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Dell EMC

Dell PowerScale Maintenance Version 2 Free Sample Questions

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D-PSC-MN-01 Sample Questions

  1. Q1

    A maintenance engineer has just replaced a faulty Power Supply Unit (PSU), a Field Replaceable Unit (FRU), in a PowerScale Gen 6.5 F600 node. After powering the node back on, the OneFS WebUI continues to display a critical hardware alert for the same PSU slot. The node's amber fault LED remains illuminated. The engineer has already reseated the new PSU and confirmed power is being supplied from the PDU. Which command should the engineer run next via an SSH session to the node to gather detailed fault data and determine if the issue is with the new PSU, the slot, or the midplane?

    Show answer & explanation

    Correct answer: C

    The isi_hw_status command provides a detailed, real-time report of the hardware components and their status, including sensors, fans, and power supplies. It polls the hardware directly and can help differentiate between a faulty replacement part and a more serious issue with the node's midplane or the PSU slot itself. isi status -v gives general cluster status but lacks the granular hardware detail needed here. isi_radish -q is for checking the RAD (Rapid Array of Disks) service. isi event events list shows the cluster-wide event log, which would show the fault but not provide the live diagnostic data needed to troubleshoot the component.

    Timed and flashcard mode in the Simulator
  2. Q2Multiple answers

    An administrator is planning a rolling upgrade of a large, mixed-generation PowerScale cluster from OneFS 9.4 to 9.8. The cluster contains both Gen 6 and newer Gen 6.5 nodes. To minimize risk and ensure a smooth upgrade process, which THREE of the following actions are mandatory pre-upgrade validation steps? (Select THREE)

    Show answer & explanation

    Correct answers: A, B, E

    Running the On-Cluster Analysis tool (or Upgrade Compatibility Check) is a critical step that assesses the cluster's health and readiness for an upgrade, identifying potential issues that could cause complications.

    The Supportability and Compatibility Guide is essential for identifying required firmware versions for node components (like NICs and disk controllers) that must be updated before the OneFS upgrade to prevent incompatibility issues.

    Proper DNS resolution for all nodes is a fundamental requirement for cluster communication and is checked by the pre-upgrade validation tools. A failure in DNS can halt the upgrade process.

    Timed and flashcard mode in the Simulator
  3. Q3

    A financial services firm is deploying a new 10-node PowerScale H7000 hybrid cluster in a high-density data center. The deployment is managed by a third-party contractor, and your role is to perform the final validation before the installation team proceeds with racking and cabling the equipment, which has just arrived on site.

    The contractor provides you with a completed Product Evaluation Questionnaire (PEQ) and a set of installation documents generated by the SolVe Desktop tool. The PEQ indicates that the data center has specific, non-standard power distribution, using 208V 30A circuits with L6-30R receptacles. The data center operations team has also mandated that no single rack can exceed 80% of its provisioned power budget.

    Given this scenario, what is the most critical verification step you must perform before authorizing the contractor to begin the physical installation?

    Show answer & explanation

    Correct answer: B

    This is the most critical step. The SolVe tool generates procedures based on standard inputs, but these must be validated against the specific, real-world conditions documented in the PEQ. A mismatch between the SolVe plan's assumed power infrastructure (e.g., standard PDUs) and the actual site's non-standard receptacles and power budget (L6-30R, 80% rule) could halt the entire installation or lead to unsafe conditions. Verifying this alignment ensures the fundamental site requirements for power and safety are met before any physical work begins.

    Timed and flashcard mode in the Simulator
  4. Q4

    A technician is adding a new PowerScale node to an existing cluster. The cluster utilizes a leaf-spine network architecture with two redundant backend switches for the node interconnect and two redundant front-end switches for client access. According to Dell's best practices for ensuring maximum availability and performance, which cabling scheme is correct for the new node?

    graph TD subgraph New Node BE1[Backend Port 1] BE2[Backend Port 2] FE1[Front-End Port 1] FE2[Front-End Port 2] end subgraph Backend Network BSW1[Backend Switch 1] BSW2[Backend Switch 2] end subgraph Front-End Network FSW1[Front-End Switch 1] FSW2[Front-End Switch 2] end BE1 -->|?| BSW1 BE1 -->|?| BSW2 BE2 -->|?| BSW1 BE2 -->|?| BSW2 FE1 -->|?| FSW1 FE1 -->|?| FSW2 FE2 -->|?| FSW1 FE2 -->|?| FSW2
    Show answer & explanation

    Correct answer: B

    This cabling scheme follows the best practice for high availability and redundancy. By connecting each backend port to a different backend switch, the node can survive the failure of an entire switch without losing its connection to the cluster's internal network. Similarly, connecting each front-end port to a different front-end switch ensures that a single switch failure does not isolate the node from client traffic. This provides full path redundancy for both critical networks.

    Timed and flashcard mode in the Simulator
  5. Q5

    A storage administrator has replaced a failed drive in a PowerScale F200 node. After the replacement, the drive's LED remains amber, and the drive is not recognized by OneFS. The administrator has already confirmed the drive is correctly seated and the event log shows a generic 'drive failed' event. Which command should the administrator run FIRST to gather specific hardware-level details about the drive bay and its connection status to determine if the issue is with the drive, the bay, or the backplane?

    Show answer & explanation

    Correct answer: D

    The isi_radish -q command is the correct first step for deep hardware diagnostics in this scenario. It queries the drive sled controller (radish) directly, providing low-level status about the drive, its bay, and its connection to the node's backplane. This command can reveal issues that are not yet visible in the higher-level OneFS event logs or status commands. isi event is too generic, isi status -v provides OneFS-level status but not deep hardware diagnostics, and isi_hw_status gives a general overview of components but lacks the specific detail needed to diagnose a bay or sled controller issue.

    Timed and flashcard mode in the Simulator
  6. Q6Multiple answers

    A systems engineer is preparing to perform a major OneFS upgrade on a production PowerScale cluster from version 9.4.x to 9.8.x. The cluster consists of both Gen 6 and Gen 6.5 nodes. To minimize risk and ensure a successful rolling upgrade, which THREE of the following pre-upgrade checks are mandatory? (Select THREE)

    Show answer & explanation

    Correct answers: A, B, E

    Timed and flashcard mode in the Simulator
  7. Q7

    An installation engineer arrives at a customer site to deploy a new PowerScale cluster. The engineer has a set of SolVe-generated documents that detail a standard installation in Rack 10, with power drawn from PDUs A and B. However, the customer provides a recently updated Product Evaluation Questionnaire (PEQ) which states that due to a last-minute data center change, Rack 10 is no longer available and the cluster must be installed in Rack 15. The PEQ also specifies that Rack 15's PDUs C and D are fed from a different power circuit with a lower amperage rating than originally planned for Rack 10.

    Given this discrepancy between the formal SolVe plan and the customer's on-site PEQ, what is the most critical validation step the engineer must perform before physically racking any of the PowerScale nodes?

    Show answer & explanation

    Correct answer: D

    This is the most critical step. The PEQ explicitly states a change to a lower-rated power circuit. The primary risk is that the new circuit cannot handle the maximum power draw of the PowerScale cluster, leading to tripped breakers, power failure, and potential hardware damage. The engineer must halt the installation and validate that the power infrastructure in Rack 15 is sufficient before proceeding with any physical racking. All other checks are secondary to this fundamental power and safety requirement.

    Timed and flashcard mode in the Simulator
  8. Q8

    A technician is cabling a new PowerScale node into a rack that contains two redundant backend InfiniBand or Ethernet switches (Switch 1 and Switch 2) for internal cluster communication, and two redundant front-end Ethernet switches (Switch A and Switch B) for client access. To ensure maximum network resiliency and high availability according to Dell's best practices, how should the node's network ports be connected?

    Show answer & explanation

    Correct answer: A

    This configuration provides full redundancy. The loss of any single switch (either backend or front-end) will not cause the node to lose connectivity. Each network type (backend and front-end) has a connection to each of its respective redundant switches, which is the standard best practice for ensuring high availability.

    graph TD subgraph Node B1[Backend Port 1] B2[Backend Port 2] F1[Front-end Port 1] F2[Front-end Port 2] end subgraph Backend Switches BS1[Backend Switch 1] BS2[Backend Switch 2] end subgraph Front-end Switches FS_A[Front-end Switch A] FS_B[Front-end Switch B] end B1 --> BS1 B2 --> BS2 F1 --> FS_A F2 --> FS_B

    Timed and flashcard mode in the Simulator
  9. Q9

    A maintenance engineer is tasked with replacing a faulty Battery Backup Unit (BBU) in a PowerScale Gen 6.5 node that has reported a critical hardware alert. After physically swapping the FRU, which CLI command should the engineer use to specifically verify the status, charge level, and health of the newly installed BBU?

    Show answer & explanation

    Correct answer: D

    The isi_get_bbu_status command is the specific utility designed to query and display detailed information about the Battery Backup Unit, including its charge state, health, and firmware. While isi_hw_status provides a general overview of hardware, it does not offer the same level of detail for the BBU. isi devices is for managing drives, and isi_radish is for checking the journal's state, not BBU status.

    Timed and flashcard mode in the Simulator
  10. Q10

    During a pre-upgrade health check for a move to OneFS 9.8, an administrator's script flags several nodes for having outdated NIC firmware, which is below the minimum version required in the PowerScale Supportability and Compatibility Guide. The upgrade process has been halted. Which sequence of actions is the correct way to remediate this issue before resuming the OneFS upgrade?

    Show answer & explanation

    Correct answer: B

    The correct procedure is to pause the OneFS upgrade and address the firmware dependency separately. This involves obtaining the correct Node Firmware Package (NFP) and applying it to bring the NICs up to the required level. OneFS upgrades do not automatically include all component firmware and proceeding without meeting prerequisites can cause instability or failure. Updating firmware simultaneously before resuming the upgrade is the standard, prescribed method.

    Timed and flashcard mode in the Simulator

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