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NEW QUESTION # 187
During a FlashArray//X to FlashArray//XL hardware upgrade, when should the Implementation Engineer insert the DFMd modules into the FlashArray//XL?
Answer: C
Explanation:
Upgrading from a FlashArray//X to a FlashArray//XL involves a significant architectural change, often requiring a data migration or a specific "chassis replacement" workflow known as a Data-in-Place upgrade where the new chassis temporarily acts as an expansion shelf. In this specific procedure, the new FlashArray//XL chassis is not immediately populated with its final drives (DFMDs) before power-on because it first needs to be configured to accept data or join the cluster in a controlled state.
The procedure requires the Implementation Engineer to boot the FlashArray//XL chassis first and configure it into Shelf Mode (SPM). Only after the chassis is successfully running in this mode-effectively acting as a passive SAS/Ethernet attached shelf to the existing controllers-are the DirectFlash Modules (DFMd) inserted.
Inserting them earlier could cause the array to attempt a full boot sequence or initialize a new array instance, complicating the upgrade logic. By waiting until Shelf Mode is confirmed, the engineer ensures that the modules are recognized correctly as part of the migration target resources, allowing Purity to manage the layout and data redistribution correctly from the source array.
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NEW QUESTION # 188
Which PCI cards must be validated on the Bill of Materials (BOM) to allow an Implementation Engineer to attach a DirectFlash Shelf to a FlashArray//XL130R5?
Answer: B
Explanation:
The FlashArray//XL series (such as the XL130R5) utilizes a modern backend connectivity architecture for its expansion shelves, specifically the DirectFlash Shelf (DFS). Unlike older generations that might have used SAS (Serial Attached SCSI) for shelf connectivity, the //XL architecture relies on high-speed Ethernet with RoCE (RDMA over Converged Ethernet) to communicate with external media shelves. This ensures that the NVMe drives in the shelf perform with the same low latency as those in the head unit.
To attach a DirectFlash Shelf to a FlashArray//XL130R5, the chassis must be populated with specific PCIe interface cards designated for shelf back-end connectivity. The correct part for this is the FA-XL-100G Ethernet/RoCE 2-Port card. This card provides the necessary 100 Gigabit Ethernet bandwidth and RoCE protocol support required for the NVMe-oF (NVMe over Fabrics) backend fabric that Pure Storage uses.
It is crucial to distinguish this from host-facing cards. While an "iSCSI/RoCE" card exists, the shelf connectivity specifically utilizes the "Ethernet/RoCE" designation in the BOM to differentiate backend fabric ports from frontend host ports. The 200G options are generally reserved for host connectivity or inter-array clustering in specific high-performance setups, but the standard validated card for connecting the DFS to the
//XL130R5 is the 100G Ethernet/RoCE adapter. Verifying this line item on the BOM prevents onsite delays where the engineer might otherwise find themselves with incompatible ports for the expansion shelves.
NEW QUESTION # 189
What command will view NVRAM install and update status?
Answer: A
Explanation:
The command purehw list --all is the correct CLI instruction to view the comprehensive status of all hardware components, including the NVRAM modules.
Command Scope: While purehw list provides a general hardware summary, the --all flag (or specifying --type nvram) ensures that granular details about the NVRAM modules-such as their presence, health status, and firmware/update status-are displayed.
NVRAM Context: In FlashArray models that utilize dedicated NVRAM modules (like the FA-400, //M, or specific //X configurations), these components are critical for write acknowledgement. During an upgrade or installation, verification that these modules are "healthy" and "idle" (not destaging) is mandatory.
Incorrect Options:
purearray list (Option A) displays high-level array attributes like the array name, ID, and overall OS version, but not component-level hardware status.
puredrive list (Option B) is specifically for managing the storage media (SSDs/DirectFlash Modules) and does not report on the non-volatile RAM cache modules housed in the controller or chassis.
NEW QUESTION # 190
An Implementation Engineer is onsite to install a new DFM data pack (DP) to CH0.BAY10-CH0.BAY19 of a FlashArray.
After adding the drives to the chassis, which command should the Implementation Engineer run to verify if the new DP is in a wide write group?
Answer: C
Explanation:
The puredrive list --pack command shows detailed information about the specified data pack, including whether its drives are part of a wide write group.
NEW QUESTION # 191
Which FlashArray//XL DirectMemory Modules (DMMs) configuration condition is true?
Answer: A
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 # 192
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