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

To specifically verify theshelf cable connectionsand validate the SAS topology during an installation, the correct command isstorage_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.

When performing a standard installation on a FlashArray, the first logical configuration step is theCT0 configuration(typically via the puresetup utility on the primary controller).

Workflow:After the physical rack-and-stack, cabling, and power-on, the Implementation Engineer must establish a management connection to the array. This is done by connecting to the serial console or the default IP ofController 0 (CT0).

Initialization:The puresetup process on CT0 initializes the system, sets the management IP addresses (VIP, CT0, CT1), and configures the gateway/DNS. This step effectively "builds" the array cluster.

Why not C?While ensuring the array is on the target code version is critical, a "Code Upgrade" is typically performedafterthe array is initialized and network-accessible (or via the Pure1 SSU workflow). The only exception is a manual USB re-image for a factory reset, but the standard installation procedure definesConfiguration/Initializationas the primary step to bring the system online. Configuration of CT1 (Option B) happens automatically as part of the cluster creation initiated from CT0.

FlashArray models differ in their NVRAM requirements based on their performance tier and throughput capabilities. Lower and mid-range models (like the //X10, //X20, and //X50) typically operate with two NVRAM modules installed in slots 0 and 1. However, high-performance models (like the //X70 and //X90) require double the NVRAM buffer to handle the increased write I/O bandwidth, necessitating four NVRAM modules (populating slots 0, 1, 2, and 3).

When performing aData-in-Place Upgrade (NDU) from a FlashArray//X50R3 to a FlashArray//X70R4, the chassis remains (or is upgraded in a way that preserves data), but the new controller configuration shifts from a "2-NVRAM" requirement to a "4-NVRAM" requirement. Therefore, as part of the physical upgrade procedure, the Implementation Engineer must install twoadditional NVRAM modulesinto slots 2 and 3 of the chassis to support the new //X70 controllers.

If these modules are not added, the new //X70 controllers will detect an "insufficient hardware" condition and fail to boot or initialize the Purity software properly. This step is unique to upgrades crossing the boundary between mid-range and high-end models.

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The FlashArray//XL series (specifically the //XLR5 in this context) utilizes a 100 Gigabit Ethernet-based back-end fabric to communicate with DirectFlash Shelves (DFS). This connection relies on the RoCE (RDMA over Converged Ethernet) protocol to ensure low-latency access to the external NVMe modules.

The specific PCIe interface card validated for this connectivity is often labeled in the Bill of Materials (BOM) or configuration guides as the2-Port 100GbE iSCSI/RoCEcard (or simply the 100GbE Ethernet/RoCE card depending on the specific firmware/labeling revision). Crucially, it must be a100GbEcapability card.

The //XL platform standardized on 100GbE for its shelf interconnects, moving away from the 50GbE used in some previous generations of the //X series. The 200GbE cards are typically reserved for high-speed host connectivity or clustering, not the standard shelf loop. Therefore, ensuring the BOM includes the correct 100GbE RoCE-capable cards is essential for successful shelf detection and operation during installation.