FlashArray-Implementation-Specialist Exam Dumps - Pure Storage FAIS Questions and Answers

The correct action is to refer to the “Recommended DFS Versions for Purity Releases” Knowledge Base (KB) article and, if necessary, upgrade the Purity software on the FlashArray (which updates the DFS firmware).

Compatibility: DirectFlash Shelves (DFS) run specific firmware that must be compatible with the Purity operating system running on the array controllers. If a new shelf is shipped with very recent firmware, or an old shelf is added to a new array, there may be a mismatch.

Best Practice: The "Recommended DFS Versions" KB is the definitive source of truth. The engineer must verify if the shipped Purity version supports the specific hardware revision of the shelf.

Procedure: If an upgrade is required, the engineer updates Purity on the array. Since the DFS firmware is bundled within the Purity release, upgrading the array (Option A) effectively stages the update for the shelf. Once the shelf is attached (or if attached during the upgrade), Purity automatically applies the correct firmware to the DFS modules. Skipping this check (Option B) or blindly upgrading without cross-referencing the KB (Option C) risks connectivity issues or unrecognized capacity.

During a hardware upgrade, software update, or initial deployment, FlashArray controllers are frequently rebooted. When a controller comes back online, the underlying Linux kernel boots first, followed by the proprietary Purity//FA operating system services. It is an essential responsibility of the Implementation Engineer to verify that the controller has not just powered on, but has successfully loaded its storage processes and rejoined the high-availability cluster.

The definitive Purity CLI command used to validate this state is pureadm list .

Executing pureadm list outputs a clear, tabular view of the array's cluster topology. It displays the hostname of both controllers (CT0 and CT1) and explicitly lists their current operational state.

A healthy cluster will show one controller in the "Primary" state (actively handling backend drive negotiations and primary administrative duties) and the other in the "Ready" / "Secondary" state.

If a controller has rebooted but the Purity services have not fully started, or if it is struggling to synchronize its NVRAM mirror with the primary node, pureadm list will flag that controller's status as "Offline," "Updating," or "Not Responding."

Options like pureadm status or purecluster status are fabricated syntaxes. The standard, unmodified pureadm list command is the documented best practice for verifying that Purity services have cleanly initialized and High Availability (HA) is restored.

To expand a FlashArray//X10 from a 5/5 (fully populated chassis with two 5TB equivalent packs) to an 11/11 (two 11TB equivalent packs) configuration, the correct action is to install a swing shelf with loan capacity .

The Constraint: The "5/5" notation implies the chassis slots are already occupied by the existing media. Since the customer is replacing the existing packs with larger ones (Capacity Consolidation) rather than just adding new ones, the engineer needs a place to put the data during the swap.

Why Swing Shelf: The FlashArray//X10 chassis has limited slots. You cannot simply pull a pack (Option A) if the remaining pack doesn't have enough free space to hold all the data (which is typical in upgrade scenarios). A Swing Shelf (temporary external SAS or NVMe shelf provided by Pure) is attached to the array. The data is evacuated from the internal drives to this shelf. Once the internal slots are empty, the new 11TB packs are installed. The data is then moved back from the shelf to the new packs, and the shelf is removed.

To view the currently configured Network Time Protocol (NTP) servers on a FlashArray, the correct command is purearray list --ntpserver .

Command Hierarchy: While NTP is a networking function, in the Purity CLI object model, time synchronization is considered a global array attribute rather than a specific interface setting. Therefore, it falls under the purearray command namespace.

Usage: Running purearray list --ntpserver returns a list of the IP addresses or FQDNs of the time servers the array is currently using to sync its system clock.

Invalid Options:

purenetwork list (Option B) displays IP interface configurations (IPs, subnets, gateways) but does not list service-level pointers like NTP.

puredns list (Option A) is strictly for DNS nameservers and suffix configurations.

Importance: Verifying NTP is critical for log timestamp accuracy, ActiveCluster mediation, and Kerberos authentication.

The Customer is the mandatory party required to provide completion sign-off before the Implementation Engineer leaves the site.

According to the FlashArray Implementation Service Brief and standard operating procedures, the final step of the deployment phase is the "Project Sign-off." After the engineer has racked, cabled, initialized, and verified the array's health (often demonstrating connectivity and the Purity GUI), the customer must formally acknowledge that the installation meets the agreed-upon scope of work. This sign-off serves as the legal and operational acceptance of the hardware and software implementation.

While the Account Team manages the commercial relationship and Support may assist with technical hurdles, neither can validate that the physical implementation meets the customer's specific on-site requirements or that the "handover" of administration has occurred. The customer's signature (physical or digital) on the implementation checklist or service completion form signals the transition from the "Deployment" phase to the "Production/Support" phase.

The FlashArray//X20 R4 operates with a minimum AC voltage input of approximately 90 VAC .

The FlashArray//X series (specifically the entry-to-mid-range models like the X10, X20, and X50) utilizes high-efficiency Power Supply Units (PSUs) designed with auto-ranging capabilities. These PSUs conform to standard global power infrastructure requirements, supporting a nominal input range of 100V to 240V AC (50/60 Hz).

Low-Line Support: Because the X20 is an entry-level enterprise array often deployed in diverse environments (including edge locations or standard office server rooms), it fully supports "low-line" power (100-120V nominal). The technical minimum tolerance for these power supplies typically extends down to 90 VAC to account for voltage sags or fluctuations.

Contrast with High-End: Larger, higher-density systems like the FlashArray//XL or fully loaded high-performance chassis configurations often require "high-line" power (200V-240V) to deliver sufficient wattage efficiently. However, the X20 R4 does not have this restriction. Therefore, Option A (90V) represents the correct minimum floor, whereas Options B and C represent high-line voltages that are supported but not required for minimum operation.

Pure Fusion is an API-driven, cloud-based control plane designed to bring cloud operating models to on-premises enterprise storage. It allows organizations to pool multiple Pure Storage FlashArrays into dynamic "fleets," provisioning storage across them based on workload policies rather than managing individual arrays manually. When an Implementation Engineer is tasked with adding a new or existing FlashArray into a Fusion fleet, the array must meet several baseline prerequisites: it must be operating in a healthy state, it must be running a supported and modern version of the Purity//FA operating system, and it must maintain a stable outbound connection to the Pure1 cloud platform for telemetry and management signaling.

If all these baseline health and connectivity checks are verified, yet the engineer receives an outright rejection or error during the Fusion addition process, the most common and likely root cause is an administrative conflict: the array is already assigned to another Fusion fleet . By architectural design, a single FlashArray operates as an exclusive endpoint and can only be tethered to one Fusion fleet at any given time. It cannot be shared or co-managed across multiple distinct fleets simultaneously. To resolve this issue, the engineer or customer must identify the previous fleet claiming the array, explicitly unassign or remove it from that control plane, and then reinitiate the pairing process for the newly intended fleet.

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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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.

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.