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>> Reliable FlashArray-Storage-Professional Test Answers <<
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NEW QUESTION # 17
In Pure Protect //DRaaS, the administrator modified the business policy used for backups, reducing the "DR Retention" from 7 days to 3 days. The DR target environment currently has 7 days of backups.
What will occur?
Answer: B
Explanation:
Policy-Driven Automation: Pure Protect //DRaaS (Disaster Recovery as a Service) is built on a declarative policy engine. When you define a business policy (Protection Group or similar policy-based management), the system's primary goal is to bring the environment into compliance with the "Desired State" defined by that policy.
Retention Enforcement: When the retention period is reduced (e.g., from 7 days down to 3 days), the Purity/Pure Protect engine identifies that any existing snapshots or backups older than the new 3-day threshold are now "out of policy." Immediate Reclamation: Unlike some legacy backup systems that only apply new retention settings to future backups, Pure Storage's policy-driven architecture typically triggers an immediate cleanup of the now-obsolete data to reclaim space on the target. This ensures the environment matches the modified policy requirements immediately upon the policy update.
SafeMode Considerations: If SafeMode is enabled on the target, these "erased" backups will actually move into the "Destroyed" (but not yet eradicated) bucket for the duration of the SafeMode timer, providing a safety net against accidental policy changes or malicious deletions. However, from the perspective of the active DR policy, they are removed.
NEW QUESTION # 18
Refer to the exhibit:
What is the most likely cause of system space in this capacity graph?
Answer: C
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 # 19
A storage administrator is tasked with providing real-time data and alerts to the Network Operations Center (NOC) dashboard.
What source should the information come from to provide real-time data?
Answer: C
Explanation:
To provide true real-time data and alerts directly to a Network Operations Center (NOC) dashboard, the information must be sourced directly from the FlashArray. The FlashArray's Purity operating environment natively supports real-time data streaming and alerting integrations via protocols like Syslog, SNMP traps, and the local REST API. Polling the array directly or configuring it to push alerts guarantees that the NOC receives instantaneous, up-to-the-second notifications regarding array health, hardware faults, and performance metrics.
Here is why the other options are incorrect:
Pure1 (B): While Pure1 is Pure Storage's powerful, cloud-based monitoring and predictive analytics platform, it relies on phone-home telemetry data. This telemetry is batched and transmitted from the array to the Pure1 cloud on a short polling interval (typically a few minutes). Because of this transmission and processing interval, Pure1 provides near-real-time (lagging by a few minutes) and historical data. It is excellent for global fleet management and predictive support, but not for instantaneous, zero-latency NOC alerting.
Pure Performance Monitoring (A): This is a distractor. There is no standalone product or specific protocol in the Pure Storage ecosystem officially named "Pure Performance Monitoring." Performance monitoring is simply a feature accessed via the FlashArray GUI/CLI or the Pure1 platform.
NEW QUESTION # 20
A customer is managing a VMware environment and has recently copied a snapshot from a Pure Storage array to a new volume. When attempting to mount this volume on a VMware virtual machine, the operation fails.
How should this be resolved?
Answer: C
Explanation:
VMFS UUID Conflict: When you create a volume from a snapshot on a FlashArray, the data is a block-for-block copy of the original. This includes the VMFS metadata and the unique identifier (UUID) of the datastore.
ESXi Protection Mechanism: When an ESXi host sees a volume that contains a VMFS signature identical to one already mounted (or one it has seen before but on a different device ID), it flags the volume as a "snapshot." To prevent data corruption or VM identity conflicts, VMware will not automatically mount this "duplicate" volume.
The Resignaturing Process: By choosing to Resignature the volume (via the "Mount Datastore" wizard in vCenter or the ESXi CLI), VMware assigns a new, unique UUID to the VMFS volume. This allows the host to treat it as a distinct, independent datastore.
Why Option B is incorrect: Reformatting the volume would indeed allow it to be mounted, but it would destroy all the data you just copied from the snapshot, defeating the purpose of the operation.
Why Option C is incorrect: While there are advanced settings in VMware (like LVM.enableResignature), they don't solve the issue of the operation "failing" during a standard mount attempt; they simply change how the host behaves. Resignaturing is the standard, safe, and recommended workflow for mounting snapshot copies in a VMware environment.
NEW QUESTION # 21
In reviewing space metrics via the Pure Management GUI, a storage manager notices the total reduction rate is much higher than the Data Reduction Rate (DRR).
What is the reason for this?
Answer: C
Explanation:
Understanding Data Reduction Rate (DRR): DRR is a measure of the effectiveness of Purity's deduplication and compression algorithms. It compares the amount of data written by the host to the amount of physical space actually occupied on the flash media after these processes have occurred.
Calculation: $\text{DRR} = (\text{Deduplication} \times \text{Compression})$.
Understanding Total Reduction: The Total Reduction metric is a broader "efficiency" value. It represents the ratio of the Total Provisioned (logical) space to the Physical space used.
The "Thin Provisioning" Factor: The primary difference between these two numbers is Thin Provisioning.
FlashArrays are 100% thin-provisioned by default. If a customer creates a 100TB volume but the host only writes 1TB of data, the "Total Reduction" will be massive because it counts all that unwritten, "virtual" space as "saved." The DRR, however, only looks at the 1TB that was actually written and calculates how well it was compressed and deduped.
Why Option C is incorrect: Both metrics generally account for the efficiency of snapshots. However, snapshots contribute to DRR through deduplication (since they share blocks with the source volume). The massive gap between DRR and Total Reduction is almost always mathematically attributed to the "unwritten" space provided by thin provisioning.
Key Takeaway: If your DRR is 5-to-1 but your Total Reduction is 50-to-1, it means your data is compressing/deduping well, but you have also provisioned a significant amount of volume space that hasn't been written to yet.
NEW QUESTION # 22
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