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>> FlashArray-Storage-Professional専門知識 <<
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質問 # 37
What method is recommended for monitoring an array with 3rd party tools such as Prometheus and SolarWinds?
正解：A
解説：
Modern Monitoring Standards: Pure Storage has built its management ecosystem around the REST API. While traditional methods like SNMP and Syslog are supported for basic health alerts, the REST API provides the depth of data (granularity) and the performance required for modern observability platforms like Prometheus, SolarWinds, and Grafana.
The Pure Storage Exporter: For tools like Prometheus, Pure Storage provides an official "Pure Exporter." This exporter acts as a bridge; it queries the FlashArray via the REST API to gather real-time metrics (latency, bandwidth, IOPS, capacity) and converts them into the format Prometheus understands.
SolarWinds Integration: SolarWinds utilizes the Pure Storage REST API to pull performance and health data into its storage monitoring modules. This allows for deep-dive historical analysis that exceeds the capabilities of simple SNMP traps.
Why SMI-S (Option B) is incorrect: SMI-S (Storage Management Initiative Specification) is a legacy industry standard that is largely deprecated in favor of RESTful interfaces. Pure Storage does not focus on SMI-S for modern third-party tool integration.
Why SYSLOG (Option C) is incorrect: Syslog is excellent for Event Logging (e.g., "User Logged In," "Volume Deleted"), but it is a poor choice for Performance Monitoring. You cannot effectively graph IOPS or bandwidth trends using Syslog streams alone.
質問 # 38
What is the purpose of a Protocol Endpoint volume?
正解：B
解説：
In a VMware vSphere environment utilizing Virtual Volumes (vVols), a Protocol Endpoint (PE) acts as a crucial logical proxy or I/O access point between the ESXi hosts and the storage array.
Unlike traditional VMFS datastores where the host mounts a massive LUN and places all VM files inside it, vVols map individual virtual machine disks directly to native volumes on the FlashArray. Because a single ESXi host could potentially need to communicate with thousands of individual vVol volumes, it would be extremely inefficient to map every single one directly to the host. Instead, the ESXi host mounts the Protocol Endpoint, and the storage array uses this PE to dynamically route the I/O to the correct underlying vVol. On a Pure Storage FlashArray, creating and connecting a PE volume to your ESXi host groups is a mandatory prerequisite for setting up a vVol datastore.
Here is why the other options are incorrect:
It allows for volumes of the same name within host groups (A): Purity OS requires all volume names across the entire FlashArray to be completely unique, regardless of which host group they are connected to or whether a Protocol Endpoint is in use.
It is required to set Host Protocol (C): The host communication protocol (such as iSCSI, Fibre Channel, or NVMe-oF) is determined by the physical host bus adapters (HBAs), network interface cards (NICs), and the configuration of the Host object in Purity, not by the creation of a volume type like a PE.
質問 # 39
Pure Protect //DRaaS is configured with a Business Policy to back up data to AWS. An administrator, with DRaaS Global Admin access, is trying to delete the policy but is unable to do so.
What is restricting the administrator from deleting the policy?
正解：C
解説：
In policy-driven data protection and disaster recovery architectures like Pure Protect //DRaaS, a "Business Policy" dictates the critical Service Level Agreements (SLAs) for your environment, such as your Recovery Point Objective (RPO), replication frequency, and retention schedules. These policies are then assigned to "Application Groups," which act as logical containers for the specific virtual machines being protected and replicated to AWS.
As a fundamental safety mechanism built into the platform to prevent accidental exposure and SLA breaches, the system places a hard dependency lock on actively used policies. An administrator cannot delete a Business Policy if there are still Application Groups actively relying on it for their DR scheduling. To successfully delete the policy, the administrator must first modify all associated Application Groups and assign them to a different Business Policy, or completely remove the protection from those groups.
Here is why the other options are incorrect:
The administrator also needs DRaaS Cloud Admin access (C): The scenario explicitly states the user already has "DRaaS Global Admin access." In the Pure Protect //DRaaS Role-Based Access Control (RBAC) model, Global Admin is the highest tier of privilege and has full rights to manage and delete policies. A lack of permissions is not the issue here.
The Business Policy is marked as the Primary Policy (B): While a policy might be a default or primary template, the actual hard restriction that prevents deletion in the software is active resource assignment (the Application Groups), not just a "Primary" label.
質問 # 40
What is the best practice for configuring VMFS UNMAP for ESXi 6.7 or later?
正解：B
解説：
What is UNMAP?: UNMAP (SCSI command 0x42) is the mechanism that allows a host (like ESXi) to inform the storage array that specific blocks of data are no longer in use (e.g., after a VM is deleted or moved). This is critical for Pure Storage because it allows the array to reclaim that space and maintain high data reduction ratios.
Evolution in ESXi: In versions prior to 6.5, UNMAP was a manual process executed via the CLI. Starting with ESXi 6.7, VMware introduced Automatic Space Reclamation, which runs in the background.
The Pure Storage Recommendation: Pure Storage recommends setting the reclamation priority to Auto with Low Priority.
Low Priority: This ensures that the UNMAP commands are sent to the FlashArray at a steady, manageable rate (roughly up to 25 MB/s to 100 MB/s depending on the Purity version). Because FlashArrays are built on a high-performance metadata engine, "Low Priority" is more than sufficient to keep up with even high-churn environments without causing any contention for active application I/O.
Why avoid High Priority (Option B)?: Setting it to high priority or using a fixed high-burst rate can lead to "bursty" SCSI traffic. While the FlashArray can handle the load, it is considered a best practice to keep background maintenance tasks like space reclamation at a lower priority to ensure the "Big Three" (latency, bandwidth, IOPS) for production workloads remain optimized.
Verification: You can verify that UNMAP is working by looking at the Data Reduction metrics in the Purity GUI or Pure1. If the "Thin Provisioning" or "Reclaimed" numbers are increasing after file deletions, the host is correctly communicating its freed space to the array.
質問 # 41
What is the proper configuration method to connect a volume to multiple hosts?
正解：B
解説：
In Pure Storage Purity OS, the absolute best practice and proper configuration method for sharing a single volume across multiple hosts-such as a VMware ESXi cluster or a Microsoft Windows Server Failover Cluster (WSFC)-is to connect the volume to a Host Group.
When you create a Host Group, you add the individual Host objects (which contain the WWPNs, IQNs, or NQNs) into that group. When a volume is then connected to the Host Group, Purity automatically ensures that the volume is presented to every host in that group using the exact same LUN ID. Consistent LUN IDs across all nodes in a cluster are a strict requirement for clustered file systems like VMFS and Cluster Shared Volumes (CSV) to function correctly and prevent data corruption.
Here is why the other options are incorrect:
Connect the volume to each individual host (C): This is known as creating "private connections." If you manually connect a shared volume to multiple hosts individually, Purity might assign a different LUN ID to the volume for each host. Inconsistent LUN IDs will cause clustered operating systems to fail to recognize the disk as a shared resource. Private connections should only be used for boot LUNs or standalone standalone servers.
Connect a volume group to the host (B): In Purity, a "Volume Group" is a logical container used for applying consistent snapshot policies, replication schedules, or ActiveCluster configurations to a set of related volumes (like a database and its log files). Volume groups are not used for host presentation or access control.
質問 # 42
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