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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Expanding and Maintaining PowerFlex Cluster | 28% | - Add nodes and scale resources - Configure and manage SDC and MDM roles - Use maintenance modes correctly - Understand integration with Dell APEX |
| Topic 2: PowerFlex Upgrades | 9% | - Understand upgrade process and requirements - Perform cluster software upgrades |
| Topic 3: PowerFlex Logical Entities | 18% | - Understand templates and resource groups - Configure protection domains, fault sets and storage pools |
| Topic 4: Protecting PowerFlex Storage | 8% | - Use snapshots for point-in-time copies - Configure and manage cross-cluster replication |
| Topic 5: PowerFlex Storage Operations | 8% | - Work with storage data targets - Create, manage and modify volumes - Configure and manage shared file systems |
| Topic 6: PowerFlex Components and Resource Discovery | 25% | - Use management interfaces (GUI, CLI, REST API) - Complete post-installation configuration tasks - Identify PowerFlex hardware models and software components |
| Topic 7: PowerFlex Security | 12% | - Manage user accounts and access control - Configure system alerts and auditing - Integrate CloudLink for encryption |
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질문 # 28
A node failure occurs in a PowerFlex cluster. What ensures that data remains accessible?
정답：D
설명：
PowerFlex distributes and replicates data across multiple SDS nodes. If a node fails, data remains accessible from other nodes, ensuring high availability. RAID alone does not protect across nodes.
질문 # 29
Which operations are supported for managing snapshots in PowerFlex? (Choose two).
정답：A,C
설명：
PowerFlex offers robust snapshot management capabilities accessible via the PowerFlex Manager UI, CLI (SCLI), and REST API.
* Schedule automatic snapshot creation (Option D): PowerFlex supports Snapshot Policies.
Administrators can define policies that automatically generate snapshots at specific intervals (e.g., every hour, daily, or weekly) and define retention rules (how many snapshots to keep). This automation is critical for meeting Recovery Point Objectives (RPO) without manual intervention.
* Restore data from a snapshot (Option A): PowerFlex allows administrators to restore a volume to a previous state using a snapshot. In the CLI, this is often handled by the command overwrite_volume_content, where the content of the production volume is replaced by the data in the snapshot. This is essential for recovering from data corruption or ransomware events.
Why not B? In PowerFlex, snapshots are already writable volumes by default immediately upon creation.
There is no need to "convert" them; they can be mapped to a host and written to instantly.
Why not C? Deduplication is a property of the Storage Pool (specifically in Fine Granularity pools), not a specific operation triggered on a snapshot.
질문 # 30
Enabling Maintenance Mode on a node allows it to be removed from the cluster without impacting data availability.
정답：A
설명：
True: The specific purpose of Protected Maintenance Mode (PMM) is to ensure data availability.
How it works: When you enable PMM on a node, the system checks the data chunks residing on that node. Before the node is allowed to effectively "leave" the cluster (stop serving I/O), PowerFlex copies (mirrors) that data to other nodes in the cluster. This ensures that even when the node is physically removed or rebooted, the cluster retains the required number of data copies (redundancy), ensuring no data is unavailable (DU) or lost (DL).
질문 # 31
What is the default state of snapshots created in PowerFlex?
정답：B
설명：
* Editable (Writable): Unlike many traditional storage arrays where a snapshot is a read-only frozen image requiring a "clone" to become writable, PowerFlex snapshots are fully writable volumes by default.
* Behavior: Immediately upon creation, a snapshot is mapped as a volume. You can mount it to a host, write new data to it, delete files from it, or format it, without affecting the source parent volume (due to the Redirect-on-Write architecture).
질문 # 32
What is the primary function of storage data targets in PowerFlex?
정답：C
설명：
In PowerFlex terminology, the Storage Data Server (SDS) acts as the "Target" for I/O operations.
* Organize drives for storage pools (Option B): The SDS takes ownership of the local physical drives (NVMe/SSD/HDD) installed in the server. It aggregates these drives and contributes them to the Storage Pool. It handles the reading and writing of data blocks to this physical media.
Incorrect Options: Metadata is managed by the MDM (A). Access to external resources (C) is not the function of the SDS (which provides internal storage). Deduplication (D) is a specific feature, not the primary function of the component.
질문 # 33
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