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질문 # 29
A customer would like to consolidate their SAS shelves and wants to evacuate multiple shelves in parallel.
What is a prerequisite for this procedure?
정답:C
설명:
To perform parallel evacuation of multiple SAS shelves , the FlashArray must be running Purity//FA 6.0 or higher.
Prior to Purity version 6.x, the shelf evacuation process (used during capacity consolidation or shelf retirement) was a serialized operation. An Implementation Engineer had to issue the evacuation command for one shelf, wait for all data to move to other storage within the array, and physically remove that shelf before starting the process for the next one. This could be time-consuming for large clusters of legacy SAS shelves.
With the release of Purity//FA 6.0, Pure Storage introduced significant enhancements to data mobility and background operational efficiency, including the ability to issue evacuation commands for multiple external shelves simultaneously. The system's intelligent scheduler manages the I/O bandwidth to ensure that the parallel data movement does not impact frontend host performance. While having sufficient free space (Option C) is logically necessary to hold the evacuated data, the specific functional capability to trigger concurrent evacuations is a software feature tied strictly to the Purity 6.x code base. Option B is irrelevant to the software capability of the array.
질문 # 30
An Implementation Engineer needs to run the puresetup replace procedure on the FlashArray//X during a controller upgrade.
Which command should the Implementation Engineer run on the new controller to determine its model?
정답:A
설명:
The command hwconfig --model returns the model information of the controller, which is essential before running the puresetup replace procedure.
질문 # 31
An Implementation Engineer is performing a FlashArray//XR4 to FlashArray//XL upgrade, and is preparing to remove the XR4 CT0 controller.
Which command should the Implementation Engineer run to stop Purity after confirming CT0 is the secondary controller?
정답:B
설명:
During a complex cross-generational Hardware Non-Disruptive Upgrade (HWNDU) from a FlashArray//XR4 to a FlashArray//XL, the Implementation Engineer must carefully orchestrate the shutdown and removal of the legacy compute nodes. Before physically unlatching and removing the CT0 controller, the Purity//FA operating system processes running on that specific node must be gracefully halted.
Because standard user commands do not allow for this level of low-level service manipulation, the engineer must utilize the purewes (Wessex) command-line suite. Wessex is the internal engineering toolkit used to override high-availability states during hardware replacements.
The correct command to execute is purewes controller disable --purity --verify-mode secondary --verify- array < ARRAY_NAME > ct0 .
This command contains several critical safety mechanisms. The --purity flag specifies that the script should shut down the Purity storage processes rather than just network interfaces. The --verify-mode secondary flag is a mandatory safeguard; it checks the cluster state to guarantee that CT0 has already successfully failed over its active host I/O responsibilities to CT1. If CT0 is still the primary controller, the command will intentionally fail to prevent an accidental storage outage. Finally, --verify-array ensures the engineer is executing this disruptive command on the correct physical array, which is crucial when multiple SSH sessions are open in a busy datacenter.
질문 # 32
A dark site customer requests an evacuation of SH01 on a FlashArray/M50. What is an appropriate next step?
정답:C
설명:
For a Dark Site customer (where Remote Assist and PhoneHome are disabled), the appropriate next step before performing a shelf evacuation is to use the evac_checks script.
Risk Mitigation: Evacuating a shelf is a resource-intensive operation that permanently removes physical capacity from the system. In a connected environment, Pure Support runs remote diagnostics to verify the array has enough free space and system resources to handle the evacuation safely.
Dark Site Procedure: Since Support cannot log in remotely, the Implementation Engineer must manually run the evac_checks python script (typically loaded via USB or available in the Purity toolkit). This script performs the equivalent validation: checking effectively used capacity, dedup ratios, and system load to predict if the remaining drives can absorb the data from Shelf 01 without filling the array to 100% or causing performance degradation. Relying solely on a generic percentage (Option B or C) is dangerous because it doesn't account for data reduction overhead or specific RAID overheads.
질문 # 33
Prior to installing a new FlashArray controller, which terminal display settings must the Implementation Engineer configure?
정답:A
설명:
When unpacking and installing a new Pure Storage FlashArray controller, the initial configuration-such as assigning management IP addresses, subnet masks, and gateways via the puresetup utility-must be done completely out-of-band. Because the array does not yet have an IP presence on the customer's network, the Implementation Engineer must connect directly to the controller's serial console port using a standard serial-to- USB adapter and terminal emulation software (such as PuTTY, SecureCRT, or Tera Term).
To successfully establish a readable CLI session with the custom Linux microkernel running on the FlashArray controllers, the terminal emulator must be configured with the exact serial communication parameters expected by the array. According to Pure Storage hardware documentation, the mandatory COM port settings are:
* Baud Rate (Speed): 115,200
* Data Bits: 8
* Parity: None (N)
* Stop Bits: 1
* Flow Control: None
This configuration is universally abbreviated as 115200 8-N-1 . If an engineer attempts to use older standard speeds (like 9600 or 38400 baud) or leaves flow control (like Xon/Xoff or RTS/CTS) enabled, the terminal window will display unreadable, garbled characters (often referred to as "wingdings"), or the keyboard inputs will fail to register entirely, preventing the initialization of the array.
질문 # 34
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