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EMC D-PSC-MN-01 Exam Syllabus Topics:

Topic	Details
Topic 1	PowerScale Hardware Maintenance: Targeted at system administrators, this section focuses on key tasks involved in maintaining PowerScale hardware. It examines candidates' proficiency in completing initial maintenance steps, preparing nodes for operation, and processing Field Replaceable Unit (FRU) and Customer Replaceable Unit (CRU) requests.
Topic 2	PowerScale Implementation: Geared towards cluster administrators, this section covers the practical aspects of implementing PowerScale systems. It focuses on creating new clusters, integrating nodes into existing clusters, and applying alternative configurations or accessories to improve performance.
Topic 3	PowerScale Hardware Installation: This section evaluates the installation capabilities of hardware engineers to test candidates on their ability to plan and execute the installation of PowerScale hardware, prepare the maintenance site, and adhere to best practices when installing racks, nodes, and related components.
Topic 4	PowerScale Hardware Concepts: This part of the exam assesses the expertise of IT infrastructure architects, and emphasizes the ability to differentiate between the architectural elements of PowerScale platforms, understand their specific use cases, and compare design specifications across PowerScale hardware models.

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EMC Dell PowerScale Maintenance Exam Sample Questions (Q97-Q102):

NEW QUESTION # 97
An existing PowerScale cluster consists of four A300 and three F600 nodes.
What is the minimum number of nodes an engineer can add to expand both node pools?

A. 3xF600 4xA300
B. 2xA300 1x F600
C. txA300 2xF600
D. 2xA300 2xF600

Answer: B

Explanation:
In a Dell PowerScale cluster that consists of four A300 nodes and three F600 nodes, expanding both node pools requires adding nodes to each pool. The minimum number of nodes an engineer can add to expand both node pools is determined by the following factors:
* Minimum Node Addition:
* PowerScale clusters allow the addition of nodes one at a time to existing node pools.
* However, to maintain balanced performance and capacity, it's recommended to add nodes in pairs or according to specific guidelines for each node type.
* Node Pool Requirements:
* A300 Nodes (Capacity Tier):
* Designed for high-capacity storage needs.
* Adding at leasttwo A300 nodeshelps maintain even data distribution and protection levels.
* F600 Nodes (Performance Tier):
* Designed for high-performance all-flash storage requirements.
* Adding at leastone F600 nodecan expand the performance tier, but adding two would be optimal for balance.
* Minimum Nodes to Expand Both Pools:
* Option Dsuggests adding2xA300 and 1xF600, totalingthree nodes.
* This is the minimum number among the options provided that allows expansion of both node pools.
Why Option D is Correct:
* Meets Minimum Addition Recommendations:
* Adding2xA300 nodesenhances capacity while maintaining data protection schemes like FEC (Forward Error Correction).
* Adding1xF600 nodeincreases performance capacity with minimal investment.
* Ensures Data Protection and Performance:
* Adequate node addition helps in maintaining the cluster's data protection policies and performance characteristics.
References:
* Dell PowerScale OneFS Administration Guide- Guidelines on adding nodes to existing clusters.
* Dell PowerScale Best Practices- Recommendations for node additions and cluster expansions.
* Dell PowerScale Technical Specifications- Details on node types and their roles within a cluster.

NEW QUESTION # 98
What is the impact of network misconfiguration on a PowerScale cluster?

A. Loss of cluster quorum
B. Reduced data transfer speeds
C. Inability to perform node maintenance
D. Increased risk of data corruption

Answer: B

NEW QUESTION # 99
What security mechanism is used in the OneFS API to encrypt communications?

A. RBAC
B. HTTPS
C. SED
D. OpenSSH

Answer: B

Explanation:
The OneFS API usesHTTPS(HyperText Transfer Protocol Secure) to encrypt communications, ensuring secure data transfer between clients and the PowerScale cluster.
* OneFS API and Security:
* OneFS API:
* Provides a RESTful interface for programmatically managing and interacting with the PowerScale cluster.
* Security Importance:
* Protects sensitive data and configuration information transmitted via the API.
* Use of HTTPS:
* Encryption:
* HTTPS uses TLS (Transport Layer Security) to encrypt data in transit.
* Prevents eavesdropping and man-in-the-middle attacks.
* Authentication:
* Supports certificate-based authentication to verify the identity of the server.
* Standard Protocol:
* Widely accepted and supported for secure web communications.
* Why Other Options Are Less Suitable:
* Option A (SED):
* Self-Encrypting Drives (SEDs) encrypt data at rest, not communications.
* Option B (RBAC):
* Role-Based Access Control (RBAC) manages user permissions and authorization, not encryption.
* Option D (OpenSSH):
* OpenSSH provides secure shell access, not used for the OneFS API communications.
* Implementing HTTPS with OneFS API:
* Default Behavior:
* OneFS API endpoints are accessed via HTTPS by default on port 8080 or 8080.
* Certificate Management:
* Administrators can install custom SSL certificates to ensure secure connections.
* API Calls:
* Applications interacting with the OneFS API must support HTTPS requests.
Dell PowerScale References:
* Dell EMC PowerScale OneFS API Reference Guide:
* Details on API usage and security considerations.
* Dell EMC PowerScale OneFS API Reference Guide
* Dell EMC PowerScale OneFS Security Configuration Guide:
* Provides information on configuring HTTPS and managing certificates.
* Dell EMC PowerScale OneFS Security Guide
* Knowledge Base Articles:
* Article ID 000123006:"Securing OneFS API Communications with HTTPS"
* Article ID 000123007:"Configuring SSL Certificates for OneFS API Access"

NEW QUESTION # 100
What phase is crucial in the initial setup of a PowerScale cluster to ensure successful installation and deployment?

A. Assessing network infrastructure
B. Configuring data protection levels
C. Implementing cluster management tools
D. Validating hardware and software compatibility

Answer: D

NEW QUESTION # 101
A platform engineer needs to swap an NVDIMM battery. What prerequisite conditions are required to prevent data loss when removing the NVDIMM battery?

A. LEDs on the NVDIMM battery must be off
B. None - the NVDIMM battery is hot-swappable
C. The node is switched off and must be removed from the power feed
D. Node, LEDs on the node, LEDs on the NVDIMM, and LEDs on the NVDIMM battery must be off

Answer: D

Explanation:
Non-Volatile Dual In-line Memory Modules (NVDIMMs) are used in Dell EMC PowerScale nodes to enhance write performance and data protection. The NVDIMM battery provides backup power to ensure data in the NVDIMM is preserved during a power loss.
Prerequisite Conditions:
* Complete Power Off:
* The node must be completely powered off.
* All LEDs on the node, NVDIMM, and NVDIMM battery must be off to ensure no power is supplied.
* Prevent Data Loss:
* Removing the NVDIMM battery while power is present can lead to data loss in the NVDIMM.
* Ensuring all LEDs are off confirms that the NVDIMM has flushed its data and is safe to handle.
Why Other Options Are Incorrect:
* Option A (Hot-Swappable):
* The NVDIMM battery isnothot-swappable.
* Option B (Node Off and Removed from Power Feed):
* While the node should be off, additional confirmation of LEDs being off is necessary.
* Option C (LEDs on NVDIMM Battery Must Be Off):
* Not sufficient; all related LEDs must be off.
Dell PowerScale References:
* Dell EMC PowerScale Hardware Replacement Guide:
* Section on NVDIMM Battery Replacement:
* Specifies that the node and all related LEDs must be off before removing the NVDIMM battery.
* Provides step-by-step procedures to safely replace the battery.
* Safety Precautions:
* Wear ESD protection when handling internal components.
* Verify power status to prevent hardware damage and data loss.

NEW QUESTION # 102
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