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NEW QUESTION # 24
An Implementation Engineer is scheduled to install a FlashArray and a DirectFlash Shelf (DFS).
What action should the Implementation Engineer perform?
- A. Only upgrade the Purity on the FlashArray and then attach the DFS.
- B. Install the Array and DFS with the Purity that shipped and have Support upgrade remotely.
- C. Refer to the "Recommended DFS Versions for Purity Releases" KB and upgrade Purity on the FlashArray and DFS.
Answer: C
Explanation:
To ensure compatibility and optimal performance, the Implementation Engineer should consult the recommended DFS versions for the installed Purity release and upgrade both the FlashArray and DirectFlash Shelf accordingly.
NEW QUESTION # 25
What hardware should the Implementation Engineer find in the upgrade kit in order to perform an //X to //XL NDU?
- A. 4 QSFP cables / 2 Mellanox cards / 20 DFMDs
- B. 2 QSFP cables / 3 Mellanox cards / 20 DFMDs
- C. 3 QSFP cables / 4 Mellanox cards / 10 DFMDs
Answer: A
Explanation:
For a Non-Disruptive Upgrade (NDU) from a FlashArray//X to a FlashArray//XL, the upgrade kit typically contains 4 QSFP cables, 2 Mellanox cards, and 20 DFMD blanks (or modules).
2 Mellanox Cards: The FlashArray//X (source) likely requires the installation of 100GbE RoCE adapters (Mellanox) into its controllers to establish the high-speed replication link with the new FlashArray//XL (which has 100GbE native). One card is installed per //X controller.
4 QSFP Cables: To ensure a redundant, high-bandwidth connection between the two arrays during the data migration phase, 2 cables are used per controller pair (CT0-to-CT0 and CT1-to-CT1), totaling 4 cables.
20 DFMDs (Blanks/Fillers): The FlashArray//X typically holds 20 DirectFlash Modules. The FlashArray//XL chassis has 40 slots. When the 20 data drives are physically moved from the //X to the //XL, the //XL will still have 20 empty slots. These must be filled with DirectFlash blanking modules (DFMD blanks) to maintain proper chassis airflow and thermal pressure. Thus, the kit includes these 20 fillers.
NEW QUESTION # 26
An Implementation Engineer performing an inventory of hardware for an NDU from an FlashArray//X70R2 to an FlashArray //X90R3 and discovers a complete FlashArray//X90R3 was shipped in place of an NDU kit.
What is the minimum hardware the Implementation Engineer should use from this array to complete the NDU?
- A. Controller and power supplies
- B. Controllers
- C. Controller and NVRAM
Answer: C
Explanation:
To complete the Non-Disruptive Upgrade (NDU) from an //X70R2 to an //X90R3 using a fully shipped array, the Implementation Engineer must extract and use the Controllers and NVRAM modules .
* Stateless Architecture: The FlashArray upgrade philosophy allows the chassis and data drives (Data Packs) to remain in place while the compute (controllers) and cache (NVRAM) are swapped.
* Component Compatibility:
* Controllers: The X90R3 controllers provide the upgraded CPU/performance required.
* NVRAM: The NVRAM modules (located in the chassis front or rear slots depending on generation, but logically paired with controller performance) often differ between generations (R2 vs. R3) and performance tiers (70 vs. 90). The X70R2 NVRAM modules are typically not compatible with X90R3 controllers. Therefore, the engineer must swap the NVRAM modules along with the controllers to ensure the write cache is recognized.
* Power Supplies: Both the X70R2 and X90R3 utilize the same high-capacity 1600W Power Supply Units . Unless the existing PSUs are faulty, they do not technically need to be swapped for the system to function, making "Controller and NVRAM" the precise minimum requirement for the logic upgrade.
NEW QUESTION # 27
Before starting the HWNDU, the Implementation Engineer discovers that DirectFlash Shelf SH9 is incorrectly cabled to CT0.
What should the Implementation Engineer do?
- A. Fix the cabling during the CT0 replacement.
- B. Reschedule the HWNDU until a plan to fix the cabling is ready.
- C. Proceed with the HWNDU and fix the cable after the upgrade.
- D. Disconnect the shelf immediately to prevent data corruption.
Answer: A
Explanation:
During the preparatory phases of a FlashArray Hardware Non-Disruptive Upgrade (HWNDU), validating physical connectivity is a strict prerequisite. If an Implementation Engineer discovers that a DirectFlash Shelf (like SH9) is incorrectly cabled to CT0, the safest and most efficient remediation is to correct the cabling precisely during the physical replacement of that specific controller.
Option A (proceeding and fixing it after) is perilous because leaving the improper cabling in place could compromise backend redundancy when the partner controller assumes the full I/O load, potentially leading to a multi-pathing failure or data unavailability event during the NDU. Option B (rescheduling the entire upgrade) is an unnecessary overreaction that wastes time and resources, as the upgrade procedure itself provides the perfect window for correction.
When the Implementation Engineer initiates the failover and successfully takes CT0 offline to swap the hardware, all active I/O is safely routed through CT1. Because CT0 is completely powered down and physically isolated from the data path at this stage, the engineer can safely disconnect the miswired SAS or NVMe-oF cables and re-cable them correctly into the new CT0 hardware according to the official Pure Storage cabling matrix. This method ensures maximum redundancy is restored the moment the new controller boots, seamlessly resolving the issue without introducing any additional maintenance windows or risks.
NEW QUESTION # 28
An Implementation Engineer is onsite to install a new DFM data pack (DP) to CH0.BAY10-CH0.BAY19 of a FlashArray.
After adding the drives to the chassis, which command should the Implementation Engineer run to verify if the new DP is in a wide write group?
- A. puredb list drives
- B. puredrive list --pack CH0.BAY10
- C. find_drive.py
Answer: B
Explanation:
The puredrive list --pack command shows detailed information about the specified data pack, including whether its drives are part of a wide write group.
NEW QUESTION # 29
An Implementation Engineer is beginning a controller upgrade. Which command should be run to stop Purity?
- A. pureadm stop --controller CT0
- B. pureadm stop
- C. pureadm stop --secondary
Answer: A
Explanation:
The command pureadm stop --controller CT0 specifically stops Purity on the designated controller (CT0), which is the correct step to safely begin a controller upgrade.
NEW QUESTION # 30
In a situation where iSCSI cards need to be re-used during a controller upgrade, which is a valid transfer path?
- A. XR2 > XR3
- B. M > XR2/3
- C. M > XR2
Answer: A
Explanation:
A valid transfer path for re-using iSCSI cards during a controller upgrade is from a FlashArray//XR2 to a FlashArray//XR3 (Option A).
Hardware Continuity: The FlashArray//XR2 and //XR3 generations share a high degree of physical component compatibility, particularly regarding PCIe form factors and supported interface cards.
Upgrade Workflow: When performing an "Intra-Series" upgrade (refreshing just the controllers from R2 to R3 to gain CPU performance), the existing I/O cards (Fibre Channel or iSCSI) from the R2 chassis can typically be transferred directly into the new R3 controllers.
Legacy Limitations: Migrating cards from a much older FlashArray//M (Option B or C) is generally restricted. The //M series often used older generation PCIe cards or different form factors (like onboard risers) that are not validated or physically compatible with the modern PCIe slots found in the //X series. Therefore, for //M to //X upgrades, new I/O cards are usually required, whereas R2 > R3 supports reuse.
NEW QUESTION # 31
Which PCIe slot supports 4-port FC cards on FlashArray//XL?
- A. 0
- B. 1
- C. 2
Answer: A
Explanation:
On FlashArray//XL, the PCIe slot 8 supports installation of 4-port Fibre Channel cards, allowing higher port density for SAN connectivity.
NEW QUESTION # 32
If drives need to be relocated within an array for an XFORM upgrade, when should this be completed?
- A. After upgrade is completed
- B. During the upgrade
- C. The following day
Answer: A
Explanation:
If physical drives need to be relocated within the array (e.g., rebalancing shelves or moving packs to specific slots to match the target configuration) as part of an XFORM (Data-in-Place) upgrade, this task should be completed after the upgrade is completed.
Risk Management: The primary objective during the upgrade window is to successfully transition the controllers and software to the new generation (e.g., SAS to NVMe, or //M to //X) while maintaining data availability. Introducing unnecessary physical changes-like moving drives between slots-during the active controller swap adds variables and risk to the critical path.
Procedure: The standard workflow involves:
Perform the Controller Upgrade (XFORM).
Verify the new system is stable, healthy, and handling I/O correctly.
Post-Upgrade: Once the system is stable, the Implementation Engineer performs the physical drive relocation (if required) to optimize the layout or consolidate shelves. This ensures that if any issues arise from the drive movement, they are isolated from the controller upgrade process, making troubleshooting significantly easier and safer.
NEW QUESTION # 33
When using FA File, where can the Implementation Engineer manage directories?
- A. Analytics > Performance > Directories
- B. Settings > Access > Directory Services
- C. Storage > File Systems
Answer: C
Explanation:
In the Purity//FA Graphical User Interface (GUI), the management of FA File resources is integrated into the core "Storage" navigation pane. To manage specific file system directories-such as creating new exports, setting quotas, or managing directory-level policies-the Implementation Engineer must navigate to Storage > File Systems .
Within this view, the engineer can see the list of provisioned file systems. By clicking into a specific file system, they can access the "Directories" sub-tab or detailed view where folders (directories) within that file system can be explicitly managed.
It is important not to confuse this with "Directory Services," which is located under the Settings menu.
"Directory Services" (Option B) refers to the configuration of Active Directory (AD) or LDAP connections for user authentication and identity mapping, not the management of the actual file storage structure.
Similarly, the Analytics tab (Option C) provides performance metrics but does not offer configuration capabilities for creating or modifying directories.
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NEW QUESTION # 34
An Implementation Engineer runs check start validate-array-health before starting a FlashArray//X70R3 to FlashArray//X70R5 HWNDU and receives code 60 alert indicating an unhealthy NVRAM module in CH0.
NVB1. What action Should the Implementation Engineer take to resolve this?
- A. Proceed with the HWNDU, the //X70 model has a four NVRAM configuration so the array still has redundancy.
- B. Disable the unhealthy NVRAM module and proceed With HWNDU after confirming there is no degraded data.
- C. Reseat the unhealthy NVRAM module, and then verify it is in a healthy status prior to proceeding with the HWNDU.
Answer: C
Explanation:
Hardware Non-Disruptive Upgrades (HWNDU) rely strictly on the array being in a fully healthy state before the process begins. The validate-array-health check is designed to gate the upgrade if any component that provides redundancy or data integrity is compromised. NVRAM (Non-Volatile Random Access Memory) modules are critical components in the FlashArray architecture; they store in-flight write data to ensure it is persistent before being destaged to flash.
A "Code 60" alert specifically points to a hardware issue with an NVRAM module. While the //X70 model indeed has redundancy (often using multiple NVRAM modules), proceeding with an upgrade while one is degraded puts the array at risk. During an NDU, controllers reboot and failover; running on reduced redundancy during these critical operations is not supported and is blocked by the health checks.
The correct first step for an Implementation Engineer is to attempt to reseat the unhealthy NVRAM module
. Often, connection issues or transient seating faults can trigger these alerts. After reseating, the engineer must run the health check again to confirm the module status has returned to "healthy." If the module remains unhealthy after reseating, it must be replaced before the upgrade can proceed. You cannot simply disable it or ignore it, as the upgrade script will likely refuse to continue to protect data integrity.
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NEW QUESTION # 35
An Implementation Engineer is onsite to install a new DFM data pack (DP) to CH0.BAY10-CH0.BAY19 of a FlashArray. After adding the drives to the chassis, which command should the Implementation Engineer run to verify if the new DP is in a wide write group?
- A. puredb list drives
- B. puredrive list --pack CH0.BAY10
- C. find_drive.py
Answer: B
Explanation:
To verify the status, presence, and admission of a specific data pack, the correct command is puredrive list -- pack CH0.BAY10 .
In the context of FlashArray geometry, a "Write Group" (RAID set) is formed by combining DirectFlash Modules. A "Wide Write Group" typically consists of 10 modules (a full data pack). When an engineer installs a standard 10-pack of drives (Bays 10-19), verifying that all 10 drives are successfully recognized and
"admitted" confirms that the system has formed the intended wide write group.
The puredrive list command with the --pack argument filters the output to show only the drives in that specific pack. The engineer checks that all 10 drives are listed and their status is "healthy" or "admitted" . If fewer drives were admitted (e.g., only 5), it would indicate a "narrow" write group or a hardware issue.
* Option A (find_drive.py) is a utility script used to physically locate a drive by blinking its LED, not to check logical RAID configuration.
* Option B (puredb list drives) is an internal engineering command (puredb) that is generally not intended for standard field verification and may require root-level access. The puredrive command is the standard CLI tool for this validation.
NEW QUESTION # 36
What is the rack unit height of a FlashArray//XL?
- A. 0
- B. 1
- C. 2
Answer: B
Explanation:
The FlashArray//XL models are designed to fit into a 5U rack space, which is equivalent to 5 rack units. Each rack unit (U) is 1.75 inches in height, so a 5U chassis would be 8.75 inches tall. However, the FlashArray//XL chassis is designed to be 5U in height, providing a compact and efficient form factor for enterprise storage needs.
NEW QUESTION # 37
Which PCIe slot must be used for a SAS HBA on R4B revision controllers?
- A. PCIe slot 0
- B. PCIe slot 4
- C. PCIe slot 1
Answer: C
Explanation:
While modern FlashArrays (like the XR4 and XL series) primarily use NVMe-oF/RoCE for backend connectivity, specific configurations or legacy support scenarios may still require a SAS HBA (Serial Attached SCSI Host Bus Adapter), for example, when connecting to older SAS-based expansion shelves during a migration or hybrid configuration.
For R4B revision controllers (a specific hardware revision of the Gen 4 controller), the strict hardware addressing map requires that any SAS HBA be installed in PCIe Slot 1.
Slot 1 provides the specific PCIe lane routing and BIOS interrupts required for the legacy SAS controller to be recognized and function without conflicting with the native NVMe fabric.
Installing the card in Slot 0 (typically reserved for RoCE/Ethernet backend) or Slot 4 would likely result in the card being ignored by Purity or causing boot errors due to resource conflict.
NEW QUESTION # 38
How many power connections are required for the FlashArray//XL chassis?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
Understanding the physical power requirements of the Pure Storage FlashArray//XL is critical during the site planning and rack-and-stack phases of an installation. Unlike the standard 3U FlashArray//X or //C models, which operate on two power supplies (one per controller for standard 1+1 redundancy), the FlashArray//XL represents a significant leap in compute density and power consumption.
Housed in a massive 5U chassis, the //XL architecture features highly powerful multi-core Intel processors, expansive memory footprints, and a dense PCIe Gen 4 topology to support massive NVMe-oF backend scaling. To safely deliver and distribute the necessary wattage to these components while maintaining enterprise-grade high availability, the //XL chassis is equipped with four dedicated Power Supply Units (PSUs).
During physical installation, the Implementation Engineer must connect all four C20 power receptacles to the rack's Power Distribution Units (PDUs). Best practices mandate that these four connections are split across separate PDUs (e.g., PSUs 0 and 2 on PDU A, and PSUs 1 and 3 on PDU B) to ensure N+N power redundancy. Attempting to power the //XL chassis with only two connections will trigger severe hardware fault alerts within Purity and may prevent the array from drawing enough power to safely initialize both controllers and the 40 front-loading DirectFlash Module with Distributed NVRAM (DFMD) slots.
NEW QUESTION # 39
What upgrade scenario required an upgrade of power supplies?
- A. X50 > X70
- B. X50R2 > X50R3
- C. X10 > X50
Answer: C
Explanation:
Upgrading from FlashArray X10 to X50 requires upgrading power supplies to meet the higher power demands of the larger chassis and expanded hardware.
NEW QUESTION # 40
What command will view NVRAM install and update status?
- A. puredrive list
- B. purehw list --all
- C. purearray list
Answer: B
Explanation:
The command purehw list --all is the correct CLI instruction to view the comprehensive status of all hardware components, including the NVRAM modules .
* Command Scope: While purehw list provides a general hardware summary, the --all flag (or specifying --type nvram) ensures that granular details about the NVRAM modules-such as their presence, health status, and firmware/update status-are displayed.
* NVRAM Context: In FlashArray models that utilize dedicated NVRAM modules (like the FA-400,
//M, or specific //X configurations), these components are critical for write acknowledgement. During an upgrade or installation, verification that these modules are "healthy" and "idle" (not destaging) is mandatory.
* Incorrect Options:
* purearray list (Option A) displays high-level array attributes like the array name, ID, and overall OS version, but not component-level hardware status.
* puredrive list (Option B) is specifically for managing the storage media (SSDs/DirectFlash Modules) and does not report on the non-volatile RAM cache modules housed in the controller or chassis.
NEW QUESTION # 41
What command should be used to check the shelf cable connections?
- A. storage_view.py config
- B. purehw list --enclosures
- C. purearray list --shelf
Answer: B
Explanation:
The command purehw list --enclosures displays detailed information about shelf enclosures and their cable connections, helping verify physical connectivity.
NEW QUESTION # 42
An Implementation Engineer is replacing a failing component in a FlashArray//XR4 and must ensure proper service clearance at the front and rear of the array. What is the required service depth clearance for the front and rear panels Of the FlashArray//XR4?
- A. Front panel: 530 mm (20.9 in.), Rear panel: 216 mm (8.5 in.)
- B. Front panel: 530 mm (20.9 in.), Rear panel: 530 mm (20.9 in.)
- C. Front panel: 216 mm (8.5 in.), Rear panel: 530 mm (20.9 in.)
Answer: C
Explanation:
Service clearance is a critical physical installation requirement to ensure that components (like controllers, fans, and drives) can be safely removed and replaced without obstruction.
For the FlashArray//XR4, the specific service depth requirements are:
Front Panel: 216 mm (8.5 in.). This allows sufficient room to open the bezel, unlatch drives, and pull them out of the chassis.
Rear Panel: 530 mm (20.9 in.). This larger clearance is necessary because the controllers themselves (which are long, heavy components) slide out from the rear of the chassis. The engineer needs enough space to fully extract the controller without hitting a wall or another rack door.
Adhering to these clearances prevents situations where a failed controller cannot be replaced because the rack is too close to a wall.
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NEW QUESTION # 43
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