Authentic Pure Storage Certification Exam FlashArray-Implementation-Specialist Questions Answers

When dealing with power architecture on high-end arrays like the FlashArray//X90 R4, understanding the difference between the base chassis and the expansion shelves is critical. The base //X90 chassis—housing the powerful Intel CPUs, massive memory footprint, and primary PCIe lanes—draws significant wattage and strictly requires 200V-240V (208V minimum) power inputs to function. It will literally not power on if plugged into a 120V circuit.

However, a DirectFlash Shelf (DFS) is merely an external NVMe-oF expansion enclosure. It houses the DirectFlash Modules (DFMs) and the necessary backend I/O modules, but completely lacks the compute-heavy controllers of the main array. Because its overall power draw is significantly lower, the official Pure Storage hardware specifications state that DirectFlash Shelves are fully rated and completely supported to run on standard 120 VAC power indefinitely.

Therefore, the Implementation Engineer can confidently cable the DFS power supplies into the available 120V PDU connections without sacrificing any performance, redundancy, or hardware lifespan. It is a fully supported, permanent configuration.

The FlashArray//E connects to its DirectFlash Shelves (DFS) using 25Gb Ethernet (RoCE) .

The FlashArray//E is the "Capacity Optimized" member of the FlashArray family, designed to replace spinning disk repositories with all-flash efficiency. While the high-performance FlashArray//XL utilizes 100GbE for its backend NVMe-oF connectivity to maximize throughput for mission-critical databases, the //E prioritizes cost-efficiency, density, and power consumption.

Architecture: To maintain this efficiency balance, the backend connectivity for expansion shelves on the //E platform is standardized on 25GbE . This provides ample bandwidth for the QLC-based workloads (typically unstructured data, repository, or Tier 2 block) without the higher cost and power draw of 100GbE optics and controllers.

Comparison: Option A (40G) is a legacy QSFP standard not used in modern Pure backend designs. Option C (100G) is reserved for the performance-tier //XL and high-end //X models.

FlashArrays require outbound HTTPS connectivity to reach Pure1 for log uploads, phone home, and remote assist. In many enterprise environments, direct internet access is blocked, and traffic must be routed through an HTTP/HTTPS proxy.

To configure this setting in Purity via the CLI, the correct command is purearray setattr --proxy followed by the full proxy URL (including protocol and port). The setattr (set attribute) subcommand is the standard method for modifying array-wide configuration parameters like the array name, idle timeout, and proxy settings. The other command variations (puresetup proxy or purearray configure) are incorrect syntax for this specific operation. This configuration is often a critical step during the "Pre-Flight" or initial setup phase to ensure the array can "phone home" immediately upon deployment.

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