Master Dell EMC D-MSS-DS-23 Exam with Reliable Practice Questions

Correct : B

The recommended maximum cable length for PowerStore back-end NVMe cabling to avoid performance issues is 10 meters. This recommendation helps to ensure signal integrity and optimal performance across the NVMe interface, which is critical for maintaining the high throughput and low latency characteristics of NVMe storage.

Correct : A

Designing for Node Failure:

Ensuring a PowerStore solution performs optimally even in the event of a node failure requires careful consideration of performance thresholds.

Max Performance Saturation:

Setting the Max Performance Saturation to 50% during the sizing process ensures that in the event of a node failure, the remaining node can handle the load without performance degradation.

This conservative approach allows the system to operate within safe performance limits, maintaining high availability and performance.

Other Options:

Disaster Recovery Site: Important for overall business continuity but does not directly address performance during a node failure within the same site.

Performance Growth: Setting Performance Growth to 50% focuses on future growth rather than immediate redundancy considerations.

Higher Model: While providing a higher model can offer more resources, it is not as cost-effective as optimizing the performance saturation setting.

Dell Midrange Storage Reference:

Dell PowerStore documentation provides detailed guidelines on performance optimization and high availability configurations.

Community forums and support resources from Dell Technologies offer insights into best practices for sizing and redundancy.

Dell PowerStore Performance Guide

Correct : B

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 Reference:

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.

Dell Unity XT Sizer Tool Guide

Dell Community on Storage Performance

Correct : C

Asynchronous Replication in Dell Unity XT:

Asynchronous replication provides data protection over longer distances with flexible RPO settings.

Maximum RPO:

The maximum Recovery Point Objective (RPO) that can be configured for a block-asynchronous replication session in Dell Unity XT is 7 days.

This allows for up to a week's worth of data to be replicated asynchronously, balancing data protection and replication overhead.

Other Options:

24 hours, 48 hours, 14 days: These options do not align with the maximum configurable RPO of 7 days for asynchronous replication in Dell Unity XT.

Dell Midrange Storage Reference:

Dell Unity XT documentation provides detailed guidelines on configuring asynchronous replication and the available RPO settings.

Community forums and support resources from Dell Technologies offer insights into best practices for data protection.

Dell Unity XT Replication Guide

Dell Community on Data Protection

Correct : B

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 Reference:

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.

Dell Unity XT RAID Configuration Guide

Dell Community on Storage Configurations