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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Pre-Installation / Pre-Upgrade | 25% | - Hardware and software compatibility verification - Planning and preparation steps - Environment and configuration prerequisites |
| Topic 2: Installation | 23% | - Network and storage setup - Physical installation procedures - System initialization and configuration |
| Topic 3: Post-Installation / Post-Upgrade | 20% | - Troubleshooting and issue resolution - Validation and verification procedures - Configuration optimization |
| Topic 4: Upgrades | 32% | - Firmware and component updates - Non-disruptive upgrades (NDU) - Purity version interoperability - Controller and shelf upgrades |
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NEW QUESTION # 173
An Implementation Engineer is getting ready to install four DFMs into a 16-module efficiency bundle and notices that the new modules are DFMDs while the installed modules are DFMs. What should the Implementation Engineer do to get the array using a 20-module Wide write group?
Answer: C
Explanation:
FlashArray performance and capacity efficiency are optimized when drives are grouped into "Wide Write Groups" (typically 20 modules). Purity OS generally enforces strict homogeneity within a write group to ensure consistent performance and reliability. Specifically, mixing standard DirectFlash Modules (DFM) with DirectFlash Modules with Distributed NVRAM (DFMD) in the same write group is restricted by default because of the architectural differences in how they handle persistent memory and I/O acknowledgment.
However, in upgrade scenarios where a customer is expanding an existing 16-module DFM group to a 20-module group using newer DFMD spares or expansion packs, Purity includes an engineering tunable to permit this mixed configuration. The correct procedure is to physically install the new DFMDs and run the admission command. Because of the mix, the array might initially hesitate or create a separate group. To force the creation of a single 20-drive Wide Write Group (WWG), the Implementation Engineer must work with Pure Storage Support to apply the specific tunable puretune --set ALLOW_DFMD_IN_DFM_WWG 1. This overrides the default restriction, allowing the system to merge the disparate module types into a single, high-efficiency capacity pool.
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NEW QUESTION # 174
A customer has purchased a DirectFlash Shelf, but lacks available space in the same rack as the chassis. There is available space in a rack 6m away. What step should be taken prior to implementation?
Answer: B
Explanation:
The correct pre-implementation step is to make space in the rack where the chassis is located.
Cabling Standards: DirectFlash Shelves (DFS) connect to the FlashArray via RoCE (RDMA over Converged Ethernet) using QSFP28 cables. The standard cabling kits provided by Pure Storage typically include short-range Passive DACs (e.g., 1m to 3m) or short Active Optical Cables (AOCs).
Distance Constraint: A distance of 6 meters between racks usually exceeds the length of standard included cables and introduces complexity regarding cable management, signal integrity, and "span" policies. While custom long-range optical cables exist, they are not standard stock and relying on ordering a non-standard "7m" cable (Option B) is a risk.
Best Practice: Pure Storage installation guides explicitly recommend installing expansion shelves in the same rack and contiguous to the controller chassis whenever possible. This ensures optimal airflow, ease of serviceability, and adherence to standard cabling schematics. Moving the entire controller chassis (Option C) is a disruptive and heavy-lift operation, whereas clearing 3U of space (Option A) is the standard facility preparation task required for a successful deployment.
NEW QUESTION # 175
A customer has a FlashArray X20R3 with 22/22 data packs in the chassis at 80% space usage and wishes to swap one of the data packs for a 45TB pack. What step needs to be taken to facilitate this consolidation?
Answer: A
Explanation:
Adding a DirectFlash Shelf with sufficient temporary extra capacity (63TB) allows data to be evacuated from the smaller 22TB packs during the swap, enabling consolidation without reducing array usage beforehand.
NEW QUESTION # 176
Refer to the exhibit.
During the puresetup portion of the new controller setup of an NDU, the Implementation Engineer gets an error message regarding missing or unassigned network interfaces.
What action should the Implementation Engineer take next?
Answer: A
Explanation:
During a cross-generational Hardware Non-Disruptive Upgrade (HWNDU), such as migrating from a FlashArray//XR3 to an //XR4, the physical network port layout changes significantly. Older controllers often utilized integrated onboard ports (like eth2 and eth3) for Replication or iSCSI. In newer architectures, these services are shifted to dedicated OCP mezzanine cards or PCIe expansion slots, which may enumerate differently within the operating system.
When the Implementation Engineer runs the puresetup script to initialize the newly inserted controller, the software attempts to validate the legacy network configuration against the new physical hardware topology. If it cannot find the exact physical ports that were mapped on the old controller, puresetup will pause and display an interactive warning or error message indicating that certain network interfaces are missing.
Because this mismatch is an expected architectural consequence of the hardware upgrade, the correct procedure is to acknowledge the warning and continue with the setup process . The engineer must allow the controller to finish its base initialization and join the cluster quorum. Once the new controller is online and functioning as a secondary node, the engineer can log into the Purity CLI or GUI and manually use the purenetwork commands to reassign the affected services (e.g., Replication or iSCSI) to the new, correctly enumerated physical ports before proceeding with the controller failover. Stopping the process or attempting to force the script to accept invalid ports will stall the upgrade.
NEW QUESTION # 177
An Implementation Engineer has completed cabling a DirectFlash Shelf (DFS) to the FlashArray.
Which command should the Implementation Engineer run to verify that the cabling was completed correctly?
Answer: D
Explanation:
Adding an external DirectFlash Shelf (DFS) or a legacy SAS Expansion Shelf to a Pure Storage FlashArray requires precise physical cabling to ensure backend high availability. Because the controllers utilize an active
/active backend topology-where both controllers must maintain redundant loops to every single capacity shelf-a single misplaced cable can cause a severe hardware fault.
Once the physical installation is complete, the Implementation Engineer must definitively validate the topology before handing the array over to production. To do this, they log into the local KVM console or SSH session using the restricted puresetup account. From here, the official Pure Storage post-installation procedure dictates running two specific Python validation scripts: storage_view.py enclosures and storage_view.py config .
While both are used, storage_view.py config is the primary command utilized to map the specific SAS or NVMe-oF (RoCE) port bindings. The script actively polls the physical ports on the rear of the controllers and traces the loops down through the I/O Modules (IOMs) on the shelves. If the cabling is flawless, the CLI will explicitly return: "No errors detected." If a cable is crossed (e.g., Controller 0 plugged into IOM 1 instead of IOM 0), the script will instantly flag the topology mismatch, allowing the engineer to correct it on the spot.
NEW QUESTION # 178
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