FlashArray-Implementation-Specialist Exam Dumps - Pure Certified FlashArray Implementation Specialist (FAIS) Exam

The command pureboot list is the correct tool to verify which Purity version is designated to load upon the next system reboot.

FlashArray controllers maintain two boot partitions (often referred to as banks) for redundancy and upgrade safety. When an upgrade is performed, the new Purity software image is written to the inactive bank.

Verification: Running pureboot list displays the status of both boot banks (e.g., Primary and Secondary) and explicitly flags which version is "Running" and which is set for "Next Boot."

Why it's critical: Just checking the currently running version (using pureversion or purearray list) is insufficient during an upgrade workflow. An engineer must confirm that the boot pointer has successfully switched to the new version before issuing the reboot command. If pureboot list shows the old version as "Next Boot," a reboot would simply reload the current code, indicating the upgrade installation failed or wasn't finalized.

To safely stop the Purity operating environment on a specific controller during a physical controller upgrade (such as upgrading from FlashArray//X to //XL or performing a chassis swap), the correct command is pureadm stop .

This command is a system administration utility located in the Linux shell of the controller (accessible via the puresh prompt when logged into the specific controller's physical IP address). It is designed to stop the local Purity services on the node where the command is executed.

Procedure: In a non-disruptive controller upgrade, the engineer manually fails over primary services to the peer controller. Then, they log into the controller designated for removal (e.g., CT0) and run pureadm stop. This ensures that all Purity processes, I/O handling, and cache operations are cleanly terminated and flushed before the hardware is physically powered down or removed.

Syntax: The pureadm tool generally operates on the local instance. Options B and C utilize invalid flags (--secondary or --controller) for this specific command context. The engineer must be physically logged into the target controller to execute the stop command for that node.

When installing rails for a FlashArray in a rack requiring cage nuts (square hole racks that are not using the tool-less mechanism, or specific threaded adaptations), the correct placement for the cage nut is the top square of the lowest Rack Unit (RU) that the rail will occupy.

Pure Storage rail kits typically secure at the bottom of the targeted rack unit.

The "3-Hole" Rule: A standard Rack Unit (1U) consists of three vertical holes (often referred to as the bottom, middle, and top hole).

Alignment: The rail flange is designed to align such that the retaining screw or positioning stud engages specific holes to support the weight. For the standard securement point, the documentation specifies installing the cage nut in the top hole of the specific RU where the rail base sits (often the "lowest" RU if the device spans multiple U's, though the rail itself is 1U high).

Precision: Placing it in the "Lowest square of the lowest RU" (Option A) would interfere with the rail's shelf lip or the device below it. Correct alignment ensures the rail is level and the chassis slides in without binding.

In a Non-Disruptive Upgrade (NDU) scenario, the goal is to replace the compute and control logic of the array while preserving the existing data and minimizing hardware waste. When upgrading from a FlashArray//X70R2 to an //X70R4, the primary components that change are the Controllers themselves. The chassis, power supplies, and NVRAM modules (depending on the specific generation jump and health) can often be reused or are not the primary target of the replacement in a standard NDU kit.

If a complete array is shipped by mistake (often called a "greenfield" or "net-new" array shipment) instead of the specific upgrade kit, the engineer should only extract and use the Controllers from the new shipment. The existing chassis and its passive components (like the midplane and power supplies) are already racked, cabled, and functioning. Swapping the chassis or power supplies would turn the operation into a disruptive migration or a much more complex "chassis replacement" procedure, which is unnecessary for a controller upgrade.

Therefore, the engineer should unpack the new controllers, perform the NDU procedure to replace the old controllers one by one, and leave the rest of the new hardware (chassis, empty slots, etc.) as spare or return it. This approach adheres to the NDU procedure of swapping the "brains" of the storage while keeping the "body" (chassis and drives) intact.

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Upon verifying that a hardware upgrade is successfully completed and the system is stable, the command to remove the maintenance suppression is purealert untag --maintenance .

During upgrade activities, engineers often apply a "maintenance" tag or flag to the alert system to prevent the generation of "noise" (false positive alerts) that would otherwise be triggered by expected events like controller failovers, link downs, or path fluctuations. This suppression ensures that the customer and Pure Support are not flooded with critical tickets for planned work.

Once the work is done, it is critical to remove this suppression so the array resumes normal monitoring. The purealert command with the untag verb and the specific --maintenance flag is the correct syntax to clear this state. Options A and C use invalid syntax (--cancel or --unset) that is not recognized by the Purity CLI for this specific alert management function. Failing to run this command leaves the array in a state where genuine failures might be masked, violating the "Always-On" monitoring standard.

The FlashArray//XL platform features a split-chassis design with a unique PCIe bus layout compared to the standard //X series. To maintain optimal performance and redundancy, the backend connectivity for DirectFlash Shelves (DFS) must be balanced across the specific PCIe root complexes managed by the dual CPUs.

For a configuration involving multiple shelves (specifically targeting the logical shelf identifiers SH8 and SH9, which often correspond to the first pair of backend loops in an //XL deployment), the validated configuration is to use PCIe Slot 0 and PCIe Slot 6 . These slots are architecturally designated for the backend NVMe-oF (RoCE) fabric cards.

Using Slot 0 (typically located on the far left) and Slot 6 (located on the right side of the chassis) ensures that the I/O load is distributed across the internal midplane and CPUs correctly. Placing cards in incorrect slots (like Slot 1 or 7, which might be reserved for host I/O or inter-controller links) can result in shelf detection failures or performance bottlenecks where one CPU is overloaded with backend traffic while the other is idle.

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To specifically verify the shelf cable connections and validate the SAS topology during an installation, the correct command is storage_view.py config .

While standard Purity CLI commands like purehw list (Option B) can show the presence and general status of enclosures, they often do not provide the granular, low-level details of the SAS cabling map required to troubleshoot or verify physical redundancy paths (Side A vs. Side B connectivity).

storage_view.py is a specialized Python utility script included in the Purity operating system, primarily intended for use by Implementation Engineers and Support. Running storage_view.py config (or similar arguments like enclosures) outputs a visual or tabular representation of the backend cabling, explicitly showing how the controllers are chained to the expansion shelves. This allows the engineer to confirm that the cabling matches the strict "stacking" rules (e.g., verifying that the SAS loops are closed and redundant) and to identify issues like cross-cabling or disconnected paths that a simple "status=healthy" flag might miss during the initial build.

The upgrade from a FlashArray//X10 (or X20) to a FlashArray//X50 requires a mandatory power supply unit (PSU) upgrade .

While the FlashArray//X series utilizes a shared chassis design (3U) for models X10 through X90, the power requirements differ significantly between the entry-level and performance-tier controllers.

X10/X20: These models typically ship with 1000W or 1200W power supplies, which are sufficient for their lower-power CPUs and component loads.

X50/X70/X90: These "Performance" class arrays utilize higher-wattage Intel Xeon processors and often support denser NVMe configurations, necessitating 1600W power supplies to ensure stability and N+1 redundancy.

When a customer performs a Data-in-Place upgrade (swapping controllers) from an X10 to an X50, the existing chassis is retained, but the lower-capacity PSUs must be physically swapped for the high-capacity 1600W units to support the new X50 controllers. Conversely, upgrades like X50 > X70 (Option B) or R2 > R3 (Option C) typically occur within the same power tier, utilizing the existing 1600W PSUs.