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EMC Dell PowerScale Maintenance Exam Sample Questions (Q39-Q44):
NEW QUESTION # 39
A platform engineer is tasked with adding F600 nodes to an existing Dell EMC PowerScale cluster. After racking and stacking the F600 nodes, they determine that the cluster contains X210 and H400 nodes.
What should the platform engineer consider?
Answer: D
Explanation:
Adding F600 nodes to an existing cluster requires compatibility in back-end networking.
Key Considerations:
* Back-End Networking:
* F600 Nodes:Use Ethernet for internal communication.
* Existing Nodes (X210 and H400):May be using InfiniBand.
* Action Required:
* Upgrade the cluster's back-end to Ethernet topology to accommodate F600 nodes.
Why Other Options Are Incorrect:
* Option A:H400 nodes can coexist with F600 nodes if back-end networking is compatible.
* Option B:F600 nodes do not use InfiniBand.
* Option C:F600 nodes can coexist with X210 nodes with the appropriate back-end network.
Dell PowerScale References:
* Dell EMC PowerScale Networking Guide:
* Back-End Network Compatibility:
* Discusses requirements for mixing node types.
* Upgrading Back-End Network:
* Provides steps for transitioning from InfiniBand to Ethernet.
* Best Practices:
* Plan the network upgrade carefully to minimize downtime.
* Consult with Dell EMC support for guidance.
NEW QUESTION # 40
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?
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 # 41
Why is it necessary to verify the cluster's health status before performing any hardware maintenance?
Answer: A
NEW QUESTION # 42
What is done with the components when a Gen6 single node is replaced?
Answer: C
Explanation:
When a Dell PowerScale Gen6 single node is replaced, the standard procedure is to return the entire faulty node, including all its components, back to Dell. This ensures proper handling, compliance with warranty agreements, and allows Dell to perform failure analysis if necessary.
* Node Replacement Process:
* Faulty Node Identification:A node exhibiting issues is identified for replacement.
* Data Protection:Before replacement, data is protected via OneFS, which ensures data is redistributed across the cluster to prevent data loss.
* Replacement Node Shipment:Dell ships a replacement node to the customer.
* Handling of Components:
* No Component Swapping:Components such as drives, memory modules, and CPUs are not transferred from the old node to the new one.
* Return Procedure:The entire faulty node, with all its components intact, is returned to Dell.
* Purpose of Return:Returning the node allows Dell to:
* Perform Diagnostics:Analyze the faulty components for failures.
* Manage Inventory:Ensure proper accounting of hardware.
* Environmental Compliance:Dispose of or recycle components according to regulations.
* Dell's Return Material Authorization (RMA) Policy:
* RMA Process:Dell issues an RMA for the faulty node, and the customer is responsible for returning it.
* Shipping Instructions:Detailed instructions are provided to safely package and ship the node back to Dell.
Dell PowerScale References:
* Dell EMC PowerScale Field Replacement Unit (FRU) Installation and Replacement Guide:
* Outlines the procedures for replacing nodes and the requirement to return faulty units to Dell.
* Dell EMC PowerScale OneFS Administration Guide:
* Provides information on cluster maintenance and node management.
* Warranty and Support Agreements:
* Specify the obligations for returning faulty hardware under service contracts.
NEW QUESTION # 43
An engineer replaced a failed node in a PowerScale H500 due to hardware issues. They must verity that the replacement node is functioning correctly.
What is a crucial step when replacing the failed node in the cluster?
Answer: A
Explanation:
After replacing a failed node in a PowerScale H500 cluster, it is crucial torun a diagnostic test on the replacement nodeto ensure it is functioning correctly and can integrate seamlessly into the cluster.
* Importance of Diagnostics:
* Verify Hardware Functionality:
* Ensures all components of the replacement node are working properly.
* Identify Potential Issues:
* Detects any hardware faults or configuration problems before the node joins the cluster.
* Diagnostic Procedures:
* Boot Diagnostics:
* During startup, the node performs POST (Power-On Self-Test).
* OneFS Healthcheck:
* Use the isi diagnostics commands to run health checks on the node.
* Cluster Integration Tests:
* Verify network connectivity, storage availability, and cluster communication.
* Steps to Run Diagnostics:
* Physical Inspection:
* Ensure all cables and components are properly connected.
* Power On the Node:
* Observe for any error lights or beep codes.
* Execute Diagnostic Commands:
* Run isi_hw_status to check hardware status.
* Use isi_diag tools for comprehensive testing.
* Review Logs:
* Check system logs for any error messages.
* Why Other Options Are Less Crucial:
* B. Confirm that the replacement node inherits the old serial number from the cluster:
* Serial numbers are hardware-specific and cannot be inherited.
* Nodes have unique serial numbers; cluster identity is managed logically.
* C. Verify the size of the storage capacity of the replacement node:
* While important, it's generally assumed that the replacement node matches the failed node's specifications.
* Not as crucial as ensuring the node functions correctly.
* D. Power on the replacement node and ensure it connects to the network without any problems:
* Necessary, but this is part of the diagnostic process.
* Running diagnostics encompasses powering on and verifying network connectivity.
Dell PowerScale References:
* Dell EMC PowerScale OneFS Administration Guide:
* Provides information on monitoring and diagnostics commands.
* Node Replacement Procedures in SolVe Online:
* Outline the steps for replacing nodes and the importance of running diagnostics.
* Best Practices for Cluster Maintenance:
* Emphasize verifying node health before adding it to the cluster.
NEW QUESTION # 44
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