D-PSC-MN-01 Dell PowerScale Maintenance Version 2 Practice Questions
Prepare for D-PSC-MN-01 with more than an answer.
- Level
- Skills-based
- Valid for
- Does not expire once achieved
Domains covered on the exam 4
- PowerScale Hardware Concepts25%
- PowerScale Hardware Maintenance25%
- PowerScale Hardware Installation25%
- PowerScale Implementation25%
- 1
An engineer is unboxing and racking new PowerScale nodes at a customer site. According to Dell's standard installation procedures, what is a critical physical verification step that must be performed on the node's internal components after removing the top cover but before applying power for the first time?
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Correct answer: A
Components such as DIMMs and PCIe risers can become dislodged during shipping. A standard and critical part of the installation process is to open the chassis and visually and physically inspect these components to ensure they are firmly seated in their sockets. Failure to do so can lead to boot failures or unstable operation.
- 2
A systems administrator needs to replace a failed journal drive on a PowerScale node. To ensure data integrity, the node's journal must be moved to another available drive before the failed drive can be physically replaced. The command to perform this action is
isi_____.Show answer details
Correct answer: B
The
isi_radishcommand is the utility used to manage the journal. The-mflag is used to move the journal from its current location to another suitable drive within the node. This is a critical step before replacing a failed journal drive to prevent data loss and ensure a clean shutdown of journaling services. - 3
Company Background:
Global Media Inc. (GMI) operates a large PowerScale environment for its video-on-demand platform. Their primary cluster consists of 20 F-series All-Flash nodes for high-performance transcoding and a separate 30-node A-series Archive cluster for long-term media preservation. Both clusters are approaching 85% capacity utilization.Current Situation:
GMI has acquired a new content library and must add significant capacity and performance for a new 4K streaming service. The new workload requires a balance of high-capacity storage for large video files and high-throughput performance to serve multiple concurrent streams, but it does not require the extreme low latency of the all-flash transcoding tier. The existing data center has rack space and power, but the network team has mandated that any new nodes must connect to a new 100GbE network fabric, whereas the existing clusters use 40GbE.Requirements:
- Add at least 5 Petabytes of usable capacity.
- Provide high sequential read throughput for streaming.
- Integrate the new nodes into the existing PowerScale management domain.
- Connect the new nodes to the new 100GbE network fabric.
- The solution must be cost-effective, avoiding the expense of all-flash for this specific workload.
Which solution best meets all of GMI's requirements?
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Correct answer: C
This is the optimal solution. H-series nodes provide the required balance of capacity and performance for streaming. Adding them to the existing primary cluster leverages the single management domain. Creating a new node pool isolates them for the specific workload, and configuring a new subnet/IP pool allows them to connect to the 100GbE fabric while coexisting in the same cluster with the 40GbE nodes. A dedicated SmartConnect zone directs the streaming application traffic to the correct nodes.
- 4
A PowerScale cluster is designed with a physically separate and redundant backend network. What is the primary purpose of this dedicated backend network?
graph TD subgraph "Client-Facing Network (Frontend)" direction LR FSW1[Frontend Switch 1] FSW2[Frontend Switch 2] end subgraph "PowerScale Cluster" direction TB Node1 -- Frontend Port 1 --> FSW1 Node1 -- Frontend Port 2 --> FSW2 Node2 -- Frontend Port 1 --> FSW1 Node2 -- Frontend Port 2 --> FSW2 Node3 -- Frontend Port 1 --> FSW1 Node3 -- Frontend Port 2 --> FSW2 Node1 -- Backend Port 1 --> BSW1 Node1 -- Backend Port 2 --> BSW2 Node2 -- Backend Port 1 --> BSW1 Node2 -- Backend Port 2 --> BSW2 Node3 -- Backend Port 1 --> BSW1 Node3 -- Backend Port 2 --> BSW2 end subgraph "Internal Network (Backend)" direction LR BSW1[Backend Switch 1] BSW2[Backend Switch 2] end Clients((Clients)) --> FSW1 Clients((Clients)) --> FSW2Show answer details
Correct answer: B
The dedicated backend network is crucial for the performance and stability of the OneFS distributed file system. It carries all internode traffic, including data layout, protection/rebuild operations, and cache coherency messages. Isolating this traffic from the frontend (client) network ensures that heavy client load does not impact the cluster's internal operations and vice-versa, guaranteeing predictable performance and resilience.
- 5
A new PowerScale node has been physically racked and cabled. An engineer connects to the serial console to perform the initial configuration. The cluster setup wizard prompts for the type of cluster to create or join. Which of the following is NOT a valid cluster creation option presented during this initial setup process?
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Correct answer: C
During the initial text-based configuration wizard, the options are to create a new standard cluster or join an existing one. While a cluster can be put into compliance mode, this is a post-creation step performed using the
isi compliancecommand. It is not an option presented at the initial moment of cluster formation in the setup wizard. - 6
A technician is dispatched to a remote data center to replace a failed M.2 boot drive in a PowerScale F600 node, which is a Customer Replaceable Unit (CRU). After physically swapping the drive, the technician boots the node. The node fails to join the cluster, and the front panel LCD displays a 'Configuration Mismatch' error. What is the most likely cause of this issue and the required next step?
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Correct answer: B
Replacing a boot drive (CRU) requires more than just a physical swap. The new drive is unconfigured and does not contain the OneFS operating system or the node's specific configuration. The correct procedure is to reimage the node using a USB drive prepared with the appropriate OneFS installation image. This process installs the OS and allows the node to rejoin the cluster and sync its configuration.
- 7
An engineer is attempting to add a used PowerScale H500 node, previously part of a decommissioned lab cluster, into a new production cluster running a different version of OneFS. The standard 'Join an existing cluster' process fails repeatedly. The engineer has confirmed full network connectivity between the new node and the production cluster's backend network. Which procedure is required to successfully integrate this node?
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Correct answer: C
When a node has been part of a previous cluster, it retains that cluster's identity, configuration, and OneFS version. A simple reformat is often insufficient, especially when moving between OneFS versions. The correct and most reliable procedure is to reimage the node. This process completely erases the boot and journal drives, installing a fresh copy of the desired OneFS version and removing all traces of the old cluster's identity, allowing it to join the new cluster as if it were a new node.
- 8
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?
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Correct answer: C
The
isi_hw_statuscommand 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 -vgives general cluster status but lacks the granular hardware detail needed here.isi_radish -qis for checking the RAD (Rapid Array of Disks) service.isi event events listshows the cluster-wide event log, which would show the fault but not provide the live diagnostic data needed to troubleshoot the component. - 9
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)
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Correct answer: 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.
- 10
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?
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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.
