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NEW QUESTION # 17
How is SAN Time measured?
- A. Average time, measured in milliseconds, that an I/O request spends in the array waiting to be served.
- B. Average time, measured in milliseconds, that an IO request spends waiting to synchronize to the peer array.
- C. Average time, measured in milliseconds, required to transfer data between the initiator and the array.
Answer: C
Explanation:
Understanding Total Latency: In a FlashArray environment, total latency as seen by the host application is the sum of several components. Pure Storage breaks this down into Array Time and SAN Time to help administrators pinpoint where performance bottlenecks exist.
SAN Time Definition: SAN Time represents the latency introduced by the network infrastructure between the host (initiator) and the FlashArray (target). This includes the time spent traveling across Fibre Channel or Ethernet switches, cables, and host bus adapters (HBAs). It is calculated by taking the total round-trip time measured by the host and subtracting the time the FlashArray spent processing the I/O.
Metric Breakdown: * Array Time: The time the FlashArray takes to process the I/O once it hits the front-end ports (Option C describes internal array time).
SAN Time: The transit time for the request to reach the array and the response to return to the host (Option A).
Wait Time: In ActiveCluster environments, there is also "Mirror Latency," which is the time spent synchronizing data to a peer array (Option B).
Troubleshooting Value: If a user reports high latency but the FlashArray GUI shows very low Array Time, the administrator can look at the SAN Time metric. A high SAN Time indicates an issue with the fabric, such as a failing SFP, a congested switch port, or oversubscribed ISLs (Inter-Switch Links).
NEW QUESTION # 18
What is the purpose of a Protocol Endpoint volume?
- A. It allows for volumes of the same name within host groups.
- B. It serves as a mount point for vVols.
- C. It is required to set Host Protocol.
Answer: B
Explanation:
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.
NEW QUESTION # 19
What is the Pure Storage recommended Maximum Transmission Unit (MTU) size for the replication ports on a FlashArray?
- A. 0
- B. 1
- C. 2
Answer: B
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 # 20
An administrator is attempting to add a volume to a volume group but it does not show up in the list of volumes available to move in, even though it does show up in the volumes pane.
Why is the volume missing?
- A. It is protected by SafeMode.
- B. It is already part of another volume group.
- C. It is already part of a Protection Group.
Answer: B
Explanation:
In the Pure Storage Purity operating environment, a volume can only be a member of one Volume Group at a time.
When an administrator navigates to a Volume Group in the GUI and clicks to add members, the system filters the inventory and only displays volumes that are currently "unassigned" (not belonging to any Volume Group). If a volume is already residing inside another Volume Group, Purity intentionally hides it from this available list to prevent conflicting overlapping memberships. To resolve this, the administrator must first navigate to the volume's current Volume Group, remove the volume from that group, and then it will become available to add to the new one.
Here is why the other options are incorrect:
It is already part of a Protection Group (B): Protection Groups (pgroups) manage snapshot and replication schedules. A volume can absolutely be a standalone member of a Protection Group while simultaneously being added to a Volume Group. Being in a pgroup does not hide it from the vgroup selection list.
It is protected by SafeMode (C): SafeMode is a ransomware protection feature that prevents the manual eradication of destroyed volumes and snapshots before their retention timer expires. It does not dictate or restrict logical organizational containers like Volume Groups.
NEW QUESTION # 21
What is the proper configuration method to connect a volume to multiple hosts?
- A. Connect the volume to each individual host.
- B. Connect the volume to a host group.
- C. Connect a volume group to the host.
Answer: B
Explanation:
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.
NEW QUESTION # 22
The SNMP protocol can be used to monitor what statistics of the array's performance?
- A. Latency, bandwidth, IOPS
- B. Available and used capacity
- C. Host and volume performance
Answer: A
Explanation:
SNMP Capabilities on FlashArray: Pure Storage FlashArrays support SNMP (Simple Network Management Protocol) versions v2c and v3. The primary use case for SNMP on the FlashArray is for integration with third-party monitoring tools (like SolarWinds, Nagios, or Zabbix) to provide a real-time health and performance heartbeat.
Performance Metrics (MIBs): The Pure Storage Management Information Base (MIB) specifically exposes high-level array performance metrics. These include the "Big Three" of storage performance: Latency (response time in microseconds), Bandwidth (throughput in bytes per second), and IOPS (I/O operations per second).
Scope of Monitoring: While the FlashArray GUI and CLI provide deep granularity (per host, per volume, or per pod), standard SNMP queries typically focus on array-wide performance and health status. Detailed "Host and volume performance" (Option B) is generally more effectively monitored via the Pure Storage REST API or the Pure1 VM Analytics, as SNMP is less efficient for pulling large tables of per-object data.
Capacity vs. Performance: While SNMP can report on capacity (Option C) through specific OIDs, the question specifically asks about performance statistics. In the context of Pure Storage monitoring documentation, the core performance metrics provided via SNMP traps and polling are latency, bandwidth, and IOPS.
NEW QUESTION # 23
A FlashArray is configured to use directory services. A user is a member of the groups associated with both Array Admin and Storage Admin.
What will the user experience when logging into the array?
- A. Storage Admin permissions
- B. Array Admin permissions
- C. Inability to login
Answer: B
Explanation:
On a Pure Storage FlashArray, Role-Based Access Control (RBAC) allows administrators to integrate with Directory Services (like Active Directory or OpenLDAP) to control user access. Purity uses a specific hierarchy for its administrative roles, which from highest to lowest privilege are: Array Admin, Storage Admin, Ops Admin, and Read Only.
When a user logs in and is found to be a member of multiple Active Directory or LDAP groups that are mapped to different roles on the FlashArray, Purity's behavior is designed to grant the user the highest level of permissions among those conflicting group mappings. Because the Array Admin role is higher in the hierarchy than the Storage Admin role, the user will successfully log in and be granted full Array Admin permissions.
Here is why the other options are incorrect:
Inability to login (A): Purity handles overlapping group memberships gracefully by defaulting to the highest privilege. It does not lock the user out or cause a login failure.
Storage Admin permissions (B): Because the system grants the highest available mapped privilege, the user will not be restricted to the lower-tier Storage Admin role when they also possess group membership for the Array Admin role.
NEW QUESTION # 24
The Load Meter in the Pure1 GUI shows a consistently high workload, averaging a 90% load over the past hour. The array also has high space usage of 85%.
What is the expected result?
- A. The FlashArray will limit Space Reclamation and Space Reporting on array.
- B. The FlashArray will use QoS to limit impact of incoming IO to verify system processes are functioning for health of array.
- C. The FlashArray will prioritize Space Reclamation so array does not exceed 90% full.
Answer: B
Explanation:
Understanding the Load Meter: The Load Meter in Pure1 and Purity represents the percentage of the array's performance capacity currently being utilized. It takes into account CPU cycles, back-end metadata processing, and front-end I/O. A 90% load means the controllers are nearly saturated.
The Impact of Capacity on Load: As a FlashArray fills up (specifically beyond 80%), the Purity Operating Environment must work harder to find and organize free space. This "Garbage Collection" (GC) process becomes more intensive, which consumes more controller resources and contributes to a higher Load Meter reading.
Internal System QoS: To ensure the stability and integrity of the storage, Pure Storage uses Internal Quality of Service (QoS). This is an "always-on" feature that prioritizes critical system processes (like metadata updates, internal health checks, and data protection) over incoming host I/O during periods of extreme resource contention.
Graceful Performance Pacing: When the load is consistently high (like the 90% described), Purity may introduce small amounts of latency to the host I/O (often seen as "Wait" or "Queue" time) to "pace" the workload. This prevents the controllers from reaching a 100% "locked" state, ensuring the array remains responsive and healthy even under heavy pressure.
Why Option C is incorrect: While the array needs to reclaim space, prioritizing Space Reclamation (a background task) during a 90% performance load would likely push the controllers to 100% load, causing significant latency spikes or instability for the host. The system must balance reclamation with active production I/O.
NEW QUESTION # 25
What happens when you demote the original source pod?
- A. Replication is paused.
- B. Replication is reversed.
- C. It saves a temporary copy of the source pod content in the eradication bin.
Answer: B
Explanation:
ActiveCluster and Pod Roles: In a Pure Storage ActiveCluster or ActiveDR environment, a Pod is a management container for volumes. To move workloads or perform a planned failover between two arrays, you use the Promote and Demote commands.
The Reversal Process: When you have two pods in a replication relationship (Source and Target), data flows from the Promoted (Active/Source) pod to the Demoted (Passive/Target) pod.
When you Demote the current source, it transitions from a "read-write" state to a "read-only" (passive) state.
If the other pod in the pair is then Promoted, Purity automatically intelligently reverses the direction of replication. The array that was previously receiving data now begins sending incremental updates back to the original source.
Continuous Protection: This design ensures that you don't have to manually tear down and recreate replication schedules every time you switch production sites. The system tracks the metadata changes and ensures that only the delta (changed blocks) are sent in the new direction.
Why Option C is incorrect: If replication were simply paused, the two sites would quickly drift out of sync, making it impossible to fail back without a full baseline resync.
Why Option A is incorrect: Demoting a pod does not delete any data; it simply changes the access characteristics and replication role. The data remains fully intact on the storage media.
NEW QUESTION # 26
An administrator needs a comparison of FA File performance across multiple arrays.
What Pure1 Manage report will provide the best results?
- A. Array Performance
- B. File Systems Performance
- C. Overview Dashboard
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 # 27
A FlashArray administrator is configuring new hosts. There is an option in the personality settings for the target OS.
When is the best time to configure the personality for a host in Purity?
- A. Host personalities can be configured at anytime except for the ESXi operating system.
- B. After the host has been created and volumes are connected to the host.
- C. When a host is initially created and before volumes are connected to the host.
Answer: C
Explanation:
Definition of Host Personality: In Purity//FA, a Host Personality is a setting applied to a host object that modifies how the FlashArray communicates with that specific initiator. It ensures the array sends the correct SCSI responses that the target Operating System (OS) expects. Common personalities include ESXi, AIX, HP-UX, and Hitachi-VSP.
The Importance of Timing: The best practice is to set the personality during the host creation phase, before any volumes are attached or I/O has commenced. This ensures that from the very first "Inquiry" command sent by the host, the FlashArray responds with the appropriate settings (such as specific VAAI primitives for ESXi or specific ALUA behaviors for other Unix variants).
Risks of Changing Later: While Purity allows you to change a host personality later, doing so while volumes are connected and I/O is active can be disruptive. For many operating systems, a change in personality requires the host to be rebooted or the storage paths to be "rescanned" to recognize the change in device capabilities.
Default Behavior: If no personality is selected, the FlashArray uses a "Generic" personality suitable for standard Windows and Linux distributions. However, for specialized hypervisors like ESXi, failing to set the personality correctly from the start can lead to performance issues or lack of support for hardware acceleration features.
Why Option C is incorrect: Changing the personality after volumes are connected is reactive rather than proactive. It increases the risk of the host misinterpreting the storage device's capabilities, potentially leading to mount failures or path instability.
NEW QUESTION # 28
What is unified storage for Pure?
- A. FlashArray runs both iSCSI and Fibre Channel (FC) protocols.
- B. FlashArray runs both Block and File level protocols.
- C. FlashArray runs both NFS and SMB protocols.
Answer: B
Explanation:
Definition of Unified Storage: In the storage industry, "Unified Storage" refers to a platform that can natively serve both Block-level storage (accessed via protocols like Fibre Channel, iSCSI, or NVMe-oF) and File-level storage (accessed via protocols like NFS or SMB) from a single pool of capacity and under a single management interface.
Pure Storage Implementation (FA File): Pure Storage achieved unified storage on the FlashArray through the introduction of Purity//FA File Services. Unlike traditional unified storage that often required a "gateway" or separate hardware "heads," Pure's implementation runs natively on the FlashArray controllers.
Shared Resources: On a unified FlashArray, the global storage pool is shared between volumes (Block) and file systems (File). All of Pure's core data services-such as deduplication, compression, and SafeMode snapshots-apply globally across both block and file data.
Protocol Diversity: While Option A mentions NFS and SMB, those are strictly File protocols. Option C mentions iSCSI and FC, which are strictly Block protocols. Only Option B correctly identifies the combination of Block and File, which defines the "Unified" architecture of the FlashArray.
NEW QUESTION # 29
An administrator is running commands to verify NVME/TCP connectivity from the hosts to the FlashArray. They use the command ping -M do -s 8972 <ip_addr> from the initiator and it fails.
What should the administrator do to resolve the issue?
- A. Run the command from the target.
- B. Check the MTU of 9000 is set on each hop to the FA.
- C. Engage support to enable NVME/ TCP services.
Answer: B
Explanation:
When configuring NVMe/TCP (or iSCSI) for optimal performance on a Pure Storage FlashArray, configuring Jumbo Frames (an MTU of 9000) end-to-end is a standard best practice.
The command ping -M do -s 8972 <ip_addr> is specifically used to verify Jumbo Frame configuration across the network.
The -M do flag sets the "Do Not Fragment" (DF) bit, meaning the network is not allowed to break the packet into smaller pieces.
The -s 8972 flag sets the ICMP data payload to 8972 bytes. When you add the standard 8-byte ICMP header and the 20-byte IP header, the total packet size equals exactly 9000 bytes.
If this ping command fails, it indicates that somewhere along the network path between the host (initiator) and the FlashArray (target), a switch port, router, or network interface is not configured to support an MTU of 9000. The packet is being dropped because it is too large and cannot be fragmented. The administrator must verify the MTU settings on every network hop (switches, routers, and host NICs) to resolve the issue.
Here is why the other options are incorrect:
Engage support to enable NVME/ TCP services (A): The failure of a Jumbo Frame ping test is a Layer 2/Layer 3 network configuration issue, not an indicator that the NVMe/TCP storage protocol service is disabled on the array.
Run the command from the target (C): While pinging from the FlashArray back to the host is a valid secondary troubleshooting step, it will likely also fail if the network path doesn't support Jumbo Frames. The actual resolution is to fix the MTU on the network hops.
NEW QUESTION # 30
What does an asynchronous blackout window prevent?
- A. New replication transfers that started before the blackout window.
- B. In progress transfers that started before the blackout window.
- C. New replication transfers from starting during the blackout window.
Answer: C
Explanation:
Definition of a Blackout Window: In Purity//FA, a Blackout Window is a scheduled period during which asynchronous replication is suspended. This is typically used by administrators to preserve WAN bandwidth during peak business hours or to prevent replication traffic from competing with high-priority local workloads (like a massive database batch job).
The "In-Progress" Rule: One of the most important characteristics of a blackout window is that it is non-disruptive to active transfers. If a replication job started at 7:55 AM and the blackout window begins at 8:00 AM, Purity will allow that specific transfer to continue until it finishes.
The Prevention Mechanism: Once the clock hits the start of the blackout window, the replication scheduler is effectively "paused." No new snapshots will be queued for transfer, and no new replication sessions will be initiated until the window expires.
Why Option A is incorrect: Purity does not kill active transfers. Abruptly stopping a transfer would waste the bandwidth already consumed and require the entire delta-set to be re-calculated or re-sent later.
Why Option B is incorrect: The phrasing is logically inconsistent; you cannot prevent something that "started before" the window from being "new" during the window.
Best Practice: When configuring blackout windows, ensure that the "clear" time (the time between windows) is long enough to allow the array to catch up on the snapshots that were queued during the blackout, otherwise, you risk triggering Alert 51 (Replication Delayed).
NEW QUESTION # 31
Where can a snapshot be copied out to?
- A. A new volume or existing volume
- B. A new volume or new Snapshot
- C. An existing volume or new Snapshot
Answer: A
Explanation:
On a Pure Storage FlashArray, volume snapshots are immutable, read-only, point-in-time representations of your data. Because they cannot be attached directly to a host to be read or modified, you must use the Copy function to make the data usable.
The Purity operating environment allows you to copy a snapshot to two specific destinations:
A new volume: This effectively creates a clone. It provisions a brand-new, writable volume using the exact data footprint of the snapshot. This is incredibly useful for test/dev environments, offline reporting, or granular file recovery where you don't want to disrupt the original production volume.
An existing volume: This takes the data from the snapshot and completely overwrites the target volume. This is the standard procedure when you need to perform a full rollback of a corrupted volume, or when you want to quickly refresh a lower-level environment (like refreshing a QA database with yesterday's Production snapshot).
Here is why the other options are incorrect:
A new Snapshot (B & C): You cannot directly "copy" a snapshot to create another standalone snapshot. Snapshots are uniquely generated from active volumes. If you wanted to duplicate a snapshot's exact state, you would first copy it to a volume, and then take a new snapshot of that resulting volume.
NEW QUESTION # 32
If an NFS client can mount the FA File export shares with the IP address, but not the fully qualified domain name, what is most likely causing the issue?
- A. Issue with the Active Directory (AD) controller
- B. Issue with the OpenLDAP
- C. Issue with the DNS
Answer: C
Explanation:
When an NFS client successfully mounts an export using the target's IP address, it proves that the fundamental network connectivity (routing, firewalls) and the storage protocol layer (NFS export policies, host access permissions) are functioning correctly.
However, if the exact same mount attempt fails when using the Fully Qualified Domain Name (FQDN) of the FlashArray file service, the issue lies entirely with name resolution. The Domain Name System (DNS) is responsible for translating human-readable FQDNs into the IP addresses required for network communication. If the client cannot reach the DNS server, or if the DNS server lacks the correct A or AAAA records for the FlashArray's file Virtual IP (VIP) addresses, the client won't be able to resolve the name to the IP, causing the mount command to fail.
Here is why the other options are incorrect:
Issue with the Active Directory (AD) controller (A): Active Directory is primarily used for directory services, user authentication, and authorization (such as mapping permissions for SMB or NFSv4). While AD environments usually include DNS, an "AD controller issue" in the context of storage protocols usually points to permission denials, not host name resolution failures. Furthermore, since the mount works via IP, basic access is already validated.
Issue with the OpenLDAP (C): Similar to AD, OpenLDAP provides directory services for user mappings (UID/GID) and authentication. It does not perform FQDN-to-IP resolution.
NEW QUESTION # 33
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