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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Upgrades | 32% | - Firmware and component updates - Controller and shelf upgrades - Purity version interoperability - Non-disruptive upgrades (NDU) |
| Topic 2: Post-Installation / Post-Upgrade | 20% | - Troubleshooting and issue resolution - Configuration optimization - Validation and verification procedures |
| Topic 3: Installation | 23% | - Network and storage setup - System initialization and configuration - Physical installation procedures |
| Topic 4: Pre-Installation / Pre-Upgrade | 25% | - Environment and configuration prerequisites - Planning and preparation steps - Hardware and software compatibility verification |
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質問 # 31
Which user does an Implementation Engineer use when preparing for the Purity upgrade to complete a HWNDU?
正解：D
解説：
Executing a Hardware Non-Disruptive Upgrade (HWNDU) is one of the most delicate procedures an Implementation Engineer performs. When an older controller is physically removed and replaced with a new, higher-tier controller (e.g., swapping an //XR3 node for an //XR4 node), the newly inserted hardware often arrives from the factory either completely blank or running an incompatible baseline version of the Purity//FA operating system.
Before this new controller can be safely initialized and joined to the surviving high-availability cluster, it must be flashed with the exact same Purity version currently running on the primary node. Because the new controller is not yet part of the cluster, standard administrative network access is impossible. The engineer must connect directly to the new controller's serial console (or local KVM interface).
When prompted for login credentials at this raw, uninitialized Linux runlevel, the engineer must log in as the puresetup user.
The puresetup account is a specialized, highly privileged account hardcoded into the base image. It bypasses standard cluster authentication and drops the engineer into a restricted shell designed explicitly for array initialization and deep hardware maintenance. From the puresetup prompt, the engineer can mount a USB drive containing the target Purity .ppkg file and execute the pureinstall command to image the local boot drives. Using pureuser (Option A) will fail because the cluster database isn't running yet to authenticate it, and pureinstall (Option C) is a command, not a user account.
Here is the final batch of your fully formatted and verified questions. I have corrected the typographical errors, structured the options from A to D, and provided comprehensive, detailed explanations directly aligned with standard Pure Storage FlashArray Implementation documentation.
質問 # 32
An Implementation Engineer is performing an inventory for an NDU from a FlashArray//X70R2 to a FlashArray//X70R4 and discovers that a complete FlashArray//X70R4 was shipped instead of an NDU kit.
What is the minimum hardware the Implementation Engineer should use from the new array to complete the NDU?
正解：A
解説：
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.
=========
質問 # 33
What is the minimum AC voltage required to operate a FlashArray//X20R4 array?
正解：B
解説：
The FlashArray//X20 R4 operates with a minimum AC voltage input of approximately 90 VAC.
The FlashArray//X series (specifically the entry-to-mid-range models like the X10, X20, and X50) utilizes high-efficiency Power Supply Units (PSUs) designed with auto-ranging capabilities. These PSUs conform to standard global power infrastructure requirements, supporting a nominal input range of 100V to 240V AC (50/60 Hz).
Low-Line Support: Because the X20 is an entry-level enterprise array often deployed in diverse environments (including edge locations or standard office server rooms), it fully supports "low-line" power (100-120V nominal). The technical minimum tolerance for these power supplies typically extends down to 90 VAC to account for voltage sags or fluctuations.
Contrast with High-End: Larger, higher-density systems like the FlashArray//XL or fully loaded high-performance chassis configurations often require "high-line" power (200V-240V) to deliver sufficient wattage efficiently. However, the X20 R4 does not have this restriction. Therefore, Option A (90V) represents the correct minimum floor, whereas Options B and C represent high-line voltages that are supported but not required for minimum operation.
質問 # 34
An Implementation Engineer is assigned to install a 4X Module 9.1 TB Conversion Kit in a Flash Array Chassis. Why are there only four Direct Flash Modules?
正解：A
解説：
A "4X Module" kit is specifically designed to widen an existing write group (RAID set).
Write Group Geometry: In standard FlashArray//X configurations, DirectFlash Modules (DFMs) operate in "Write Groups" (typically 10 modules wide for a standard data pack). However, to offer more flexible entry points or capacity expansion options, Pure Storage allows configurations that start with smaller write groups (e.g., 6 modules).
Widening: When a customer wants to expand capacity or performance on these smaller configurations without adding a full new 10-pack, they can purchase a widening kit (in this case, 4 modules).
Process: The Implementation Engineer installs these 4 modules into the empty slots. The Purity operating system then logically integrates these new drives into the existing narrow write group, "widening" it to the standard width (e.g., 6 + 4 = 10). This operation redistributes parity and data across the full set of 10 drives, improving performance and efficiency.
質問 # 35
An Implementation Engineer attempts to add a FlashArray to a Fusion fleet but receives an error indicating the array cannot be added. The array appears healthy and is connected to Pure1.
What is the most likely cause of this issue?
正解：B
解説：
Pure Fusion is an API-driven, cloud-based control plane designed to bring cloud operating models to on- premises enterprise storage. It allows organizations to pool multiple Pure Storage FlashArrays into dynamic
"fleets," provisioning storage across them based on workload policies rather than managing individual arrays manually. When an Implementation Engineer is tasked with adding a new or existing FlashArray into a Fusion fleet, the array must meet several baseline prerequisites: it must be operating in a healthy state, it must be running a supported and modern version of the Purity//FA operating system, and it must maintain a stable outbound connection to the Pure1 cloud platform for telemetry and management signaling.
If all these baseline health and connectivity checks are verified, yet the engineer receives an outright rejection or error during the Fusion addition process, the most common and likely root cause is an administrative conflict: the array is already assigned to another Fusion fleet . By architectural design, a single FlashArray operates as an exclusive endpoint and can only be tethered to one Fusion fleet at any given time. It cannot be shared or co-managed across multiple distinct fleets simultaneously. To resolve this issue, the engineer or customer must identify the previous fleet claiming the array, explicitly unassign or remove it from that control plane, and then reinitiate the pairing process for the newly intended fleet.
質問 # 36
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