Free DELL EMC D-PSC-MN-01 Übungsprüfungen - Seite 2 von 5

Question #11

What is the required minimum number of PowerScale P100 and Bl 00 Accelerator nodes to add to a PowerScale cluster?

A . 2
B . 4
C . 1
D . 3

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Question #11

What is the required minimum number of PowerScale P100 and Bl 00 Accelerator nodes to add to a PowerScale cluster?

A . 2
B . 4
C . 1
D . 3

Lösung einblenden Lösung ausblenden

Question #13

Which resource should be consulted before performing any Dell PowerScale platform maintenance activities?

A . Dell SolVe Online
B . Dell Technical Support
C . Dell iDRAC Service Module
D . OneFS logs and error messages

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Question #14

The SSD has failed in a Dell EMC PowerScale H400 node that has one SSD installed. A technician is asked to replace it.

Where should the new drive be installed?

A . Left slot at the back of the node
B . Position 0 and sled A
C . Position 0 and sled E
D . Right slot at the back of the node

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Question #15

An SSD has failed in Node 1 in a Dell EMC PowerScale F200 cluster.

After replacing the drive, which command should be run to ensure the node has finished updating?

A . Isi devices -d
B . Isi status -h
C . Isi devices device list Cnode-Inn 1
D . Isi status -q

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Richtige Antwort: C
C

Explanation:

After replacing a failed SSD in Node 1 of a Dell EMC PowerScale F200 cluster, it’s important to verify that the node has recognized the new drive and has finished any necessary updates or rebuild processes.

Command to Verify Device Status:

isi devices device list –node-lnn 1:

This command lists all devices (drives) associated with Node 1.

It provides detailed information about each device, including status, health, and activity.

Why Option C is Correct:

Specific to Node 1:

The –node-lnn 1 parameter targets Node 1 directly.

Comprehensive Output:

The device list subcommand displays the status of all devices on the node.

Verification of Update Completion:

By reviewing the output, you can confirm that the new SSD is recognized and that any rebuild or

update processes have completed successfully.

Why Other Options Are Less Appropriate:

Option A (isi devices -d):

This command is incomplete and may not provide the necessary information.

Option B (isi status -h):

Provides a high-level cluster status but does not detail individual device statuses.

Option D (isi status -q):

Gives a quick summary of cluster status, similar to Option B.

Dell PowerScale

Reference: Dell EMC PowerScale OneFS CLI Administration Guide:

Section on isi devices Commands:

Explains how to use isi devices device list to view detailed device information.

Provides options to filter by node, device type, and status.

Steps to Verify Drive Replacement:

Run the Command:

bash

Copy code

# isi devices device list –node-lnn 1 Review Output:

Look for the new SSD in the list.

Check that the status is HEALTHY or OK. Confirm Rebuild Completion:

Ensure that there are no active jobs related to data protection or rebuilds. Use isi job status to check for running jobs.

Best Practices:

After Replacing a Drive:

Monitor the cluster for any alerts or errors. Ensure that data protection levels are restored. Documentation:

Record the replacement in maintenance logs.

Update any asset tracking systems with the new drive’s details. Additional Commands:

Check Cluster Health: arduino

Copy code

# isi status

List All Devices:

arduino

Copy code

# isi devices list

By using the isi devices device list –node-lnn 1 command, the platform engineer can confidently confirm that Node 1 has recognized the new SSD and that all necessary updates have been completed.

Question #15

An SSD has failed in Node 1 in a Dell EMC PowerScale F200 cluster.

After replacing the drive, which command should be run to ensure the node has finished updating?

A . Isi devices -d
B . Isi status -h
C . Isi devices device list Cnode-Inn 1
D . Isi status -q

Lösung einblenden Lösung ausblenden

Richtige Antwort: C
C

Explanation:

After replacing a failed SSD in Node 1 of a Dell EMC PowerScale F200 cluster, it’s important to verify that the node has recognized the new drive and has finished any necessary updates or rebuild processes.

Command to Verify Device Status:

isi devices device list –node-lnn 1:

This command lists all devices (drives) associated with Node 1.

It provides detailed information about each device, including status, health, and activity.

Why Option C is Correct:

Specific to Node 1:

The –node-lnn 1 parameter targets Node 1 directly.

Comprehensive Output:

The device list subcommand displays the status of all devices on the node.

Verification of Update Completion:

By reviewing the output, you can confirm that the new SSD is recognized and that any rebuild or

update processes have completed successfully.

Why Other Options Are Less Appropriate:

Option A (isi devices -d):

This command is incomplete and may not provide the necessary information.

Option B (isi status -h):

Provides a high-level cluster status but does not detail individual device statuses.

Option D (isi status -q):

Gives a quick summary of cluster status, similar to Option B.

Dell PowerScale

Reference: Dell EMC PowerScale OneFS CLI Administration Guide:

Section on isi devices Commands:

Explains how to use isi devices device list to view detailed device information.

Provides options to filter by node, device type, and status.

Steps to Verify Drive Replacement:

Run the Command:

bash

Copy code

# isi devices device list –node-lnn 1 Review Output:

Look for the new SSD in the list.

Check that the status is HEALTHY or OK. Confirm Rebuild Completion:

Ensure that there are no active jobs related to data protection or rebuilds. Use isi job status to check for running jobs.

Best Practices:

After Replacing a Drive:

Monitor the cluster for any alerts or errors. Ensure that data protection levels are restored. Documentation:

Record the replacement in maintenance logs.

Update any asset tracking systems with the new drive’s details. Additional Commands:

Check Cluster Health: arduino

Copy code

# isi status

List All Devices:

arduino

Copy code

# isi devices list

By using the isi devices device list –node-lnn 1 command, the platform engineer can confidently confirm that Node 1 has recognized the new SSD and that all necessary updates have been completed.

Question #17

What are the three phases of Dell EMC PowerScale implementation?

A . Implementation, Functional review, Handover
B . Implementation, Documentation, Handover
C . Planning, Implementation, Handover
D . Planning, Implementation, Acceptance

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Question #18

Which two rack solutions can support H500. H5600 and H700 models?

A . Titan A
B . Titan D
C . Titan HD
D . Third-Party Racks

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Question #19

What are the required settings when using terminal emulation software to connect to a Dell EMC PowerScale Gen 5 node?

A . Transfer Rate = 57.600, Data Bits = 8, Parity = 1, Stop Bits = 0, Flow Control = Software
B . Transfer Rate = 115.200, Data Bits = 8, Parity = None, Stop Bits = 1, Flow Control = Hardware
C . Transfer Rate = 57.600, Data Bits = 7, Parity = 1, Stop Bits = 8, Flow Control = Hardware
D . Transfer Rate = 115.200, Data Bits = 7, Parity = 1, Stop Bits = 1, Flow Control = Software

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Question #20

A company must ensure their PowerScale cluster can handle many active client connections.

What must they do when designing their system?

A . Include a Leaf-Spine backend network
B . Use the P100 node.
C . Add maximum RAM in each node.
D . Add L3 cache to the nodes.

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Richtige Antwort: A
A

Explanation:

To ensure a Dell PowerScale cluster can handle many active client connections, the company should include a Leaf-Spine backend network in their system design.

Understanding Network Topologies:

Leaf-Spine Architecture:

A high-performance network topology designed to handle large amounts of east-west (node-to-node) traffic.

Consists of two network layers: leaf switches (access layer) and spine switches (aggregation layer). Every leaf switch connects to every spine switch, providing multiple pathways and reducing bottlenecks.

Benefits for PowerScale Clusters: Scalability:

Supports a large number of nodes and client connections without significant degradation in performance.

Low Latency:

Reduces hop count between any two endpoints, minimizing latency. High Throughput:

Provides increased bandwidth to accommodate many active connections. Redundancy:

Multiple pathways between nodes enhance fault tolerance.

Handling Many Active Client Connections:

Network Bandwidth:

A Leaf-Spine network ensures sufficient bandwidth is available for client connections and data

movement.

Load Balancing:

Distributes client connections evenly across the network to prevent overloading any single path.

Reduced Contention:

Minimizes network congestion, leading to improved client experience.

Why Other Options Are Less Suitable:

Option B (Use the P100 node):

P100 nodes are accelerator nodes that enhance performance but do not specifically address handling many client connections.

Option C (Add maximum RAM in each node):

While increasing RAM can improve performance, it does not directly impact the cluster’s ability to

handle numerous client connections.

Option D (Add L3 cache to the nodes):

Adding L3 cache improves data retrieval speeds but does not significantly affect network capacity for client connections.

Dell PowerScale

Reference: Dell EMC PowerScale Network Design Considerations:

Discusses network topologies and their impact on cluster performance.

Dell EMC PowerScale Network Design Considerations

Dell EMC PowerScale Best Practices Guide:

Recommends network architectures for optimal performance.

Dell EMC PowerScale Best Practices

Knowledge Base Articles:

Article ID 000123002: "Implementing Leaf-Spine Architecture for PowerScale Clusters"

Article ID 000123003: "Scaling Client Connections in Dell PowerScale Environments"