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>> FlashArray-Storage-Professional Valid Exam Notes <<
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NEW QUESTION # 31
An administrator is preparing an array pair for ActiveDR and is trying to calculate the total minimum bandwidth requirement.
What percent of bandwidth above the incoming write rate should be allocated to accommodate for unexpected write bursts and still maintain near-sync RPO?
Answer: C
Explanation:
ActiveDR Bandwidth Sizing: ActiveDR is a continuous, asynchronous replication technology designed to provide near-zero RPO. Because it streams data continuously rather than in discrete snapshot intervals, the bandwidth between the source and target arrays must be able to handle the application's write workload.
Handling Write Bursts: Application workloads are rarely flat; they have peaks and valleys. If you size the bandwidth exactly to the average change rate, any burst in write activity will cause the replication lag to increase, thereby increasing your RPO.
The 30% Rule: Pure Storage best practices and sizing guides recommend providing a 30% buffer (headroom) above the measured average write rate. This extra capacity ensures that during a high-IO period, the replication engine has enough "pipe" to catch up quickly and return to a near-sync state.
Calculation Example: If a workload generates an average of 100 MB/s of new unique data, the administrator should ensure at least 130 MB/s of usable, dedicated bandwidth is available between the sites.
Consequences of Under-sizing: If only 10% (Option A) is used, the array may struggle to recover from even minor bursts, leading to a consistently climbing RPO. 50% (Option B) is often considered safe but can be cost-prohibitive or overkill for standard networking budgets unless the workload is exceptionally volatile.
NEW QUESTION # 32
An administrator needs a comparison of FA File performance across multiple arrays.
What Pure1 Manage report will provide the best results?
Answer: B
Explanation:
Pure1 Manage Capabilities: Pure1 is a SaaS-based platform that provides a "single pane of glass" view across an entire fleet of FlashArrays. It excels at aggregating metrics that are otherwise siloed on individual arrays.
Specialized File Metrics: Because FlashArray File (FA File) operates as a specific service layer within Purity, its performance metrics (NFS/SMB latency, throughput, and IOPS) are tracked separately from traditional block storage.
The File Systems Performance Report: This specific report/view in Pure1 allows administrators to:
Select multiple file systems residing on different arrays.
Overlay their performance graphs to identify trends or outliers.
Filter by specific protocol (NFS vs. SMB) to see how different workloads are behaving across the infrastructure.
Why Options B and C are less ideal:
Overview Dashboard: While great for a "health at a glance" check (showing total capacity and high-level alerts), it does not provide the granular, side-by-side performance comparison required for a deep-dive analysis.
Array Performance: This report typically shows the total load on the controllers. While this includes file traffic, it often aggregates it with block traffic, making it difficult to isolate how the file services specifically are performing across the fleet.
Analytical Advantage: Using the File Systems Performance report allows the administrator to correlate performance spikes with specific file-level events, such as a large backup job or a high-intensity data migration occurring on one array versus another.
NEW QUESTION # 33
A network admin is trying to setup Pure1 access and phone home logging on the array.
What port should the admin ensure is opened for the array?
Answer: A
Explanation:
Pure1 and Phone Home: Pure1 is a cloud-based management and monitoring platform. For the FlashArray to communicate its health data, performance metrics, and alerts to Pure Storage, it must be able to "Phone Home." The Power of HTTPS: This communication is encrypted and sent via the HTTPS protocol. Consequently, the standard port for HTTPS, TCP 443, must be opened for outbound traffic on the management network.
Firewall Configuration: The array controllers initiate an outbound connection to the Pure Storage cloud (specifically to destinations like cloud-connect.purestorage.com). Because it is an outbound-initiated connection, most stateful firewalls will allow the return traffic automatically once port 443 is permitted.
Why Option A is incorrect: Port 22 (SSH) is used for secure shell access to the array's CLI. While essential for local administration, it is not used for the automated Phone Home or Pure1 telemetry data stream.
Why Option B is incorrect: Port 8117 was historically used for the "Remote Assist" tunnel in older Purity versions. However, even for Remote Assist, modern Purity versions have transitioned to using port 443 to simplify firewall rules for customers. It is not the standard port for the general Phone Home/Pure1 logging service.
Verification: An administrator can verify connectivity by running the purearray test phonehome command in the CLI. If port 443 is blocked, the test will fail with a connection timeout.
NEW QUESTION # 34
How would a FlashArray administrator view external latency for write requests for a specific volume?
Answer: B
Explanation:
The Analysis Tab: In the Pure Storage FlashArray GUI, the Analysis tab is the primary location for deep-dive performance troubleshooting and historical data visualization. While the Storage tab provides a real-time "at-a-glance" view of a volume, the Analysis tab allows for granular filtering of specific metrics.
Granular Metric Filtering: When troubleshooting latency, it is critical to distinguish between Read and Write operations, as they interact with the Purity operating environment differently (e.g., writes hitting NVRAM vs. reads hitting the Flash modules).
External vs. Internal Latency: Pure Storage differentiates between "Array Latency" (internal processing) and "External Latency" (the time seen by the host). By navigating to Analysis > Performance, an administrator can drill down into the Volumes sub-tab.
Selecting the Volume and Operations: Once a specific volume is selected, the chart typically defaults to a combined view. To isolate "external latency for write requests," the administrator must use the legend/filters to select "Write" while deselecting "Read" and "Mirrored Write" (which refers to synchronous replication traffic in ActiveCluster environments). This provides a clean graph of the round-trip write latency specifically for that volume's host I/O.
Why other options are incorrect: Option B refers to physical port health and hardware status, not volume-level performance. Option C provides basic volume metadata and real-time total latency, but lacks the granular historical filtering (selecting/deselecting specific I/O types) required for detailed performance analysis.
NEW QUESTION # 35
Which command provides the negotiated port speed of an ethernet port?
Answer: C
Explanation:
On a Pure Storage FlashArray, Ethernet ports operate at both a physical hardware layer and a logical network configuration layer. If you need to verify the actual physical negotiated port speed of an Ethernet port (for example, verifying if a 25GbE port negotiated down to 10GbE due to switch configurations or cable limitations), you must query the hardware layer directly.
The command purehw list --all --type eth interacts directly with the physical NIC hardware components to report their true link status, health, and dynamically negotiated hardware link speed.
Here is why the other options are incorrect:
purenetwork eth list -- all (B): The purenetwork command suite is primarily focused on the logical Layer 2/Layer 3 networking stack. It is used to configure and list IP addresses, subnet masks, MTU sizes (Jumbo Frames), and routing, rather than focusing on the physical hardware negotiation details of the NIC itself.
pureport list (A): The pureport command suite is specifically used for managing and viewing storage protocol target ports. An administrator would use this to list the array's Fibre Channel WWNs or iSCSI IQNs to configure host zoning or initiator connections, not to verify Ethernet link negotiation speeds.
NEW QUESTION # 36
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