota is a limit that is set on the quota tree, which is a hierarchical structure that organizes storage resources and sets limits on how much storage can be used at each level. The user quota is applied to a specific user or group of users and limits the amount of storage that can be consumed by that user or group of users.
NEW QUESTION # 62
A customer has two Dell S4148FON switches which are not connected to each other. The customer wants to use SMB to present NAS data directly from the array to their users. The solution must have resilience in case a switch outage occurs Which solution should the technical architect recommend?
- A. Dell PowerStore 1000T
- B. Dell Unity XT 480
- C. Dell PowerStore100X
- D. Dell PowerVault ME4
Answer: B
NEW QUESTION # 63
What is the purpose of the NVMe NVRAM drives in a Dell EMC PowerStore 1000 array?
- A. Read cache and base OS
- B. Write cache and vaulting
- C. Write cache and base OS
- D. Read cache and vaulting
Answer: B
Explanation:
The base enclosure is an all-NVMe platform, capable of supporting NVMe SSD, NVMe SCM, and NVMe NVRAM drives. You can populate slots 0 through 20 with NVMe SSD or NVMe SCM drives. Slots 21 through 24 are reserved for NVMe NVRAM drives which serve as additional system write caching. PowerStore 1000 and PowerStore 3000 models contain two NVMe NVRAM drives in slots 23 and 24. Reference: https://www.delltechnologies.com/asset/en- us/products/storage/industry-market/h18149-dell-emc-powerstore-platform-introduction.pdf
NEW QUESTION # 64
In a Dell Unity XT system, SSD wear alerts are issued at 180-, 90-, 60-, and 30-day periods before the predicted end of life. What is automatically initiated on the spare drive at 30 days?
- A. Protective Copy Operations
- B. Proactive Copy Operations
- C. Preemptive Copy Operations
- D. Predictive Copy Operations
Answer: B
Explanation:
* SSD Wear Alerts in Unity XT:
* Dell Unity XT systems monitor SSD wear and issue alerts at various intervals (180, 90, 60, and 30 days) before the predicted end of life.
* Action at 30 Days:
* At the 30-day alert, the system automatically initiates Proactive Copy Operations to copy data from the wearing SSD to a spare drive, ensuring data integrity and continuity.
* Proactive Copy Operations:
* This proactive measure helps prevent data loss and maintains system performance by preparing for SSD replacement in advance.
* Dell Midrange Storage References:
* Dell Unity XT documentation provides detailed guidelines on SSD wear monitoring and the associated proactive measures.
* Community forums and support resources from Dell Technologies offer additional insights into system maintenance and proactive data protection.
References:
* Dell Unity XT SSD Wear Guide
* Dell Community on Storage Maintenance
NEW QUESTION # 65
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