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

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 the 2-Port 100GbE iSCSI/RoCE card (or simply the 100GbE Ethernet/RoCE card depending on the specific firmware/labeling revision). Crucially, it must be a 100GbE capability 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.

During a Hardware Non-Disruptive Upgrade (HWNDU), such as a controller swap, ensuring that the frontend host multi-pathing is perfectly healthy before taking a node offline is the single most critical safety check. If an Implementation Engineer initiates a failover while host I/O is unbalanced or single-pathed, it will cause an immediate All-Paths-Down (APD) event and crash the customer's applications.

While standard commands like pureport list --initiator are excellent for verifying that the physical fibre channel or iSCSI links are logged in, they do not confirm that data is actively flowing across them. To truly validate I/O health and multipath distribution, the engineer must run the purehost monitor --balance command.

This specialized CLI tool forces the FlashArray to take a brief, active sample of incoming read and write commands (defaulting to a 5-second interval) across all host initiators. It calculates the traffic distribution and displays the relative percentage of I/Os for each initiator path. A well-balanced, healthy host utilizing proper MPIO policies (like VMware's Round Robin) will show traffic evenly distributed across all available paths within a few percentage points. If the output reveals that 100% of the traffic is pinned to a single controller's port, the engineer immediately knows there is a zoning or host-side MPIO misconfiguration that must be resolved before proceeding with the upgrade.

During the initialization phase of a new Pure Storage FlashArray, the Implementation Engineer executes the puresetup newarray (or puresetup array) command via a local serial console connection. This interactive script prompts the engineer for foundational network parameters, including the management IP addresses (vir0, eth0, eth1), subnet mask, default gateway, DNS servers, and NTP servers.

By default, the puresetup utility contains built-in safety mechanisms. As soon as the IP parameters are entered, the script actively attempts to ping the provided default gateway, resolve external hostnames via the provided DNS servers, and synchronize time with the NTP targets. If the customer's top-of-rack (ToR) switches are not yet configured, the cables are unpatched, or the array is being pre-staged in a lab completely isolated from the production network, these validation tests will inevitably fail, causing the setup script to hang or reject the configuration.

To intentionally bypass this validation and force the array to accept the network parameters without testing them, the Implementation Engineer must append the --skip-network-tests flag to the setup command. Executing puresetup newarray --skip-network-tests allows the system to save the configuration to the internal database and logically initialize the cluster. The array will bring the management interfaces online locally, allowing the engineer to connect via the GUI or SSH as soon as the physical network is eventually plugged in and routed.

The pureinstall command is a low-level Purity operating system utility used strictly by Implementation Engineers and Pure Storage Support to install or upgrade the Purity//FA image on a controller's boot drive before the array is logically initialized.

When an Implementation Engineer unpacks a new FlashArray, the controllers may ship with a factory default version of Purity. If the customer's deployment requires a specific target version of Purity//FA (e.g., to match a fleet standard or enable a new feature), the engineer must boot into the controller via the local KVM/Serial connection and log in as the puresetup user. From here, they mount a USB drive containing the .ppkg firmware file and execute pureinstall purity- < version > .ppkg.

This process writes the new Purity operating system to the alternate boot partition. After executing pureinstall and rebooting the controller to boot from the new partition, the engineer then runs the puresetup newarray command (or puresetup secondary on the peer controller) to logically initialize the array, assign management IP addresses, and set the array name. Therefore, pureinstall must always be run prior to initialization.

On the FlashArray//XL , the designated PCIe slots for DirectFlash Shelf (DFS) connectivity are Slot 0 and Slot 6 .

The FlashArray//XL features a high-density, high-performance architecture that utilizes 100GbE RoCE (RDMA over Converged Ethernet) for backend connectivity to expansion shelves, replacing the SAS protocols used in previous generations.

Slot Assignment: To ensure maximum throughput and redundancy, these backend I/O modules must be balanced across the controller's PCIe bus. The hardware guide and slot map for the //XL explicitly assign Slot 0 (typically on the lower riser) and Slot 6 (on the upper riser) for the installation of the 2-port 100GbE NVMe-oF cards used to connect DirectFlash Shelves.

Configuration: If a customer orders a FlashArray//XL with external capacity, these cards will be pre-installed or must be seated in these specific slots by the engineer. Using other slots (like 1 or 7, which are often reserved for host I/O or other expansion cards) would result in an invalid configuration or lack of connectivity to the backend storage media.