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質問 # 83
A node failure occurs in a PowerFlex cluster. What ensures that data remains accessible?
正解:D
解説:
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.
質問 # 84
Which PowerFlex model includes integrated compute and storage in a single appliance?
正解:D
解説:
PowerFlex Appliance is the model that offers a flexible, semi-customizable solution that includes both compute and storage resources within a single managed server node (Hyper-Converged Infrastructure).
* PowerFlex Appliance: This offering allows customers to start small and scale. It provides the full PowerFlex software stack pre-installed on qualified hardware (like Dell PowerEdge R650/R750 nodes) that contributes both processing power (Compute) and disk capacity (Storage) to the cluster.
* Differentiation:
* PowerFlex Rack (C) is a fully engineered, rack-scale system including integrated networking (Cisco/Dell switches) and is sold as a complete rack, not just "a single appliance."
* PowerFlex Manager (D) is the management software, not the hardware model.
質問 # 85
Which steps are necessary before initiating a PowerFlex upgrade? (Choose two).
正解:A、C
解説:
Preparation is key to a safe upgrade.
* Back up the cluster configuration (Option C): Before making any changes, administrators should perform a backup of the MDM Cluster configuration. This creates a recovery point for the system's metadata (mappings, settings, user accounts) in case a catastrophic failure occurs during the upgrade.
* Verify node hardware compatibility (Option A): Administrators must ensure that the hardware (server model, CPU, NICs) and the current firmware levels are compatible with the new PowerFlex software version. Running the Health Check or Pre-Upgrade Validation tool will confirm if the nodes meet the strict requirements (HCL) for the target version.
Incorrect Options: Creating snapshots of all volumes (B) is not a system upgrade requirement (though good for data safety, it's not part of the upgrade procedure itself). Reconfiguring fault sets (D) is a structural change, not a pre-upgrade step.
質問 # 86
Which tasks are automated when configuring snapshots in PowerFlex? (Choose two).
正解:B、C
解説:
These tasks are handled by the Snapshot Policy feature in PowerFlex.
Scheduling snapshot creation (Option A): Administrators can define a policy (e.g., "Gold Policy") that triggers a snapshot every 15 minutes. Once applied to a volume, the system automates this trigger.
Managing snapshot retention policies (Option C): The policy also dictates the lifecycle of the snapshot. For example, "Keep 10 hourly snapshots and 5 daily snapshots." As new snapshots are created, the system automatically deletes the oldest ones to free up space and maintain the defined retention count.
質問 # 87
What steps are required to configure secure user accounts in PowerFlex? (Choose two).
正解:A、B
解説:
Securing access to the management interface is a critical step in the "Day 0" or "Day 1" configuration.
Integrate PowerFlex with LDAP (Option A): For enterprise environments, managing local users on every system is inefficient and insecure. PowerFlex supports integration with Lightweight Directory Access Protocol (LDAP) servers (like Active Directory). This allows administrators to centralize user management and map Active Directory groups to PowerFlex roles (e.g., Admin, Monitor).
Configure password policies (Option C): For local user accounts (which are necessary for emergency access if LDAP is down), PowerFlex allows the definition of strict password policies.
This includes setting requirements for password complexity (length, special characters), expiration intervals, and history (preventing reuse of old passwords).
質問 # 88
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