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| Section | Objectives |
|---|---|
| Installation and Initial Configuration | - Host connectivity
|
| Monitoring, Performance, and Troubleshooting | - System monitoring
|
| Data Protection and Availability | - Replication
|
| FlashArray Architecture and Core Concepts | - FlashArray hardware and architecture overview
|
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NEW QUESTION # 84
An Implementation Engineer is performing an inventory for an NDU from a FlashArray//X70R2 to a FlashArray//X70R4 and discovers that a complete FlashArray//X70R4 was shipped instead of an NDU kit.
What is the minimum hardware the Implementation Engineer should use from the new array to complete the NDU?
Answer: A
Explanation:
When performing a hardware non-disruptive upgrade (NDU) from a FlashArray//X70 R2 to a FlashArray
//X70 R4, the Implementation Engineer must understand which components govern the compute upgrade and which house the actual customer data and state. A standard NDU kit for this specific inter-generational upgrade strictly includes the new //XR4 controllers and updated Power Supply Units (PSUs).
The //XR4 controllers utilize significantly more powerful Intel processors and PCIe Gen4 architecture compared to the older //XR2 models. Consequently, they draw considerably more power, necessitating a mandatory upgrade from the older //XR2 PSUs to the higher-wattage units included with the //XR4.
However, the existing NVRAM modules, chassis midplane, and DirectFlash Modules (capacity drives) currently serving data must absolutely remain in place. The legacy NVRAM holds the active, unwritten write cache for the array. If an engineer mistakenly uses the entire shipped //XR4 array (swapping NVRAM modules or migrating drives prematurely without a swing shelf procedure), they risk severe data corruption and an unrecoverable cache loss event. Thus, to safely complete the NDU while preserving data, only the controllers and the power supplies should be harvested from the newly shipped chassis.
NEW QUESTION # 85
At the completion of an upgrade, what command should the Implementation Engineer run to send phonehome logs?
Answer: B
Explanation:
Following the successful completion of any major maintenance event-such as a Hardware Non-Disruptive Upgrade (HWNDU) or a Purity//FA software update-it is a critical best practice to force the array to immediately synchronize its state with the Pure1 cloud infrastructure. During the upgrade, the array may have been placed in maintenance mode (using the puremaintenance tag) to suppress alerts as controllers were rebooted or replaced.
Once the cluster is healthy and fully operational again, the Implementation Engineer must manually trigger the Callhome Connection Manager (CCM) to package and transmit the latest system telemetry, logs, and configuration state to Pure Storage Support. The correct and officially supported Purity CLI command to accomplish this is purearray phonehome --send-today .
Executing this command compiles the system logs, performance metrics, and hardware state generated throughout the current day (which encompasses the entire upgrade window) and pushes them over the secure outbound HTTPS tunnel to Pure Storage. This allows the backend support systems to baseline the new configuration, clear any lingering upgrade-related alerts, and ensure the array is accurately represented in the customer's Pure1 Manage dashboard. The other options presented (purelogs, --send-logs) use fabricated syntax that the Purity operating system will not recognize.
NEW QUESTION # 86
When installing a FlashArray//XR5, at a minimum, which slots will use NVRAM?
Answer: C
Explanation:
The FlashArray//XR5 (and //E family) introduces a significant architectural shift regarding Non-Volatile RAM (NVRAM). In previous generations (like R2/R3), NVRAM was provided by dedicated PCIe modules installed in specific "NVB" slots in the chassis.
In the //XR5 architecture, Pure Storage moved to Distributed NVRAM. The NVRAM functionality is integrated directly into the DirectFlash Modules (specifically the DFMDs - DirectFlash Module with Distributed NVRAM). This allows the NVRAM capacity to scale with the storage and removes the bottleneck of dedicated slots.
For a system to function correctly, a minimum number of these NVRAM-equipped modules must be present to form the initial write buffer and system quorum. The standard installation requirement for an //XR5 is that the first 10 slots (Slots 0-9) are populated with these specific DFMDs. This ensures there is sufficient distributed NVRAM capacity to boot the Purity operating environment and handle incoming writes safely. The Implementation Engineer must populate these slots first before adding standard DFMs in the remaining slots.
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NEW QUESTION # 87
Which command should an Implementation Engineer use to allow Support access to an array?
Answer: C
Explanation:
To enable Pure Storage Support to access the FlashArray for diagnostics, upgrades, or troubleshooting, the correct command is purearray remoteassist --connect.
Remote Assist (RA): This feature creates a secure, outbound SSH tunnel from the FlashArray to the Pure Storage support infrastructure. It allows support engineers to log in remotely without requiring the customer to open inbound firewall ports or set up a VPN.
Command Syntax:
purearray remoteassist: Running this command without arguments simply displays the current status of the session (e.g., "connected" or "disconnected") and the port number.
--connect: This is the specific flag (action) required to initiate the tunnel.
Workflow: When an Implementation Engineer is on-site and needs assistance (or is handing over for a remote upgrade), they execute this command. The output will confirm "Remote Assist enabled" and provide a session name/port, which the engineer then communicates to the Support team. The session typically stays active for a set duration (default 24 hours) or until manually disconnected (purearray remoteassist --disconnect).
NEW QUESTION # 88
What is the longest supported cable length for use with DirectFlash shelves?
Answer: B
Explanation:
DirectFlash Shelves (DFS) connect to the FlashArray controllers using high-speed protocols (typically RoCE - RDMA over Converged Ethernet) that require high-fidelity signal integrity. Due to the high bandwidth (50Gb or 100Gb speeds) and low latency requirements of the NVMe-oF (NVMe over Fabrics) protocol used for backend connectivity, the physical cabling length is strictly limited.
Pure Storage officially supports a maximum cable length of 3 meters for connecting DirectFlash Shelves to the controller or for daisy-chaining shelves (where supported). Cables longer than 3 meters (such as 5m or 7m) introduce signal attenuation and latency that can destabilize the backend fabric, leading to CRC errors, path flapping, or drive disconnections.
Implementation Engineers must ensure that the rack layout allows the shelves to be placed within this 3-meter radius of the controllers. Typically, shelves are racked immediately above or below the controller chassis to minimize cable run distance. Attempting to span across multiple racks using longer, unsupported cables will result in an unsupported configuration and likely immediate I/O errors.
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NEW QUESTION # 89
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