Pure Storage Updated FlashArray-Implementation-Specialist Exam Questions and Answers by scott

To performparallel evacuation of multiple SAS shelves, the FlashArray must be runningPurity//FA 6.0or higher.

Prior to Purity version 6.x, the shelf evacuation process (used during capacity consolidation or shelf retirement) was a serialized operation. An Implementation Engineer had to issue the evacuation command for one shelf, wait for all data to move to other storage within the array, and physically remove that shelf before starting the process for the next one. This could be time-consuming for large clusters of legacy SAS shelves.

With the release of Purity//FA 6.0, Pure Storage introduced significant enhancements to data mobility and background operational efficiency, including the ability to issue evacuation commands for multiple external shelves simultaneously. The system's intelligent scheduler manages the I/O bandwidth to ensure that the parallel data movement does not impact frontend host performance. While having sufficient free space (Option C) is logically necessary to hold the evacuated data, the specificfunctional capabilityto trigger concurrent evacuations is a software feature tied strictly to the Purity 6.x code base. Option B is irrelevant to the software capability of the array.

Monitoring the health and status of physical hardware components is a key task during upgrades and daily administration. While the FlashArray GUI provides a visual representation, the CLI offers granular detail.

To view the specific installation status, firmware version, and health of the NVRAM modules, the correct command ispurehw list --all.

purehw: This command suite is dedicated to reporting on the physical hardware components (fans, power supplies, temperature sensors, and NVRAM).

--all(or listing specific types) ensures that internal components like the NVRAM modules are displayed in the output.

The output will show the "Status" (e.g., ok, installing, updating), which is critical during a Purity upgrade or hardware replacement to confirm that the NVRAM firmware is being applied or that a new module has been successfully integrated.

puredrive list is strictly for the storage media (SSDs/DFMs), and purearray list shows high-level system info (name, ID, capacity) rather than component-level health.

=========

The correct action is torefer to the “Recommended DFS Versions for Purity Releases” Knowledge Base (KB) articleand, 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.

The upgrade from a FlashArray//XR4 to a FlashArray//XL is a specific "Data-in-Place" hardware migration that utilizes thepurewes(Pure Workflow Execution Service) utility to orchestrate complex steps. One of the most critical steps involves stopping the Purity software stack on the controller that is about to be removed (CT0) to ensure a clean failover and data flush to the surviving controller.

The correct command syntax ispurewes controller disable --purity --verify-mode secondary --verify-array ARRAY_NAME ct0.

purewes controller disable: Initiates the shutdown of the controller's services.

--purity: Specifies that the Purity software stack should be stopped (not just the hardware).

--verify-mode secondary: This is a crucial safety check. It ensures the commandonlyexecutes if CT0 is currently the Secondary controller. If CT0 were Primary, running this command without a failover first would cause an outage.

--verify-array: Confirms the action is being taken on the correct target array.

This command sequence ensures the controller is safely quiesced before the Implementation Engineer physically removes it from the chassis.

=========