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>> FlashArray-Implementation-Specialist Flexible Testing Engine <<
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NEW QUESTION # 142
Which enablement feature will cause Mirrored Write statistics to appear in the Analysis section of the FlashArray Purity 6.x GUI?
Answer: C
Explanation:
ActiveCluster (AC) is the enablement feature that introduces Mirrored Write statistics into the Analysis section of the Purity GUI.
ActiveCluster provides synchronous replication (active-active) between two FlashArrays. In this configuration, every write request from a host must be committed to the NVRAM of both arrays before an acknowledgement is sent back to the host. This ensures zero Recovery Point Objective (RPO). Because this synchronous process introduces a latency component related to the network round-trip and the remote array's acknowledgement, Purity exposes a specific metric called "Mirrored Write" latency.
This metric allows administrators to distinguish between the local array's write processing time and the time spent waiting for the replication partner. It is critical for troubleshooting performance in stretched-cluster environments; if write latency spikes, the "Mirrored Write" stat helps determine if the bottleneck is the inter-site link (WAN) or the remote array. Neither FA File (NAS services) nor ActiveDR (asynchronous/near-sync replication) generate this specific synchronous write metric in the Analysis dashboard.
NEW QUESTION # 143
Which enablement feature will cause Mirrored Write statistics to appear in the Analysis section of the FlashArray Purity 6.x GUI?
Answer: C
Explanation:
Mirrored Write statistics appear in the Purity GUI's Analysis section when ActiveCluster is enabled, as it tracks synchronous replication activity between clusters.
NEW QUESTION # 144
Which cards are required to connect a DirectFlash Shelf to an FlashArray//XLR5?
Answer: A
Explanation:
The FlashArray//XL series (specifically the //XLR5 in this context) utilizes a 100 Gigabit Ethernet-based back-end fabric to communicate with DirectFlash Shelves (DFS). This connection relies on the RoCE (RDMA over Converged Ethernet) protocol to ensure low-latency access to the external NVMe modules.
The specific PCIe interface card validated for this connectivity is often labeled in the Bill of Materials (BOM) or configuration guides as the 2-Port 100GbE iSCSI/RoCE card (or simply the 100GbE Ethernet/RoCE card depending on the specific firmware/labeling revision). Crucially, it must be a 100GbE capability card.
The //XL platform standardized on 100GbE for its shelf interconnects, moving away from the 50GbE used in some previous generations of the //X series. The 200GbE cards are typically reserved for high-speed host connectivity or clustering, not the standard shelf loop. Therefore, ensuring the BOM includes the correct 100GbE RoCE-capable cards is essential for successful shelf detection and operation during installation.
NEW QUESTION # 145
An Implementation Engineer is installing a FlashArray//XL chassis with two DirectFlash Shelves. What is the minimum rack space required for this installation?
Answer: C
Explanation:
Calculating rack space requirements is a fundamental pre-installation task. The FlashArray//XL series features a larger chassis than the //X series to accommodate its increased power, cooling, and DirectFlash capabilities.
The FlashArray//XL Chassis itself occupies 5 Rack Units (5U).
A standard DirectFlash Shelf (DFS) occupies 2 Rack Units (2U).
In this scenario, the customer is installing one //XL chassis and two DFS shelves.
Calculation:
1 x //XL Chassis (5U) = 5U
2 x DirectFlash Shelves (2U each) = 4U
Total = 9U.
Therefore, the Implementation Engineer must verify that there are at least 9 contiguous Rack Units available in the cabinet. Standard best practice also suggests placing the shelves immediately above or below the controller chassis to accommodate the 3-meter maximum cable length for the backend fabric, so these 9U should ideally be in a single block.
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NEW QUESTION # 146
During an intra-series upgrade from //XR3 to //XR4, which command should the Implementation Engineer run to verify host connectivity before removing the secondary controller?
Answer: A
Explanation:
In a Non-Disruptive Upgrade (NDU), ensuring that the host is correctly multipathed and balancing I/O across all paths is critical before taking a controller down. If a host is only using paths to the controller about to be rebooted (CT0, for example), taking that controller offline would cause an outage.
The command iobalance --sampletime 30 (or its wrapper purehost monitor --balance) is the standard tool used during the upgrade procedure to validate this state.
iobalance: This script samples the I/O throughput on all ports for a specified duration (e.g., 30 seconds).
It analyzes the distribution of I/O. If it detects that I/O is heavily skewed or missing entirely on the "secondary" paths (the ones that will survive the reboot), it flags a warning.
This allows the Implementation Engineer to pause and remediate the host multipathing configuration (e.g., fixing a bad cable or zoning issue) before proceeding with the controller removal, ensuring the NDU remains truly non-disruptive.
NEW QUESTION # 147
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