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Dell D-PSC-MN-01 Exam Prep
Dell PowerScale Maintenance Version 2 (Page 8 )

Updated On: 24-Aug-2026
Page 4 of 22
PDF with 101 Questions

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?

  1. txA300 2xF600
  2. 2xA300 2xF600
  3. 3xF600 4xA300
  4. 2xA300 1x F600

Answer(s): D

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 least two A300 nodes helps maintain even data distribution and protection levels.
F600 Nodes (Performance Tier):
Designed for high-performance all-flash storage requirements. Adding at least one F600 node can expand the performance tier, but adding two would be optimal for balance.
Minimum Nodes to Expand Both Pools:
Option D suggests adding 2xA300 and 1xF600, totaling three 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:
Adding 2xA300 nodes enhances capacity while maintaining data protection schemes like FEC (Forward Error Correction).
Adding 1xF600 node increases 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.


Reference:

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.



What type of upgrade on a Dell PowerScale cluster requires the least amount of time?

  1. Simultaneous
  2. Parallel
  3. Rolling
  4. Automatic

Answer(s): A

Explanation:

A simultaneous upgrade on a Dell PowerScale cluster involves upgrading all nodes at the same time. This method requires the least amount of time compared to other upgrade types because it minimizes the total duration by handling the upgrade process concurrently across the entire cluster.
Types of Upgrades:
Simultaneous Upgrade:
Definition: All nodes are upgraded at the same time.
Advantages:
Fastest upgrade method.

Reduces total upgrade time significantly.
Disadvantages:
Requires cluster downtime; not suitable for environments that need continuous availability.
Rolling Upgrade:
Definition: Nodes are upgraded one at a time or in small groups.
Advantages:
No cluster downtime; services remain available.
Disadvantages:
Takes longer to complete as each node is upgraded sequentially.
Parallel Upgrade:
Definition: Nodes are upgraded in parallel batches.
Advantages:
Balances upgrade speed and availability.
Disadvantages:
May still require some service interruption.
Automatic Upgrade:
Definition: The upgrade process is automated but follows the rolling or parallel methodology.
Advantages:
Reduces manual intervention.
Disadvantages:
Upgrade time depends on the underlying method used (rolling or parallel).
Why Simultaneous Upgrade Requires the Least Amount of Time:
Concurrent Processing: Upgrading all nodes at once leverages parallelism, drastically reducing the total time needed.
No Sequential Steps: Eliminates the wait time associated with upgrading nodes one after another. Use Case Considerations: Suitable for non-production clusters or environments where downtime is acceptable.
Important Considerations:
Cluster Downtime: Simultaneous upgrades will render the cluster unavailable during the process. Risk Management: Any issues during the upgrade can affect the entire cluster; thorough planning and backups are essential.


Reference:

Dell PowerScale OneFS Upgrade Planning and Process Guide ­ Details on upgrade methods and best practices.
Dell PowerScale Administration Guide ­ Instructions and considerations for performing cluster upgrades.
Best Practices for OneFS Upgrades ­ Recommendations for selecting the appropriate upgrade method based on environment needs.



Refer to the exhibit.



An engineer replaced the drive in C1. They run the isi devices drive list command and obtain the output that is shown.
What action must the engineer take?

  1. Run the 1 = 1 devices drive add c1 command.
  2. Run the isi devices drive format C1 command.
  3. Contact Dell support.
  4. Update the drive firmware.

Answer(s): B

Explanation:

In the output of the isi devices drive list command shown in the exhibit, the drive in location C1 is marked as "USED," with the serial number VRKL242P. This indicates that the drive has been replaced but has not yet been initialized or formatted for use within the PowerScale cluster. To make the drive usable, it must be formatted. The correct procedure to follow is to use the isi devices drive format command, specifying the drive location (C1 in this case). This will prepare the drive for use in the cluster, ensuring that it is recognized and available for OneFS to start writing data to it.

Steps to format the drive:
Log in to the OneFS cluster using an SSH session with an account that has the necessary privileges.
Run the following command to format the new drive:
bash
Copy code isi devices drive format C1
This command will format the drive located at C1, making it available for use in the cluster. After the format is complete, verify that the drive is now in a HEALTHY state by running:

isi devices drive list
This should display the new status of the drive as HEALTHY, indicating that it has been successfully formatted and is ready for data operations.

This process is outlined in Dell's PowerScale Administration Guide and ensures the correct initialization of new or replaced drives.



What is the isi diagnostics gather command used for?

  1. Diagnose the CPU.
  2. Diagnose the TPM
  3. Gather performance data.
  4. Gather cluster logs

Answer(s): D

Explanation:

The isi diagnostics gather command is used in Dell PowerScale (formerly known as Isilon) clusters to collect comprehensive diagnostic information, including system logs, configuration files, and other pertinent data from all nodes in the cluster. This gathered information is essential for troubleshooting and is often requested by Dell Support to diagnose and resolve issues.

Purpose of isi diagnostics gather:
The command aggregates logs and diagnostic information across the entire cluster. It collects data such as event logs, configuration settings, and performance metrics.
Use Cases:
Troubleshooting: When experiencing issues with the cluster, this command helps in collecting necessary data for analysis.
Support Assistance: Dell Support may request the output from this command to assist in diagnosing cluster problems.
Process:
When executed, the command generates a single compressed file containing all the collected information.
The file can be securely sent to Dell Support for further analysis.
Dell PowerScale Reference
Dell EMC PowerScale OneFS CLI Administration Guide: This guide provides detailed information on command-line utilities, including isi diagnostics gather. Dell EMC Knowledge Base Articles: Articles related to troubleshooting often reference the use of isi diagnostics gather to collect logs.



Which model is a part of the Isilon Gen6 platform?

  1. F600
  2. F810
  3. F900
  4. F200

Answer(s): B

Explanation:

The Isilon Gen6 platform includes several models designed to meet various performance and capacity needs. The F810 is part of the Gen6 family and is specifically an all-flash node offering high performance and efficiency.

Isilon Gen6 Platform Overview:
Gen6 platforms are known for their modular architecture and enhanced performance. They offer improved scalability and efficiency over previous generations.
F810 Model Details:
All-Flash Storage: The F810 is an all-flash node, providing low latency and high throughput. High Capacity: It offers large storage capacities suitable for demanding workloads. Use Cases: Ideal for high-performance computing, real-time analytics, and workloads requiring rapid data access.
Other Models:
F600 and F900: These are part of the Dell EMC PowerScale family introduced after the Isilon rebranding and are not Gen6 Isilon models.
F200: Also part of the newer PowerScale lineup, not associated with the Isilon Gen6 platform.
Dell PowerScale Reference
Dell EMC Isilon Gen6 Technical Overview: Documentation outlining the features and models included in the Gen6 series.
Dell EMC Isilon F810 Data Sheet: Provides specifications and details about the F810 model. Product Support Pages: Offer information on the various models within the Isilon and PowerScale families.



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