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Dell PowerFlex Design
2023 Exam
Version: Demo
[ Total Questions: 10]
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D-PWF-DS-23
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Question #:1
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'?
The device addition fails due to an invalid path
The device is named "NVMeAt 6 TB" and added to the Storage Pool "SP-1".
The device name is truncated to "NVMe" and added lo the Storage Pool "SP-t"
The device addition tails due to invalid characters in the name
Answer: A
Explanation
When adding an NVMe device to an existing storage pool in PowerFlex, the details provided in the “Add
Storage Device to SDS” dialog box must be accurate and follow the correct syntax. In the scenario provided,
the device path contains an invalid character (an apostrophe) and an incorrect format, which would cause the
device addition to fail.
Here’s a breakdown of the process and where the error occurs:
Device Path: The device path should be a valid Linux device path, typically starting
with /dev/disk/by-id/. The path provided contains an apostrophe (') which is not a valid character in
Linux file paths and would result in an error1.
Device Name: The device name should be a simple identifier without spaces or special characters. The
name provided, “NVMe A. 1.6 TB”, contains spaces and periods, which are not typical for device names
and could potentially lead to issues, although the primary cause of failure is the invalid device path1.
Storage Pool: The storage pool name “SP-1” is a valid identifier, but it is contingent on the correct
device path and name for the device to be added successfully.
The result of the action, given the invalid device path, would be that the device addition fails. It is crucial to
ensure that all details entered in the dialog box adhere to the expected formats and do not contain invalid
characters to avoid such failures.
This explanation is based on the standard practices for device path naming conventions in Linux systems and
the configuration guidelines for PowerFlex systems as described in Dell’s official documentation1. Correcting
the device path by removing the invalid character and ensuring the proper format would resolve the issue and
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allow the device to be added to the storage pool successfully.
Question #:2
A user leverages Postman lo send an API request What is the default format of the request1?
XML
JAVA
JSON
CSV
Answer: C
Explanation
When using Postman to send an API request, the default format for the request body is JSON (JavaScript
Object Notation). JSON is a lightweight data-interchange format that is easy for humans to read and write and
easy for machines to parse and generate. It is commonly used in API communication because it is
language-independent and can be used with most modern programming languages12.
Here’s why JSON is the default format:
Human-readable: JSON structures are clear and understandable, making it easy for developers to work
with.
Widely supported: JSON is supported by a vast number of APIs and is often the preferred format for
RESTful web services.
Efficient: JSON’s lightweight nature makes it efficient for network transmission.
While Postman can handle other formats like XML (Option A) and CSV (Option D), and you can write scripts
in languages like Java (Option B), JSON remains the default choice for structuring the body of an API
request12.
Question #:3
Place the steps to set up remote replication on the Powerflex system in the correct order
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Answer:
Explanation
The correct sequence of steps to set up remote replication on the PowerFlex system is as follows:
Install target PowerFlex system: Before replication can be set up, there must be a target system in place
to receive the replicated data1.
Exchange root certificates: This is a security measure to ensure that communication between the source
and target systems is secure1.
Add a Replication Peer: This involves configuring the target system as a replication partner in the source
system’s configuration1.
Configure replication volumes: Finally, specific volumes on the source system are configured to
replicate to the target system1.
Setting up remote replication in a PowerFlex system involves a series of steps that establish the necessary
components and configurations for the replication process. The sequence begins with the installation of the
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target PowerFlex system, which will serve as the destination for the replicated data. Next, root certificates are
exchanged between the source and target systems to ensure secure communication. The target system is then
added as a Replication Peer within the source system’s configuration. Lastly, the volumes intended for
replication are configured on the source system to complete the setup process. This sequence ensures that the
replication is secure, reliable, and correctly configured to maintain data integrity and availability across both
systems1.
Question #:4
A customer is setting up PowerFlex Manager and wants to start with the minimal supported configuration
Which configuration should be selected''
36vCPU and 600 GB Disk Space
42vCPU and 400 GB DisK Space
42vCPU and 600 GB DisK Space
36vCPU and 400 GB DisK Space
Answer: A
Explanation
For setting up PowerFlex Manager with the minimal supported configuration, the customer should select the
option with 36vCPU and 600 GB DISK Space. This configuration provides a sufficient amount of resources to
support the management operations of PowerFlex Manager while adhering to the minimal requirements.
The selection process for the minimal supported configuration typically involves:
Evaluating Requirements: Understanding the minimal resource requirements for PowerFlex Manager,
which includes CPU and disk space.
Matching Specifications: Aligning the available options with the known minimal requirements.
Selecting the Configuration: Choosing the configuration that meets or exceeds the minimal requirements
without unnecessary resource allocation.
The reference for this information can be found in the PowerFlex Manager documentation, which outlines the
system requirements for different deployment scenarios1. It is important to consult the latest compatibility
matrix and administration guides to ensure that the chosen configuration aligns with the current supported
standards and recommendations for PowerFlex Manager deployments1.
Question #:5
Which component of the PowerFlex cluster provides server metrics such as telemetry thermal data and sets the
server configuration profile?
PowerFlex Manager
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B. 
C. 
D. 
A.B. 
C. 
D. 
CloudLink Center
VMware ESXi
iDRAC
Answer: D
Explanation
The Integrated Dell Remote Access Controller (iDRAC) is the component within a PowerFlex cluster that
provides server metrics, including telemetry and thermal data, and allows for setting the server configuration
profile. iDRAC is an embedded system management hardware and software solution that provides remote
management capabilities, system health monitoring, and recovery capabilities. It is a key component for server
lifecycle management within the PowerFlex infrastructure1.
iDRAC operates independently from the server’s CPU and operating system, enabling administrators to
monitor server health and manage systems even when the server is turned off or unresponsive. It provides a
comprehensive set of server management features, including:
Monitoring server health and managing power usage.
Accessing logs for troubleshooting and recovery.
Updating firmware and drivers.
Configuring hardware settings and server profiles.
These capabilities are essential for maintaining the reliability and performance of PowerFlex clusters, making
iDRAC a critical component for server metrics and configuration management.
Question #:6
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'
Use the renove_standby_imdm SCLI command
Use the switch_ciuster_mcde SCLI command
Use PowerFlex Manager to reconfigure MDM roles
Use PowerFlex Manager to deactivate the Protection Domain.
Answer: C
Explanation
Before permanently removing a node that is the primary MDM from a PowerFlex system, it is crucial to
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ensure that the MDM roles are reconfigured to maintain cluster availability and avoid errors. This process
involves promoting another node to take over the primary MDM role and ensuring that the cluster continues to
function correctly without the node that is being removed.
The steps to reconfigure MDM roles using PowerFlex Manager are as follows:
Log in to PowerFlex Manager.
Navigate to the MDM cluster settings.
Identify a suitable node that can be promoted to the primary MDM role.
Use the PowerFlex Manager interface to promote the selected node to the primary MDM role.
Ensure that the cluster is stable and that the new primary MDM is functioning correctly.
Once the new primary MDM is in place and operational, the original primary MDM node can be safely
removed from the cluster.
This process is essential to prevent any disruptions in the management and operation of the PowerFlex system.
The other options listed, such as using the remove_standby_mdm SCLI command (Option A) or the
switch_cluster_mode SCLI command (Option B), do not directly address the reconfiguration of MDM roles.
Deactivating the Protection Domain (Option D) is not related to the removal of an MDM node and would not
be a recommended step in this scenario.
Therefore, the correct answer is C. Use PowerFlex Manager to reconfigure MDM roles, as it ensures that the
MDM responsibilities are transferred to another node before the primary MDM node is removed, thus
maintaining the integrity and availability of the PowerFlex system1.
Question #:7
What maximum raw capacity can a user expect in a 1U Node while configuring a PowerFlex with an MG
pool?
38 4 TB
307.2 TB
76.8 TB
153.6 TB
Answer: A
Explanation
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.
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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.
Question #:8
A customer application generates 2 GB/s writes The outage is under two hours. What capacity must be
allowed for the journal?
14.400 GB
10.800 GB
7,200 GB
240 GB
Answer: B
Explanation
To calculate the required journal capacity, we need to consider the maximum cumulative writes that might
occur during an outage. The calculation is based on the application’s write bandwidth and the duration of the
supported outage. For an application generating 2 GB/s of writes, using a 2-hour outage (which is 7200
seconds), the journal capacity reservation needed is:
Journal Capacity=Write Bandwidth×Outage Duration
Journal Capacity=2 GB/s×7200 s=14400 GB
However, since the question specifies that the outage is under two hours, we use the minimum outage
allowance of 1 hour for the calculation, which is 3600 seconds. Therefore, the correct calculation is:
Journal Capacity=2 GB/s×3600 s=7200 GB
But considering the recommendation to use three hours in the calculations for safety, the needed capacity
would be approximately 10.547 TB, which is roughly 10.800 GB12. Hence, the verified answer is 10.800 GB.
Question #:9
An administrator wants to track total usage on a PowerFlex File system but does not want to impose any
restrictions on their users How can this be accomplished using quotas'?
Create a usei quota and set an indefinite grace period
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B. 
C. 
D. 
A. 
B. 
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Create a user quota and set both the soft and hard limits to zero
Create a tree quota and set an indefinite grace period
Create a tree quota and set both the soft and hard limits lo zero
Answer: D
Explanation
To track total usage on a PowerFlex File system without imposing any restrictions on users, an administrator
can create a tree quota and set both the soft and hard limits to zero. This method allows the administrator to
monitor usage without enforcing any quota limits, thus not restricting user behavior.
Here’s how it can be accomplished:
Access the PowerFlex Management Console: Log in to the PowerFlex Management Console where you
can manage quotas.
Navigate to the File System: Locate the file system for which you want to track usage.
Create a Tree Quota: Choose to create a new tree quota for the file system.
Set Limits to Zero: When setting up the quota, input zero for both the soft and hard limits. This
effectively means there are no limits enforced on the users.
Apply the Quota: Save and apply the quota settings to the file system.
By setting both limits to zero, the administrator can use the quota system purely for monitoring purposes,
without affecting user operations. The users will not encounter any quota warnings or limits, but the system
will still track and report on the total usage, which the administrator can review.
The rationale behind using a tree quota rather than a user quota is that tree quotas are associated with a
directory tree, allowing the tracking of usage across a broader scope, which is more suitable for monitoring
overall file system usage.
This approach is consistent with best practices for administering PowerFlex systems as described in the Dell
PowerFlex Administration Guide1, which provides detailed procedures for managing storage, including the
configuration of quotas for monitoring purposes.
Question #:10
A customer in a large enterprise environment is planning to deploy hundreds of internally supported
third-party nodes over the next six months What PowerFlex platform mustbe used for this deployment?
Rack
Software only
Appliance
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D. Custom node
Answer: B
Explanation
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.
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