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NEW QUESTION # 54
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: C
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 # 55
A FlashArray//XL is used for NVMe-RoCE services. The array has been lightly loaded and has performed as expected. A new workload has been added to the array, which is within the array's performance envelope. The change has resulted in extreme latency and service outages for all workloads utilizing NVMe-RoCE.
Which misconfiguration is this a symptom of?
Answer: B
Explanation:
Requirement for Lossless Ethernet: NVMe over RoCE (RDMA over Converged Ethernet) requires a lossless fabric to function correctly. Unlike standard iSCSI which uses TCP for error recovery, RoCE assumes the network will not drop packets. If the network is "lossy," performance degrades significantly.
The Role of PFC: Priority Flow Control (PFC) (IEEE 802.1Qbb) is the specific mechanism used in Data Center Bridging (DCB) to provide flow control on a per-priority basis. It allows the switch to send a "pause" frame to the sender when buffers are full, preventing packet drops.
Symptom Analysis: In the scenario provided, the array itself is not overloaded ("within the performance envelope"). However, the addition of a new workload increased traffic to the point where buffer congestion occurred. Because PFC was likely misconfigured (either on the FlashArray ports, the network switches, or the host NICs), the network dropped packets instead of pausing traffic. This leads to "go-back-N" retransmissions and massive latency spikes that affect all workloads sharing that fabric.
Pure Storage Best Practices: Pure Storage documentation for NVMe-RoCE emphasizes that PFC must be enabled and consistent across the entire path. If there is a mismatch in PFC configuration, the resulting packet loss will cause the symptoms described: extreme latency and potential service outages.
NEW QUESTION # 56
An X20R4 array containing 10 x 4.5TB DirectFlash Modules is running out of capacity. The customer found a data pack scheduled for a FlashArray//C array and has inserted it into the array. The customer is unable to admit the new capacity.
What is a possible reason for this?
Answer: A
Explanation:
Hardware Architecture (X vs. C): Pure Storage maintains two primary FlashArray lines: the FlashArray//X (performance-oriented) and the FlashArray//C (capacity-oriented).
Flash Types (TLC vs. QLC):
FlashArray//X (like the X20R4 mentioned in the question) uses TLC (Triple-Level Cell) DirectFlash Modules (DFMs). TLC provides high performance and high endurance, which is necessary for latency-sensitive mission-critical workloads.
FlashArray//C uses QLC (Quad-Level Cell) DirectFlash Modules. QLC provides significantly higher density at a lower cost per GB, but it has different performance and endurance profiles compared to TLC.
Compatibility Constraints: Purity//FA is designed to manage specific flash geometries. QLC modules are not compatible with the //X series arrays. The controller logic and software-defined flash management in an X20R4 are tuned for the voltage and timing characteristics of TLC flash.
The Admission Process: When a new data pack is inserted, the array performs a "handshake." If the controller detects a module type that it is not hardware-qualified to support (in this case, QLC in an //X chassis), it will refuse to admit the capacity to prevent system instability or data integrity issues.
Why Option A is incorrect: Modern FlashArrays (since the //M series) use NVMe over a PCIe backplane for DirectFlash Modules. Pure moved away from SAS (Serial Attached SCSI) for its primary data drives years ago to eliminate the performance bottlenecks associated with the SAS protocol.
Why Option C is incorrect: An X20R4 uses TLC flash. If the data pack were TLC, it would likely be compatible (provided it met the minimum module count and Purity version requirements).
NEW QUESTION # 57
FlashArray sent Alert 51 - Protection Group Replication Delayed.
What steps should be taken?
Answer: B
Explanation:
Understanding Alert 51: On a Pure Storage FlashArray, Alert 51 signifies that a Protection Group's replication is lagging behind its scheduled completion time. This does not necessarily mean the connection is "down," but rather that the volume of data being sent is exceeding the available throughput or is being queued behind other tasks.
The Triage Process:
Open Alerts: You must check for related alerts (like Alert 20 for "Replication Connection Down") to determine if the delay is caused by a total link failure or just congestion.
Replication Jobs in Progress: Because FlashArray uses a specialized engine to manage replication, having multiple large snapshots from different Protection Groups replicating simultaneously can saturate the "replication pipe." Checking active jobs helps determine if there is a scheduling "traffic jam." Replication Bandwidth: Comparing the current outgoing replication throughput against the historical average or the physical limit of the replication ports helps identify if the delay is due to a sudden increase in Data Change Rate (churn) or a reduction in network performance.
Why Option B is incorrect: If a Protection Group were disabled, replication wouldn't be "delayed"-it would be stopped, which triggers a different alert state. Cabling issues usually result in "Connection Down" alerts rather than just "Delayed" alerts.
Why Option C is incorrect: Disconnecting replication is a destructive troubleshooting step that will only increase the lag and RPO. You should always analyze the existing data flow before breaking the connection.
NEW QUESTION # 58
Refer to the exhibit:
What is the most likely cause of system space in this capacity graph?
Answer: B
Explanation:
Analyzing the Graph: The provided capacity graph shows a sharp, vertical drop in Unique and Shared space (the teal/green sections) at approximately 10:45. Simultaneously, there is a massive spike in System space (the grey shaded area).
The "System" Space Spike: In Purity, when a volume is deleted and eradicated, the data isn't physically wiped from the flash modules instantly. Instead, the logical references are removed, and the blocks are moved into a "Pending Reclamation" state. In older versions of Purity reporting (or specific views), this pending work is often categorized under System space until the background Garbage Collection (GC) process can physically reclaim it.
The Decay Curve: Notice the grey "System" area gradually tapers down over the following hours (from 11:00 to 14:00). This is the visual representation of the array's Garbage Collection engine working in the background to physically free up those blocks.
Why Option C is incorrect: If SafeMode were enabled, the space would not move into "System" space in this manner; it would remain locked in the Snapshots or Destroyed bucket for the duration of the retention period, preventing the graph from dropping at all.
Why Option A is incorrect: If space reclamation stopped working, the grey "System" area would stay flat and would not decay over time. The fact that it is trending downward proves that reclamation is actively processing the deleted volume.
NEW QUESTION # 59
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