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| Section | Objectives |
|---|---|
| Topic 1: FlashArray Architecture and Core Concepts | - FlashArray hardware and architecture overview
|
| Topic 2: Data Protection and Availability | - Replication
|
| Topic 3: Installation and Initial Configuration | - Host connectivity
|
| Topic 4: Monitoring, Performance, and Troubleshooting | - System monitoring
|
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NEW QUESTION # 167
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?
Answer: B
Explanation:
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.
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NEW QUESTION # 168
A FlashArray arrives with Purity 5.3.8 applied out of the factory. The account team requests that the array be configured with Purity 6.1.21. Which steps should the Implementation Engineer select to meet this requirement?
Answer: A
Explanation:
To meet the requirement of deploying a specific, newer Purity version (6.1.21) on a factory-fresh array that arrived with older code (5.3.8), the most efficient and correct procedure for an Implementation Engineer is to create a bootable USB stick with the target 6.1.21 ISO and reimage the controllers.
The "Factory Reset" or re-imaging process is a supported method for initial installation when the desired software baseline differs significantly from what is pre-loaded. Since the array contains no customer data yet, re-imaging is non-destructive to business operations and avoids the time-consuming process of initializing the array on old code, registering it, and then performing a multi-step software upgrade (Option C).
Procedure: The engineer downloads the specific Purity ISO from the Pure Storage Support portal, uses a tool like Rufus or Etcher (or the pureinstall utility) to create the bootable media, and boots the controllers from this USB to lay down the fresh image.
Option B is incorrect because copying .ppkg files is part of an online upgrade workflow for running systems, not a re-imaging process for a raw box.
NEW QUESTION # 169
Which FlashArray//XL DirectMemory Modules (DMMs) configuration condition is true?
Answer: C
Explanation:
FlashArray//XL architectures offer the ability to leverage DirectMemory Modules (DMMs) to drastically accelerate read-intensive workloads. DMMs are specialized drives built on Storage Class Memory (SCM) technologies, such as Intel Optane. They act as a high-speed read cache tier, sitting seamlessly between the array's ultra-fast NVRAM (which handles incoming writes) and the standard DirectFlash Modules (which provide the bulk capacity).
Because the entire purpose of a DirectMemory Module is to provide the absolute lowest read latency possible, physical proximity to the controller's CPUs and direct access to internal PCIe lanes is mandatory. Therefore, DMMs must be installed directly into the primary FlashArray chassis in specifically designated slots.
Installing DMMs into an external DirectFlash Shelf (DFS) is strictly prohibited and physically unsupported.
Routing read-cache traffic across an external NVMe-oF (RoCE) backend fabric-even at 100GbE speeds- would introduce microsecond latency overheads that completely defeat the performance benefits of Storage Class Memory. Furthermore, DMMs share the exact same physical U.2/NVMe drive slot form factor as standard capacity DFMs (making Option C false), and they are supported across multiple array models beyond just the //XL 170 (making Option B false). An Implementation Engineer must strictly validate the chassis population rules before inserting DMMs to ensure the system recognizes the cache tier correctly upon initialization.
NEW QUESTION # 170
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: C
Explanation:
The FlashArray//X20R4-LL (Low-Line) model is a specific configuration designed for lower capacity and power entry points. Unlike the standard //X or //XL models which can support fully populated chassis and shelves, the "Low-Line" configurations often come with strict hardware limitations regarding power draw and drive count. A known constraint for specific Low-Line chassis upgrades, particularly when moving to the X20R4-LL, is a limitation on the number of DirectFlash Modules (drives) supported due to the power supply unit (PSU) capacity or thermal design targeted for that specific SKU.
In this scenario, if the source array (X20R3) was populated with more drives than the target X20R4-LL supports-specifically more than 10 drives-the upgrade validation checks (such as those performed by the upgrade script or Purity health checks) will flag a failure. Even though the voltage readings are technically correct (indicating the PDUs are providing power), the check fails because the hardware configuration exceeds the supported power budget for that specific chassis model.
Implementation Engineers must verify the drive count of the source array against the specifications of the target "Low-Line" array during the planning phase. If the source array has 11 or more drives, the target hardware cannot be an LL model; it would require a standard model to support the additional power load of the extra drives. This check prevents the array from booting into a state where it might experience power contention or thermal shutdown under load.
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NEW QUESTION # 171
An Implementation Engineer runs check start validate-array-health before starting a FlashArray//X70R3 to FlashArray//X70R5 HWNDU and receives code 60 alert indicating an unhealthy NVRAM module in CH0.NVB1. What action Should the Implementation Engineer take to resolve this?
Answer: A
Explanation:
Hardware Non-Disruptive Upgrades (HWNDU) rely strictly on the array being in a fully healthy state before the process begins. The validate-array-health check is designed to gate the upgrade if any component that provides redundancy or data integrity is compromised. NVRAM (Non-Volatile Random Access Memory) modules are critical components in the FlashArray architecture; they store in-flight write data to ensure it is persistent before being destaged to flash.
A "Code 60" alert specifically points to a hardware issue with an NVRAM module. While the //X70 model indeed has redundancy (often using multiple NVRAM modules), proceeding with an upgrade while one is degraded puts the array at risk. During an NDU, controllers reboot and failover; running on reduced redundancy during these critical operations is not supported and is blocked by the health checks.
The correct first step for an Implementation Engineer is to attempt to reseat the unhealthy NVRAM module. Often, connection issues or transient seating faults can trigger these alerts. After reseating, the engineer must run the health check again to confirm the module status has returned to "healthy." If the module remains unhealthy after reseating, it must be replaced before the upgrade can proceed. You cannot simply disable it or ignore it, as the upgrade script will likely refuse to continue to protect data integrity.
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NEW QUESTION # 172
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