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NEW QUESTION # 99
What is the recommended method for performing a fully automated upgrade of a PowerFlex cluster?
Answer: B
Explanation:
PowerFlex Manager (PFxM) is specifically designed to handle the complexity of the lifecycle management (LCM) for the solution.
The recommended method is using PFxM LCM because:
* Orchestration: It automatically determines the correct order of operations (e.g., MDM $\rightarrow$ SDS $\rightarrow$ SDC).
* Safety: It ensures the cluster is healthy before proceeding. It automatically places nodes into Maintenance Mode (PMM) to ensure data redundancy is maintained throughout the process.
* Compliance: It checks the nodes against a "Compliance File" (RCM - Release Certification Matrix) to ensure that the BIOS, Firmware, Drivers, and OS match the PowerFlex software version.
* Efficiency: Manual upgrades (Option A) are error-prone and time-consuming. Reinstalling the OS (Option C) is destructive and unnecessary. While MDMs are upgraded early in the process (Option D), doing it manually is not the recommended method for the whole cluster when PFxM is available.
NEW QUESTION # 100
Which specific operations can be performed on PowerFlex volumes? (Choose two)
Answer: A,B
Explanation:
PowerFlex Volumes are block-level storage devices mapped to hosts.
Create Snapshots (Option A): Snapshots are point-in-time copies of a volume. In PowerFlex, snapshots are writable and instantaneous. They share the same data blocks as the source volume until changes are made (Redirect-on-Write). They are essential for backups, testing/dev environments, and creating clones.
Enable Data Replication (Option D): PowerFlex supports native asynchronous and synchronous replication. This is configured at the Volume level (or via Consistency Groups containing volumes). You select a volume and pair it with a destination volume on a remote PowerFlex cluster to ensure disaster recovery.
NEW QUESTION # 101
Which feature of PowerFlex is leveraged to expand storage capacity in a cluster?
Answer: D
Explanation:
PowerFlex is a scale-out architecture.
* Dynamic Node Addition (Option B): This refers to the ability to add new x86 servers (nodes) to the cluster on the fly. When you add a node with local drives, the PowerFlex software automatically recognizes the new capacity. It then initiates a Rebalance operation, moving data chunks from existing full nodes to the new empty node until usage is uniform across the cluster. This process increases both Storage Capacity and Performance (IOPS/Bandwidth) linearly.
Incorrect Options:
* Fault Sets (A) organize nodes for availability, they do not add capacity.
* Snapshots (C) consume capacity.
* Shared File Systems (D) manage how capacity is accessed (NAS), not the expansion of the raw block layer.
NEW QUESTION # 102
While setting up a PowerFlex cluster, an administrator needs to create a Storage Pool. What tasks must they complete first?
Answer: A
Explanation:
This question tests your knowledge of the logical hierarchy in PowerFlex:
System $\rightarrow$ Protection Domain $\rightarrow$ Storage Pool $\rightarrow$ Device (Disk)
$\rightarrow$ Volume.
* Configure a Protection Domain (Option A): You cannot create a Storage Pool without a parent entity. The Protection Domain (PD) is the container that isolates a specific group of nodes. Once the PD is created, you create a Storage Pool inside it.
* The Workflow:
* Install SDS software on nodes.
* Create a Protection Domain (e.g., PD_1).
* Add SDS nodes to PD_1.
* Create a Storage Pool (e.g., Pool_SSD) inside PD_1.
* Add devices (drives) to Pool_SSD.
Options B and C are important validation steps, but A is the mandatory structural prerequisite.
NEW QUESTION # 103
Which tool is used to replicate volumes between PowerFlex clusters?
Answer: A
Explanation:
PowerFlex uses a dedicated replication logic often referred to conceptually as the Replication Engine (technically implemented via the SDR - Storage Data Replicator component in v3, or integrated into the SDS in v4).
Replication Engine (Option C): This component is responsible for intercepting writes to replicated volumes, bundling them, and transmitting them asynchronously (journal-based) to the remote destination cluster. It manages the Journal volumes, handles the bandwidth throttling, and ensures consistency between the source and target sites.
NEW QUESTION # 104
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