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NEW QUESTION # 20
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: A
Explanation:
In the architectural evolution from FlashArray//XR2 and //XR3 to the FlashArray//XR4, Pure Storage made significant changes to the controller's rear panel and I/O design to accommodate higher performance and PCIe Gen 4 capabilities. One of the most critical changes for an Implementation Engineer to plan for during a hardware Non-Disruptive Upgrade (NDU) is the removal of the onboard, default iSCSI ports that were present on previous generations.
On //XR2 and //XR3 controllers, there were onboard Ethernet ports often used for iSCSI host connectivity without requiring a discrete PCIe adapter. However, the //XR4 controller design removes these dedicated onboard iSCSI ports to streamline the motherboard design and shift host I/O strictly to PCIe add-in cards. The //XR4 retains onboard ports specifically for Management (Mgmt) and Replication connectivity, ensuring that administrative access and array-to-array replication can still be maintained without additional hardware.
Consequently, if a customer was relying solely on the onboard ports for iSCSI traffic on their legacy //XR2 or //XR3, the Bill of Materials (BOM) for the upgrade to //XR4 must include discrete Ethernet/iSCSI PCIe cards to migrate those connections. Failure to identify this architectural difference during the pre-upgrade inventory can result in a loss of host connectivity or an inability to cable the new controllers correctly, as the expected physical ports simply will not exist on the new chassis.
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NEW QUESTION # 21
If a Technical Support Engineer (TSE) is not available to perform health checks after an installation, what action should the Implementation Engineer take?
Answer: C
Explanation:
If a Pure Storage Technical Support Engineer (TSE) is unavailable to immediately perform the remote health checks upon the completion of the physical installation, the correct procedure is to verify that Remote Assist (RA) is enabled and update the support case with this information.
Standard operating procedure dictates that the Implementation Engineer must not close the install case until the array has been health-checked and verified by Support. Closing the case (Option B) would signal that the work is complete when the critical validation step is missing, potentially leaving the customer with an unverified system. Emailing the account team (Option A) is helpful for visibility but does not advance the technical workflow required to close the loop.
By confirming RA is open (using purearray remoteassist) and documenting the active session port in the case notes, the Implementation Engineer enables the Support team to perform the health checks asynchronously as soon as a TSE becomes available. This ensures the "handshake" between the onsite engineer and the remote support team is maintained without delaying the engineer's departure from the site, while guaranteeing the array will be validated before final sign-off.
NEW QUESTION # 22
An Implementation Engineer performs a controller upgrade. What command should the Implementation Engineer run to check I/O health?
Answer: C
Explanation:
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.
NEW QUESTION # 23
What is the minimum AC voltage required to operate a FlashArray//X20R4 array?
Answer: B
Explanation:
The FlashArray//X20R4 requires a minimum AC input voltage of 180V to operate. This ensures stable power delivery for the array's components.
NEW QUESTION # 24
After racking a new FlashArray with one data pack, how should DirectFlash modules be installed?
Answer: C
Explanation:
Proper airflow and thermal management are critical for the reliability of high-density storage arrays.
FlashArray chassis are designed with specific airflow baffles and cooling zones that rely on the drive bays being populated in a specific order.
When installing a new FlashArray with a single data pack (typically 10 drives), the Implementation Engineer must install the DirectFlash Modules starting in bay 0, filling from left to right .
* Bay 0 is typically the leftmost slot (when facing the front of the array).
* Filling slots 0-9 ensures that the first "cooling zone" is properly pressurized, forcing air through the populated modules and the chassis midplane correctly.
* Leaving gaps (e.g., installing in slots 10-19 while 0-9 are empty) can disrupt the airflow path, potentially leading to hotspots or inefficient cooling for the controllers behind the backplane.
* Additionally, the software enumeration of drives often expects contiguous population starting from the lowest index for logical clarity, though cooling is the primary physical constraint.
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NEW QUESTION # 25
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