Exam: D-PWF-DS-23
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Certification Overview
Successfully obtaining this certification enables and validates the
candidate’s ability to apply the knowledge and skills required to effectively
design a PowerFlex solution in order to identify and document specific
requirements in preparation for installation and implementation of the solution.
The certification supports the skills needed to successfully work within
environments undergoing digital and IT Transformations
Certification Requirements
To successfully complete this certification, a candidate must:
1. Have a sufficient knowledgebase/skill set through hands-on product experience
and/or by consuming the Recommended Training.
2. Pass the Dell PowerFlex Design 2023 Exam.
Note: These details reflect certification requirements as of August 25, 2023.
The Proven Professional Program periodically updates Certifications to
reflect technical currency and relevance. Please check the Proven Professional
website regularly for the latest information.
Exam Overview
This exam focuses on designing overall PowerFlex (appliance/node or rack)
solutions. This includes solution architecture, use cases, hardware, and
software components. It also includes working with specific PowerFlex processes,
tools, solution resources, system security, data protection, component backups,
and basic troubleshooting.
Products
Products likely to be referred to on this exam include but are not limited to:
• PowerFlex 4.0 Appliance
• PowerFlex 4.0 Rack
• PowerFlex 4.0 Custom Node
Exam Topics
Topics likely to be covered on this exam include:
PowerFlex Foundations (15%)
• Describe PowerFlex products and deployment models
• Describe PowerFlex architecture and software interfaces
PowerFlex Solution Design (13%)
• Align a PowerFlex solution to requirements
• Capture a design and validate it with a customer
PowerFlex Objects Configuration (20%)
• Configure Protection Domains and Fault Sets
• Configure Storage Pools
• Configure Storage Data Servers
• Configure Meta Data Managers
PowerFlex Nodes and Volumes Configuration (38%)
• Configure PowerFlex Nodes
• Working with Volumes (e.g., create, replicate, and protect)
• Create, configure, and protect NAS Filesystems
PowerFlex Solutions Integration and Troubleshooting (15%)
• Integrate for security
• Backup and restore a cluster
• Troubleshoot a cluster
The percentages after each topic above reflects the approximate distribution of
the total question set across the exam.
Exam Preparation
Dell Technologies provides free practice tests to assess your knowledge in
preparation for the exam. Practice tests allow you to become familiar with the
topics and question types you will find on the proctored exam. Your results on a
practice test offer one indication of how prepared you are for the proctored
exam and can highlight topics on which you need to study and train further. A
passing score on the practice test does not guarantee a passing score on the
certification exam.
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QUESTION 1
A customer application generates 2 GB/s writes The outage is under two
hours. What capacity must be allowed for the journal?
A. 14.400 GB
B. 10.800 GB
C. 7,200 GB
D. 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 applications 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 2
What is the maximum number of SDSs per protection domain of the PowerFlex
rack?
A. 256
B. 128
C. 64
Answer: B
Explanation:
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.
QUESTION 3
An administrator is creating a NAS server with a Standalone Windows server.
Creation of trie NAS server fails What is the cause of the failure?
A. A Storage Pool lor NAS has not been created
B. The NAS server is using the same VLAN as block storage networks
C. DNS was not defined in the NAS server creation wizard
D. FSN has not been added to the cluster
Answer: A
Explanation:
The creation of a NAS server requires a dedicated storage pool. If a storage
pool specifically for NAS
has not been created, the NAS server creation will fail. This is because the NAS
server needs to
allocate space from a storage pool to store the file system data. Without a
designated storage pool,
the NAS server cannot be configured properly1.
The other options, while important for the operation and integration of a NAS
server, are not directly
related to the creation process itself. For instance, using the same VLAN as
block storage networks
(Option B) may lead to network conflicts, but it would not prevent the creation
of the NAS server.
Similarly, not defining DNS in the NAS server creation wizard (Option C) could
cause resolution issues
later on, but it is not a prerequisite for the creation of the NAS server.
Lastly, while adding FSN to the
cluster (Option D) is a necessary step for enabling file system services, it is
not the cause of the NAS
server creation failure in this context.
Therefore, the correct answer is
A. A Storage Pool for NAS has not been created, as it is a
fundamental requirement for the NAS server creation process in a PowerFlex
environment.
QUESTION 4
What is the default value of paths per volume when adding an NVMe host?
A. 8
B. 4
C. 2
D. 1
Answer: A
Explanation:
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 Dells official documentation and design guidelines
for PowerFlex systems.
QUESTION 5
Where must a customer go to generate a software troubleshooting bundle?
A. PowerFlex Manager Events and Alerts
B. PowerFlex Manager Serviceability
C. iDRAC Lrfecycle Controller
D. CloudLmk Center Console
Answer: B
Explanation:
To generate a software troubleshooting bundle for PowerFlex, a customer must
navigate to the
PowerFlex Manager Serviceability. The steps to generate the bundle are as
follows1:
Log in to PowerFlex Manager.
Choose ˜Settings from the menu.
Within the Settings menu, select ˜Virtual Appliance Management.
Choose ˜Generate Troubleshooting Bundle.
In the popup window, the customer has the option to either send the bundle to
Configured Secure
Remote Services (Secure Remote Services) or download it locally. If downloading
locally, select the
path for the downloads and enter the appropriate login information, then click
˜Generate.
This process is part of the serviceability features of PowerFlex Manager, which
provides tools for
system maintenance and troubleshooting. It is important to follow these steps
carefully to ensure
that the troubleshooting bundle is generated correctly and contains all the
necessary information for
diagnosing issues within the PowerFlex system.
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