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| Section | Objectives |
|---|---|
| Topic 1: FlashArray Administration | - Storage Concepts - Host Connections Configuration - Volume Configuration - FA File Services Configuration - Array Configuration and Management |
| Topic 2: Troubleshooting | - Alerts - Troubleshooting Resources - Incorrect Configuration - Port Identification and Configuration |
| Topic 3: Data Protection | - ActiveCluster - SafeMode - Snapshots - ActiveDR - Replication |
| Topic 4: Monitoring | - Pure1 Auditing and Alerts - Meta Forecasting - Reporting from Pure1, Graphical User Interface (GUI), and Command Line Interface (CLI) |
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NEW QUESTION # 36
A customer with an X50R2 array connected to 110V power is due for an upgrade to the latest controller generation.
What is required to allow this upgrade to proceed?
Answer: A
Explanation:
As Pure Storage has iterated through FlashArray generations (moving from //X R2 to R3, R4, and beyond), the power density and performance capabilities of the controllers have increased significantly. Modern high-performance controllers, such as those found in the //X R4 or //XL series, have strict power requirements that often exceed what a standard 110V/120V (Low-Line) circuit can provide.
To support the higher wattage and current draw of modern CPUs and NVRAM modules, Pure Storage requires 200-240V (High-Line) power for its latest generation controllers. If an existing array is currently running on 110V power, it must be migrated to 220V power outlets before the upgrade can proceed. Attempting to run newer, high-spec controllers on 110V power could lead to power supply instability, insufficient cooling performance, or the controllers failing to boot entirely.
Here is why the other options are incorrect:
Call support to schedule a power supply replacement (A): The issue is not a faulty power supply; it is the external electrical infrastructure's inability to provide the necessary voltage/wattage for the new hardware. Replacing the power supply with the same model would not solve the voltage limitation.
Transition the array to DC power (B): While Pure Storage does offer DC power options for specific telco environments, this is not a standard requirement for a typical controller upgrade. Moving to standard high-line AC power (220V) is the standard prerequisite for data center environments.
NEW QUESTION # 37
During testing of an NFS share, the administrator notes that they are able to mount the share as root but are not able to access files as root.
Where is the incorrect setting causing the issue located?
Answer: C
Explanation:
The Concept of Root Squash: In the world of NFS, "Root Squashing" is a fundamental security feature. By default, most modern storage systems (including FlashArray File Services) do not trust the "root" user of a remote client. This prevents a user with administrative access on a random laptop or server from gaining full administrative control over the files on the central storage.
Mounting vs. Accessing:
Mounting: This is the process of attaching the remote export to the local file system. If the Export Policy allows the client IP to connect, the mount will succeed.
Accessing: Once mounted, the array evaluates the identity of the user. If Root Squash is enabled, the array "squashes" the root user (UID 0) and maps it to a non-privileged user (usually nobody or anonymous). Consequently, the client's root user loses their administrative permissions when trying to read/write files.
The Export Policy Setting: The behavior described (able to mount but permission denied for files as root) is almost always caused by the User ID Mapping or Access rules within the Export Policy.
To resolve this, an administrator must edit the specific rule in the Export Policy and enable "No Root Squash" (or change the mapping to allow root access). This tells the FlashArray to honor the client's root identity.
Why Options A and B are incorrect:
Managed Directory: This is where you set the directory structure and quotas, but it doesn't control the protocol-level identity mapping.
File System: While a file system has underlying permissions, if the mount is successful but specifically blocks the root user, the "gatekeeper" is the Export Policy rule.
NEW QUESTION # 38
An application engineer reports seeing high latency in their application running in a VMware instance.
What is the best method to determine the source of the latency?
Answer: C
Explanation:
Within the Pure Storage ecosystem, the absolute best method to troubleshoot and pinpoint the exact source of VMware latency is to use VM Analytics (VM Topology) in Pure1.
VM Analytics is a feature built directly into Pure1 that maps the entire data path from the virtual machine all the way down to the physical FlashArray. It provides a visual topology map detailing the VM, Virtual Disk, ESXi Host, Datastore, and FlashArray Volume. By analyzing performance across this topology, an administrator can instantly identify exactly where the latency is being introduced. For example, you can clearly see if the latency spikes at the ESXi host layer (indicating compute contention) or the network layer, even if the FlashArray volume itself is reporting sub-millisecond latency at the storage level.
Here is why the other options are incorrect:
Analyze load metrics in Pure1 for each volume in the user's data path (C): Looking exclusively at volume-level metrics on the FlashArray will only tell you the latency from the array's perspective. If the latency is being caused by an overloaded ESXi host CPU or a saturated SAN fabric, the FlashArray metrics will look perfectly healthy, and you will fail to identify the source of the problem.
Analyze performance charts in vSphere for CPU, Memory, Network, and Storage Path for the user's data path (B): While vCenter performance charts are useful, they often lack deep storage-array-level context. Pure1's VM Topology is the "best" method because it correlates the vSphere stack data with the native FlashArray telemetry data in a single, unified view, making full-stack root cause analysis much faster.
NEW QUESTION # 39
What is the Pure Storage recommended Maximum Transmission Unit (MTU) size for the replication ports on a FlashArray?
Answer: A
Explanation:
Understanding MTU: The Maximum Transmission Unit (MTU) defines the largest size of a packet or frame that can be sent in a single network transaction. The standard Ethernet MTU is 1500 bytes. Anything larger than 1500 bytes is referred to as a Jumbo Frame.
Replication Efficiency: Replication involves moving large amounts of data between arrays. Using standard 1500-byte frames results in higher overhead because the CPU must process a larger number of headers for the same amount of data. By increasing the MTU, the FlashArray can pack more data into each frame, reducing CPU interrupts and improving overall throughput.
The Pure Recommendation: Pure Storage specifically recommends an MTU of 9000 for both iSCSI and Replication traffic. This is the industry standard for Jumbo Frames that balances efficiency with compatibility across most enterprise-grade switches.
Configuration Requirements: It is critical to remember that MTU must be configured end-to-end. For an MTU of 9000 to work on the replication ports:
The FlashArray replication ports must be set to 9000.
The network switches along the path (and any routers/ISLs) must support and be configured for at least 9000.
The target array's replication ports must also be set to 9000.
Why 9216 (Option A) is incorrect: While some switches support a "Baby Giant" or slightly larger MTU like 9216 to account for VLAN tagging overhead, Pure's internal and best practice documentation specifically points to 9000 as the standard setting for the array's interface.
NEW QUESTION # 40
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 # 41
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