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NEW QUESTION # 146
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:
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 # 147
Which Purity command can be used to validate I/O is balanced across initiators?
Answer: A
Explanation:
To validate that I/O traffic is correctly distributed across a host's initiators (Fibre Channel WWNs or iSCSI IQNs), the correct command is purehost monitor --balance.
Ensuring "multipathing balance" is a critical post-installation check. If a host is configured correctly with Multipath I/O (MPIO) software (like DM-Multipath on Linux or MPIO on Windows), read/write requests should be distributed relatively evenly across all active paths to the storage array.
Command Function: The purehost monitor command provides real-time performance statistics for hosts. Adding the --balance flag switches the view to a granular breakdown of IOPS and Bandwidth per initiator for the specified host.
Interpretation: An Implementation Engineer looks for initiators showing 0 IOPS or significantly lower traffic than others, which would indicate a path failure, zoning issue, or incorrect MPIO policy (e.g., Failover Only instead of Round Robin). Options A and B are incorrect syntax; purehost list shows configuration (not real-time stats), and iobalance is not a valid Purity command argument.
NEW QUESTION # 148
A customer has purchased a FlashArray//XL. What power cables are required in order to connect this array to rack PDUs?
Answer: B
Explanation:
FlashArray//XL arrays require four power cables with C19 (receptacle) to C20 (plug) connectors to connect properly to rack PDUs, supporting redundant power supplies and higher power demands.
NEW QUESTION # 149
Which command should the Implementation Engineer use to easily verify connectivity to Pure1 from a FlashArray?
Answer: A
Explanation:
After configuring the management network and proxy settings, it is essential to validate that the FlashArray can successfully transmit logs and telemetry to the Pure1 cloud. The specific command designed to trigger a manual test of this "Phone Home" functionality is purearray phonehome test.
purearray phonehome test: Initiates a test cycle where the array attempts to resolve the Pure1 endpoint, establish a secure connection, and send a sample payload. Success here confirms that DNS, firewall rules, and proxy settings are correct for outbound telemetry.
puresupport phonehome: This is often used to manually send logs (e.g., puresupport phonehome --send), but the test syntax is specifically under purearray.
purearray test pinghome: This is not a valid standard command for this specific validation.
Using the correct command ensures the engineer receives a clear "Success" or "Failure" message to sign off on the installation checklist.
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NEW QUESTION # 150
On FlashArray models that use standard DFMs instead of DFMDs, which NVRAM bays are always populated?
Answer: B
Explanation:
Understanding the hardware architecture and proper drive population rules is critical during a Pure Storage FlashArray installation. FlashArray models generally utilize either standard DirectFlash Modules (DFMs) or DirectFlash Modules with distributed NVRAM (DFMDs).
DFMDs, primarily introduced with models like the FlashArray//XL, integrate non-volatile write caching directly into the capacity drives themselves, eliminating the need for dedicated NVRAM hardware modules.
However, standard FlashArray models-such as the //X10, //X20, //X50, //X70, and //X90-use standard DFMs strictly for capacity. Because standard DFMs do not contain built-in NVRAM, these arrays rely heavily on specialized, dedicated NVRAM modules to safely acknowledge incoming writes and protect data in flight against unexpected power loss or controller failures.
To maintain absolute high availability and guarantee there is no single point of failure within the write cache, NVRAM is always mirrored across two separate physical modules. During the physical hardware installation of a non-DFMD array, the Implementation Engineer must populate the dedicated NVRAM bays located centrally on the chassis. According to official Pure Storage implementation guidelines, the primary pair of NVRAM modules must always be installed in the first two designated bays, which are explicitly labeled NVB0 and NVB1. Placing the modules in alternate or staggered bays (such as NVB0 and NVB2) violates the strict hardware population rules and will prevent the array from initializing.
NEW QUESTION # 151
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