D-MSS-DS-23問題集で2026年最新のEMC D-MSS-DS-23試験問題
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EMC D-MSS-DS-23 認定試験の出題範囲：
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質問 # 31
What are differences between the Dell Unity XT 380F array and the Dell Unity XT 880F array?
- A. Dell Unity XT 380F has embedded mezzanine ports. Dell Unity XT 880F has converged network adapter ports.
- B. Dell Unity XT 380F has converged network adapter ports. Dell Unity XT 880F has embedded mezzanine ports.
- C. Dell Unity XT 380F supports dynamic storage pools. Dell Unity XT 880F does not support dynamic storage pools.
- D. Dell Unity XT 380F does not support dynamic storage pools. Dell Unity XT 880F supports dynamic storage pools.
正解：B
解説：
The Dell Unity XT 380F array is equipped with converged network adapter (CNA) ports, while the Dell Unity XT 880F array features embedded mezzanine ports. These differences in port configurations reflect the varied performance and connectivity options available in different models of the Unity XT series.
質問 # 32
A customer has a data center with applications running on 16 volumes that are presented from a Dell Unity XT system. They want to design a DR site within metro distance with zero RPO using storage-based replication. According to Dell best practices, which design approach minimizes the impact on storage performance?
- A. Use Thick volumes within the replication group.
- B. Include a Flash tier in a hybrid pool where synchronous replication is active.
- C. Create the synchronous replication session before filling the source storage object with data.
- D. Use multiple ports per controller for replication.
正解：B
解説：
Dell Unity XT and DR Design:
For disaster recovery (DR) within a metro distance and zero Recovery Point Objective (RPO), synchronous replication is the preferred method.
Synchronous replication ensures that data is written to both the source and target volumes simultaneously, which requires high performance to minimize latency.
Best Practices for Minimizing Impact on Performance:
Multiple Ports per Controller: While this can improve throughput, it does not directly minimize the latency impact of synchronous replication.
Flash Tier in Hybrid Pool: Including a flash tier in a hybrid pool enhances performance significantly because flash drives offer lower latency and higher IOPS compared to traditional spinning disks. This is critical for synchronous replication scenarios where performance impact needs to be minimized.
Thick Volumes: Using thick volumes can provide consistent performance, but they do not inherently minimize the impact of synchronous replication.
Synchronous Replication Session: Creating the replication session before filling the source storage object with data is a procedural step and does not address performance during active replication.
質問 # 33
What is the minimum RPO that can be configured on a Dell Unity XT block-asynchronous replication session?
- A. 1 minute
- B. 20 minutes
- C. 60 minutes
- D. 5 minutes
正解：D
解説：
Recovery Point ObjectiveWhen you set up an asynchronous replication session, you can configureautomatic synchronization based on the RPO. You can specify an RPO from a minimum of 5 minutes up to a maximum of 1440 minutes (24 htours).
質問 # 34
Which model supports the AppsON feature?
- A. Unity VSA
- B. Unity XT
- C. PowerStore T
- D. PowerStore X
正解：D
質問 # 35
Which two workload parameters are required to proceed with sizing for a PowerStore solution?
(select 2)
- A. Data reduction ratio
- B. IOPS
- C. Response time
- D. Effective Capacity
正解：B、D
質問 # 36
A Microsoft SQL database has been installed on a Dell PowerStore array that has been in service for more than 365 days.
What data reduction methods are supported?
- A. Post process deduplication, zero detect, and compression
- B. Zero detect and post process-deep scan compression
- C. Deep scan data reduction and inline zero detection
- D. Inline zero detection, deduplication, and compression
正解：D
質問 # 37
Which NVMe SCM drives are supported by Dell PowerStore?
- A. 600 GB and 1.2 TB
- B. 800 GB and 1.6 TB
- C. 400 GB and 1 TB
- D. 375 GB and 750 GB
正解：C
質問 # 38
A customer wants to asynchronously replicate file data from a production Dell Unity 550F to a remote office in the same city with a UnityVSA When attempting to replicate one of the file systems the replication option is not available.
What should a technical architect advise the customer?
- A. Asynchronous replication is not supported to a UnityVSA
- B. Asynchronous replication requires a greater replication distance
- C. Only synchronous replication is supported on file systems
- D. The NAS server for the file system must be replicated
正解：D
質問 # 39
Which path of the sizer tool for Dell Unity XT uses predefined configurations that are based on array model, capacity points, random workloads, RAID type, and drive type?
- A. Simple Performance
- B. Advanced Performance
- C. System Designer
- D. Quick Configuration
正解：D
解説：
Sizer Tool Paths:
The Dell Unity XT sizer tool offers multiple paths for configuring storage solutions, each tailored to different user needs and expertise levels.
Quick Configuration:
The Quick Configuration path uses predefined configurations based on array model, capacity points, random workloads, RAID type, and drive type.
This path simplifies the sizing process by providing users with recommended configurations that align with common use cases and performance requirements.
質問 # 40
When designing a system to support Oracle OLAP Workload for a new customer with no I/O details, what are the default selections for the I/O profile input in sizer?
- A. Random Read: 70% at 8 KiB Random Write: 30% at 8 KiB
- B. Sequential Read: 70% at 8 KiB Sequential Write: 30% at 8 KiB
- C. Random Read: 50% at 32 KiB Random Write: 50% at 32 KiB
- D. Sequential Read: 80% at 8 KiB Sequential Write: 20% at 8 KiB
正解：A
解説：
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.
質問 # 41
What final operation should be performed after adding a single drive to a Dell Powerstore array?
- A. Add it to an existing DRS
- B. Back up the Keystore
- C. Verify drive operation
- D. Format the drive
正解：C
解説：
This ensures that the drive is properly connected and communicating with the array, and that it is functioning as expected. Additionally, the new drive should be added to an existing DRS (Drive Replacement Set) and if necessary, the keystore should be backed up and the drive should be formatted.
質問 # 42
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 0 DAE 2 to SAS Bus 1 DAE 3 to SAS Bus 0
- B. DAE 1 to SAS Bus 1 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
正解：A
解説：
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.
質問 # 43
Which front-end protocol card in Dell Unity XT 380 offloads processing to save CPU cycles for other operations?
- A. 4 port Fibre Channel module
- B. 4 port iSCSI module
- C. CNA for Fibre Channel
- D. CNA for iSCSI
正解：D
質問 # 44
What is a non-uniform distribution of I/O over storage capacity in Dell Unity XT Systems?
- A. Latency
- B. Response time
- C. Skew
- D. Throughput
正解：C
質問 # 45
Which two features are supported by the Cloud IQ mobile App? (Select 2)
- A. Allows users to set up access controls by assigning users to predefined roles.
- B. Allows users to email the recommended remediation to a colleague for help with performing the resolution.
- C. Overview of health, capacity, and performance details for the supported Dell storage platforms.
- D. Manage capacity, and performance details for the supported Dell storage platforms.
正解：B、C
解説：
CloudIQ Mobile App Features:
CloudIQ provides comprehensive monitoring and management for Dell storage platforms, accessible through both web and mobile apps.
Supported Features:
Overview of Health, Capacity, and Performance: The mobile app provides users with an overview of the health, capacity, and performance details for supported Dell storage platforms.
Email Recommended Remediation: The app allows users to email recommended remediation steps to colleagues, facilitating collaboration and resolution of identified issues.
質問 # 46
A technical architect is working with a customer to design a Dell Unity XT solution. The customer is concerned about enabling the data reduction storage service. What system condition should the architect recommend for enabling data reduction?
- A. Free capacity at or less than 50% free capacity
- B. Free capacity above 80%
- C. CPU utilization at or less than 50%
- D. CPU utilization above 80%
正解：C
解説：
* Data Reduction in Dell Unity XT:
* Data reduction technologies (deduplication and compression) are resource-intensive operations that require careful consideration of system conditions before enabling.
* Efficient data reduction improves storage utilization and performance but can significantly impact CPU resources.
* Enabling Data Reduction:
* The ideal condition for enabling data reduction on a Dell Unity XT system is when the CPU utilization is manageable.
* A CPU utilization at or less than 50% ensures that the system has enough headroom to handle the additional processing load without compromising overall performance.
* System Conditions:
* CPU utilization above 80%: Enabling data reduction under high CPU load can degrade performance and lead to system instability.
* Free capacity above 80%: High free capacity does not directly impact the ability to enable data reduction but does indicate ample storage space.
* Free capacity at or less than 50%: Lower free capacity might indicate higher utilization, which can stress the system when data reduction is enabled.
* CPU utilization at or less than 50%: This condition is optimal for ensuring that the system can efficiently manage data reduction processes without adverse effects.
* Dell Midrange Storage References:
* Dell Unity XT documentation provides clear guidelines on performance tuning and best practices for enabling data reduction.
* Additional resources from Dell's community forums and product support pages offer insights into real-world configurations and expert recommendations.
References:
* Dell Unity XT Performance Guide
* Dell Entry-Level and Mid-Range Community
* Dell Storage Produc
質問 # 47
A solution architect notices the PowerSizer is translating File Operations into IOPS for cluster and appliance summary......
What is the cause of this issue
- A. File Operations was not entered
MiB/s was not entered - B. File Operations was not entered
MiB/s was entered - C. File Operations was entered
MiB/s was entered - D. File Operations was entered
MiB/s was not entered
正解：D
質問 # 48
What are the inputs and outputs of the Unity Designer tool?
- A. Inputs: Sales order, Sizing XML file, System configuration PDF file Outputs: Detailed designExcel configuration guide report
- B. Inputs: Sales order, Detailed designExcel configuration guide report Outputs: Sizing XML file, System configuration PDF file
- C. Inputs: Sales order, Sizing XML file, System requirements Excel file Outputs: Detailed designExcel configuration guide report, System configuration PDF file
- D. Inputs: Sales order, Excel configuration guide report, Detailed design Outputs: Sales order, Sizing XML file, System configuration PDF file
正解：D
質問 # 49
Which file resources are supported with Dell EMC Unity asynchronous replication?
- A. LUNs and VMFS datastores
- B. NAS servers and NFS datastores
- C. Consistency Groups and file systems
- D. File systems and LUNs
正解：B
解説：
Reference: https://www.delltechnologies.com/en-us/documentation/unity-family/unity-p- replication-config/02-unity-rep-br-workflow.htm
質問 # 50
Which Dell PowerStore migration method is recommended to remediate an out of space condition?
- A. Assisted Migration
- B. Auto Placement
- C. Migrate
- D. Live Migrate
正解：A
解説：
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.
質問 # 51
How many PCI-E lanes are provided for Slot 0 and Slot 1 in Dell EMC Unity XT arrays?
- A. 16 for Slot 0; 16 for Slot 1
- B. 16 for Slot 0; 8 for Slot 1
- C. 8 for Slot 0; 8 for Slot 1
- D. 8 for Slot 0; 16 for Slot 1
正解：B
解説：
Reference: https://www.delltechnologies.com/en-gb/collaterals/unauth/technical-guides-support- information/products/storage/docu94617.pdf
質問 # 52
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