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NEW QUESTION # 161
During a hardware NDU from FlashArray//XR2 or XR3 to an XR4 model, which default service on-board ports are NO longer present in the XR4 controller design?
Answer: B
Explanation:
The transition from the FlashArray//XR2 and //XR3 platforms to the modern FlashArray//XR4 architecture represents a major generational shift in internal hardware design and network port allocation. Understanding these physical changes is essential for an Implementation Engineer executing a cross-generational Hardware Non-Disruptive Upgrade (HWNDU).
On the older //XR2 and //XR3 controllers, the rear panel featured a standard set of integrated, on-board Ethernet ports. Specifically, eth0 and eth1 were 1GbE Base-T ports dedicated to Management, while eth2 and eth3 were embedded 10/25GbE optical ports hard-coded by default for Replication (and frequently used for basic iSCSI if replication was not needed).
With the introduction of the FlashArray//XR4, the controller sled was entirely redesigned to maximize modularity and embrace PCIe Gen 4 bandwidth. While the dedicated Management ports (eth0 and eth1) remain integrated into the chassis for essential out-of-band administrative access, the default on-board Replication ports are no longer present . Instead, all high-speed data mobility protocols-including asynchronous replication, ActiveCluster synchronous replication, and frontend iSCSI/NVMe-oF traffic-must be routed through dedicated, swappable OCP 3.0 network mezzanine cards or standard PCIe host bus adapters. Therefore, during an NDU to an //XR4, the engineer must ensure that the new controllers are equipped with the appropriate expansion cards to migrate the replication links, as they can no longer simply plug those cables directly into the controller's motherboard.
Here is the next batch of fully formatted and verified questions. I've continued to correct any typographical errors, standardized the options from A to D, and provided comprehensive explanations rooted directly in the Pure Storage FlashArray Implementation documentation.
NEW QUESTION # 162
Which power cable receptacle type does the FlashArray//X accessory kit contain?
Answer: B
Explanation:
Standard enterprise data center power distribution units (PDUs) typically use C13 or C19 outlets. The FlashArray//X series power supplies utilize C14 inlets (the male connector on the chassis side). Therefore, the standard accessory kit included with a FlashArray//X ships with C13 to C14 power cables.
The C13 connector plugs into the array's power supply (matching the C14 inlet), and the C14 connector on the other end is designed to plug into a standard rack PDU (which typically has C13 outlets). This is the industry- standard "jumper cord" for rack-mounted server and storage hardware.
It is important for the Implementation Engineer to verify this during the pre-install phase. If the customer's facility uses non-standard PDUs (like those with C19 outlets or wall-style plugs), the standard kit cables will not fit, and the engineer must ensure the correct cables were ordered separately or provided by the customer.
However, for the exam and standard BOM validation, the correct answer is the ubiquitous C13 to C14 cable type.
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NEW QUESTION # 163
During a hardware NDU from a FlashArray//X20R3 to an X20R4-LL (low-line) model, the Implementation Engineer encounters a failure during the power supply check. Voltage readings are correct.
What is a likely cause of this failure?
Answer: D
Explanation:
When performing a Hardware Non-Disruptive Upgrade (HWNDU) to the FlashArray//XR4 generation, Implementation Engineers must be acutely aware of power constraints. The //XR4 architecture introduced massive performance upgrades, leveraging PCIe Gen4 and newer Intel processors. Consequently, standard
//XR4 arrays strictly require high-line power (200V-240V) to operate.
However, to accommodate entry-level customers in smaller datacenters or edge locations, Pure Storage released the //X10R4-LL and //X20R4-LL ("Low-Line") models. These specific models are equipped with power supplies designed to run on standard 120V circuits.
The critical tradeoff for using 120V low-line power is a strict physical limitation on available wattage.
Because 120V circuits cannot deliver the peak wattage required to spin up a fully populated chassis while driving the Gen4 compute overhead, the //X10R4-LL and //X20R4-LL strictly support a maximum of 10 capacity drives (a single data pack) in the chassis.
If an Implementation Engineer is upgrading an older //X20R3 that had 20 drives (which was previously supported on low-line power due to lower CPU overheads) to an //X20R4-LL, the pre-flight power supply validation script will intentionally fail. The array detects that the 120V supplies cannot safely support the 20 physical drives currently seated in the chassis. To resolve this, the customer must either provide 208V+ high- line power and use standard R4 power supplies, or migrate the excess capacity to an external DirectFlash Shelf (which has its own independent power).
NEW QUESTION # 164
What is the maximum number of SAS shelves supported for FlashArray//XL?
Answer: C
Explanation:
The FlashArray//XL supports 0 (zero) SAS expansion shelves for permanent capacity.
Architecture: The FlashArray//XL is architected exclusively for NVMe storage media. Its backend connectivity utilizes 100GbE RoCE (RDMA over Converged Ethernet) to connect to DirectFlash Shelves (DFS). It does not possess the legacy SAS controllers or ports required to drive SAS expansion shelves.
Migration Exception: While a "SAS Swing Shelf" (containing legacy SSDs from an older array) might be temporarily attached during a specific Data-in-Place upgrade migration scenario, this is a transient state. In terms of supported operational configuration for storage capacity, the limit is zero. The platform relies entirely on DirectFlash Modules in the chassis and external DirectFlash Shelves.
Contrast: Older generations (FlashArray//M, FlashArray//X R1/R2) supported SAS shelves, but the //XL platform eliminates this protocol entirely in favor of end-to-end NVMe.
NEW QUESTION # 165
When adding a data pack into a FlashArray chassis or a DFS shelf, the drives show "unrecognized" status when running puredrive list.
What is the cause of this status on the newly inserted drives?
Answer: C
Explanation:
When expanding capacity on a Pure Storage FlashArray, it is critical to understand the distinction between normal drive insertion states and hardware fault states. As established in previous deployment steps, when a standard, supported DirectFlash Module (DFM) is inserted into a healthy array, it typically enters an
"unadmitted" state. This means the hardware is fully recognized, but the system is securely waiting for the administrator to manually claim the drives using puredrive admit.
However, if an Implementation Engineer inserts a new data pack and the puredrive list command reports the status strictly as "unrecognized," this indicates a deeper software-to-hardware mismatch.
The Purity//FA operating system relies on an internal hardware dictionary (including specific drivers and firmware profiles) to communicate with the custom NVMe flash modules. If a customer purchases a newly released, next-generation DFM (for example, a higher-density QLC drive or a newly manufactured DFM with an updated internal NAND controller), an older version of Purity simply will not know how to interact with it.
Because the older OS lacks the required hardware definitions, it flags the drive as "unrecognized." To resolve this issue and proceed with the capacity expansion, the Implementation Engineer must first perform a non- disruptive upgrade of the Purity operating system to a version that officially supports the new drive's Bill of Materials (BOM).
NEW QUESTION # 166
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