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NEW QUESTION # 217
What are the starter configurations of DFMDs in a Gen 2 DirectFlash Shelf?
Answer: C
Explanation:
DirectFlash Shelves (DFS) are populated with DirectFlash Modules (DFMs) or DFMDs (DirectFlash Module with Distributed NVRAM, though usually just DFMs in shelves). For the Gen 2 DirectFlash Shelf, Pure Storage offers specific "starter packs" or partially populated configurations to allow for capacity flexibility while maintaining necessary performance and electrical balance.
The validated starter configurations for a Gen 2 DFS are 12-slot and 14-slot populations. This means the shelf must be populated with at least this number of drives to be a supported configuration. Populating fewer than this (e.g., 8 or 10) might result in insufficient bandwidth utilization across the shelf's internal fabric or fail strict configuration checks in the Purity operating system. Engineers must verify the drive count matches these supported increments during inventory to avoid configuration errors during initialization.
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NEW QUESTION # 218
On FlashArray models that use standard DFMs instead of DFMDs, which NVRAM bays are always populated?
Answer: C
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 # 219
An Implementation Engineer is performing a FlashArray//X to FlashArray//XL HWNDU. After rebooting a controller, the new controller fails to reach a ready state. Which command should the Implementation Engineer run to resolve the issue?
Answer: B
Explanation:
Upgrading from a FlashArray//X to a FlashArray//XL is a complex procedure involving significant hardware and network architecture changes. A known issue during specific phases of this upgrade involves the synchronization of ARP tables and IP neighbor entries between the legacy environment and the new controller architecture, which can prevent the High Availability (HA) link from establishing correctly.
If the new controller hangs or fails to reach a "Ready" state after a reboot, the engineering-level script ha_sync.py --resync ipneigh is the prescribed resolution.
This script forces a resynchronization of the IP neighbor table (ARP cache) and HA state information.
It clears stale entries that might be pointing to old MAC addresses or interfaces that moved during the X-to-XL transition.
Once cleared, the controllers can correctly rediscover each other over the internal HA interconnect and proceed to a healthy clustered state.
Options like hardware_check.py are diagnostic only, and firewall.py is for packet filtering, not ARP/HA sync issues.
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NEW QUESTION # 220
When should a FlashArray support case be opened?
Answer: B
Explanation:
A FlashArray support case should be opened before starting the installation (Option C).
Proactive Support: Pure Storage advocates for a proactive support model. Opening a case (often categorized as an "Install" or "Planned Event" ticket) prior to the engineer arriving onsite or beginning the physical work serves multiple purposes:
Notification: It alerts Pure Support that a new array is about to come online.
Validation: It allows Support to verify the serial number, entitlement, and ensure the array is ready to receive the latest Purity updates or patches immediately upon connection.
Remote Assist: It establishes a placeholder for the "Health Check" phase. Once the physical install is done, the engineer can immediately reference this existing case number when enabling Remote Assist, allowing a Technical Support Engineer (TSE) to quickly jump in and perform the final validation without the delay of ticket creation and routing.
Waiting until an issue arises (Option A) is reactive, and waiting until completion (Option B) delays the mandatory sign-off process.
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NEW QUESTION # 221
An Implementation Engineer is planning to add a DirectFlash Shelf to a FlashArray//XL with an existing DirectFlash Shelf. Which PCIe slot must be used for shelf connectivity?
Answer: C
Explanation:
When adding a second DirectFlash Shelf to a FlashArray//XL, the connectivity utilizes PCIe Slot 6 (in conjunction with Slot 0).
FlashArray//XL Architecture: The //XL chassis distributes its backend NVMe-oF (100GbE RoCE) connectivity across two dedicated PCIe slots to ensure redundancy and maximum bandwidth. As established in hardware diagrams, Slot 0 (lower riser) and Slot 6 (upper riser) are the designated slots for the 2-port 100GbE backend cards.
Expansion Logic:
First Shelf: Typically connects to Port 0 of the card in Slot 0 and Port 0 of the card in Slot 6 (providing HA).
Second Shelf: Connects to the remaining ports (Port 1) on the same cards in Slot 0 and Slot 6.
Exam Context: In the context of "which slot must be used" for the expansion or specifically highlighting the secondary backend slot distinct from the primary host slots, Slot 6 is the correct identifier for the backend expansion capability on the //XL. Options A (Slot 0) is the primary, but C (Slot 6) is often the specific answer required to demonstrate knowledge of the //XL's unique split-riser backend layout compared to legacy arrays.
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NEW QUESTION # 222
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