Question 1

An engineer must permanently remove a node from a 10-node PowerFlex system The node is the primary MDM. What must they do before they remove the node to avoid errors and maintain availability'

Accepted Answer

C

Explanation: Before a node hosting the primary Meta Data Manager (MDM) can be removed, the primary role must be transferred to a standby MDM to ensure the cluster remains manageable and available. This process is called an MDM ownership switchover. PowerFlex Manager provides a guided, high-level workflow to "reconfigure MDM roles," which safely orchestrates this switchover. This action demotes the current primary to a standby, promotes another node to primary, and then allows for the safe removal of the original node without causing cluster errors or downtime.

Question 2

Which PowerFlex Manager activity can the System Admin role perform?

Accepted Answer

A

Explanation: The System Admin role in Dell PowerFlex Manager is specifically designed for managing the infrastructure and its lifecycle. This role has the necessary privileges to perform lifecycle management (LCM) operations, which include updating and patching the software and firmware of the managed PowerFlex system components. This aligns with the principle of separating infrastructure management duties from security and user administration tasks.

Question 3

A user leverages Postman lo send an API request What is the default format of the request1?

Accepted Answer

C

Explanation: When a user creates an API request in Postman and navigates to the 'Body' tab to add a payload, selecting the 'raw' option is a common practice. Postman provides a dropdown menu to specify the content type for this raw data. By default, this dropdown is set to JSON (JavaScript Object Notation). This default reflects JSON's prevalence as the de facto standard for data interchange in modern web APIs due to its lightweight syntax and ease of parsing by various programming languages.

Question 4

Which policy determines the priority of reconstructing data after a failure?

Accepted Answer

B

Explanation: Rebuild throttling is the specific policy that controls the I/O resources and priority assigned to the data reconstruction process (rebuild) following a component failure. Administrators can adjust this policy to either accelerate the rebuild process to restore full redundancy quickly, which may impact front-end application performance, or to slow it down, minimizing the impact on active workloads but extending the time the system is in a degraded state. This directly determines the priority of reconstructing data.

Question 5

Where must a customer go to generate a software troubleshooting bundle?

Accepted Answer

B

Explanation: PowerFlex Manager is the unified management and orchestration tool for the PowerFlex system. The Serviceability section within the PowerFlex Manager user interface is specifically designed for support and maintenance tasks. This includes the function to "Get Logs," which gathers diagnostic information from all managed components (MDM, SDS, SDC, gateways, etc.) and compiles it into a single downloadable troubleshooting bundle. This bundle is essential for Dell Support to analyze and resolve system issues. The other options represent different tools or sections with distinct purposes not related to system-wide software log collection.

Question 6

In a test-dev PowerFlex appliance environment, there are two Compute Only nodes five Storage Only
nodes, and one Management node An architect wants to create Fault Sets using all available servers
but is unable to do so What is the cause of this issue?

Accepted Answer

B

Explanation: Fault Sets in PowerFlex are a high-availability feature comprised exclusively of nodes running the Storage Data Server (SDS) component. In this two-layer PowerFlex appliance environment, only the five Storage Only nodes are eligible. While PowerFlex software can technically function with five SDS nodes, creating a robust and balanced Fault Set configuration on an appliance often implies stricter requirements than the software minimums. Best practice for N+2 data protection is to use a minimum of three Fault Sets. To ensure performance and successful data rebuilds after a Fault Set failure, a balanced layout with at least two nodes per set is recommended, leading to a practical minimum of six storage nodes. Since the environment has only five, it is considered insufficient for a resilient appliance configuration.

Question 7

An administrator is adding an NVMe device to an existing storage pool They provide the following
details in the Add Storage Device to SDS dialog box
• Device Path /dev/disk/by-id'Dell_Express_Flash_NVMe_PM1725_V6TB_SFF_
_S2JPNA0J500141
• Device Name NVMe A. 1.6 TB
• Storage Pool SP-1
What is the result of this action'?

Accepted Answer

A

Explanation: The provided device path, /dev/disk/by-id'DellExpressFlash..., is syntactically incorrect for a Linux-based operating system on which the Storage Data Server (SDS) runs. A valid path requires a forward slash (/) as a separator between directory components (e.g., /dev/disk/by-id/DellExpress...). The presence of a single quote (') instead of a forward slash after /by-id makes the path invalid. The PowerFlex software will be unable to resolve this path to locate the physical device, causing the add device operation to fail immediately upon path validation.

Question 8

A customer is adding more storage (o their system that requires compression Which two components are required? (Select 2)

Accepted Answer

A, B

Explanation: Dell PowerFlex compression is a feature that operates exclusively on Fine Granularity (FG) storage pools. This makes an FG storage pool a fundamental software-level requirement. At the hardware level, compression requires a high-performance, low-latency write-back cache on each Storage Data Server (SDS) to ingest and stage data before the compression algorithm is applied. This cache must be configured on persistent memory. NVDIMMs are a primary hardware choice for this cache due to their extremely low latency and built-in power-loss protection, which guarantees data integrity for writes held in the cache. A minimum of two NVDIMMs per server is required to provide redundancy for the cache.

Question 9

Which two aspects must be in place before adding a Fault Set? (Select 2)

Accepted Answer

A, B

Explanation: In a Dell PowerFlex system, a Fault Set is a logical grouping of Storage Data Servers (SDS) within a Protection Domain. The primary purpose of a Fault Set is to increase data availability by ensuring that mirrored copies of data are not placed on SDSs that share a common point of failure (e.g., the same server rack). For a Fault Set to be configured and functional, the foundational components that contain the SDSs and the storage they provide must already exist. These are the Protection Domain, which acts as the top-level container for the SDSs, and the Storage Pools, which are created from the storage devices managed by those SDSs.

Question 10

An administrator wants to create a NAS Server with Secure NFS which two configuration options are required? (Select 2)

Accepted Answer

B, E

Explanation: Secure NFS relies on the Kerberos authentication protocol, which is an integrated feature of the NFSv4 protocol suite. Therefore, enabling NFSv4 is a fundamental requirement. For the NAS server to enforce file-level permissions, it must map the authenticated Kerberos principal (the user) to a local UNIX identity (UID/GID). A UNIX Directory Service, such as LDAP or NIS, provides the necessary centralized and consistent user and group information for the NAS server to perform this mapping. Without this service, the server cannot resolve the user's identity to apply the correct access controls.

Free Dell D-PWF-DS-23 Actual Exam Questions