Dell EMC Dell PowerFlex Design 2023 D-PWF-DS-23 Exam Practice Test

Answer : A

The default value of paths per volume when adding an NVMe host to a PowerFlex system is 8. This setting is relevant for the configuration of multipathing, which is a method used to provide redundancy and increase availability for storage environments. When you add an NVMe host, the system allows up to 8 paths per volume to be configured by default. This is particularly important in VMware ESXi environments, where multipathing can be configured to handle failover and load balancing of storage traffic.

The reference for this information is found in the Dell PowerFlex specification sheet, which outlines the maximum paths in the multipathing driver per volume as 8 for ESXi 7.0u31. This document provides detailed specifications and configurations for the PowerFlex system, ensuring that the information is aligned with Dell's official documentation and design guidelines for PowerFlex systems.

Answer : B

The maximum number of Storage Data Servers (SDSs) per protection domain in a PowerFlex rack is 1283. This is specified in the PowerFlex specification sheet and ensures that each protection domain can provide data protection for a significant number of SDSs, allowing for scalability and resilience within the PowerFlex infrastructure.

Answer : A

The maximum raw capacity that can be expected in a 1U Node while configuring a PowerFlex system with an MG (Multi-Granularity) pool is 38.4 TB. This is based on the typical maximum raw storage capacity available for a 1U node configuration, which is designed to fit within the physical constraints of a 1U rack space while providing a balance of capacity and performance1.

The MG pool in PowerFlex is designed to optimize storage efficiency and performance, and the capacity of a 1U node would be aligned with the specifications that ensure the system's reliability and scalability. The other options listed provide capacities that are generally too high for a single 1U node within the PowerFlex architecture1.

Therefore, the correct answer is A. 38.4 TB, as it represents the realistic maximum raw capacity for a 1U Node in a PowerFlex system with an MG pool.

Answer : B

For a large enterprise environment planning to deploy hundreds of internally supported third-party nodes, the most suitable PowerFlex platform is the ''Software only'' option. This deployment model provides the flexibility needed for such a large-scale and customized deployment.

Here's the rationale behind this choice:

Scalability: The software-only option allows for the greatest level of scalability, which is necessary when deploying a large number of nodes over time1.

Flexibility: It offers the flexibility to use third-party hardware, which is likely a requirement in this scenario where the enterprise is using internally supported nodes1.

Customization: This option provides the ability to customize the deployment to meet specific enterprise requirements, which is essential when integrating a large number of diverse nodes1.

Integration: The software-only model facilitates easier integration with existing systems and processes within the enterprise, allowing for a more seamless deployment1.

The software-only deployment model is designed for environments that require a high degree of customization and control over the hardware and infrastructure, making it the ideal choice for this customer's needs as per the information provided in the Dell PowerFlex specification sheet1.

Answer : B

FNA, or Full Network Automation, in the context of PowerFlex Manager, enables customers to leverage their existing network investments and processes. This feature is designed to simplify the deployment and management of PowerFlex systems by automating the configuration of network-related settings and integrating with existing network infrastructures.

Here's how FNA contributes to leveraging existing network investments and processes:

Network Integration: FNA allows PowerFlex Manager to integrate seamlessly with the customer's existing network setup, making use of current investments in network hardware and configurations1.

Automation: It automates the network configuration process for PowerFlex nodes, reducing the need for manual intervention and minimizing the potential for human error2.

Optimization: By automating network configurations, FNA helps optimize network performance and ensures that the PowerFlex system is utilizing the network resources efficiently1.

Simplification: FNA simplifies the management of network settings, making it easier for customers to maintain and scale their PowerFlex environments without having to overhaul their existing network processes1.

The ability to leverage existing network investments and processes is a key advantage of using FNA with PowerFlex Manager, as it allows customers to maintain their current network strategies while benefiting from the automation and optimization that PowerFlex Manager provides1.

Answer : C

The PowerFlex rack is the offering that is a fully engineered system, which includes licensing and a unified management platform. The PowerFlex rack is designed to provide a comprehensive solution that combines compute and high-performance software-defined storage resources in a managed, unified fabric for both block and file1. It is an ideal choice for businesses looking for a complete, out-of-the-box solution that simplifies deployment and management of their IT infrastructure.

The PowerFlex appliance (Option B) and PowerFlex custom node (Option A) are also part of the PowerFlex family, but they offer different levels of integration and flexibility. The PowerFlex software-only option (Option D) provides the software components without the fully engineered system and unified management platform that come with the PowerFlex rack1.

Therefore, the correct answer is C. PowerFlex rack, as it is the offering that includes a fully engineered system with licensing and a unified management platform, providing a comprehensive and integrated solution for modern IT environments.

Answer : B

In a PowerFlex appliance environment, Fault Sets are used to group Storage Data Servers (SDSs) that are managed together as a single fault unit. When Fault Sets are employed, the distributed mesh-mirror copies of data are never placed within the same fault set1. This means that each Fault Set must have enough SDSs to ensure that data can be mirrored across different Fault Sets for redundancy.

Given that there are only five Storage Only nodes available in the described environment, and considering that each node runs an SDS, it may not be possible to create Fault Sets using all available servers if the number of Fault Sets or the distribution of SDSs across those Fault Sets does not allow for proper mirroring of data. The architecture requires a certain number of SDSs to be available to form a Fault Set that can be used for data mirroring and redundancy1.

The other options, such as requiring more than one Management node (Option A) or not having enough Compute Only nodes (Option C), are not directly related to the creation of Fault Sets. The Management node's primary role is to manage the cluster, not to participate in Fault Sets, and Compute Only nodes do not contribute storage resources to Fault Sets.

Therefore, the correct answer is B. There are not enough Storage Only nodes, as this would prevent the architect from creating Fault Sets that meet the redundancy requirements of the PowerFlex appliance environment.