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Question 15 - D-PWF-DS-23 discussion

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An administrator is adding an NVMe device to an existing storage pool They provide the following details in the Add Storage Device to SDS dialog box

* Device Path /dev/disk/by-id'Dell_Express_Flash_NVMe_PM1725_V6TB_SFF_ _S2JPNA0J500141

* Device Name NVMe A. 1.6 TB

* Storage Pool SP-1

What is the result of this action'?

A.
The device addition fails due to an invalid path
Answers
A.
The device addition fails due to an invalid path
B.
The device is named 'NVMeAt 6 TB' and added to the Storage Pool 'SP-1'.
Answers
B.
The device is named 'NVMeAt 6 TB' and added to the Storage Pool 'SP-1'.
C.
The device name is truncated to 'NVMe' and added lo the Storage Pool 'SP-t'
Answers
C.
The device name is truncated to 'NVMe' and added lo the Storage Pool 'SP-t'
D.
The device addition tails due to invalid characters in the name
Answers
D.
The device addition tails due to invalid characters in the name
Suggested answer: A

Explanation:

When adding an NVMe device to an existing storage pool in PowerFlex, the details provided in the ''Add Storage Device to SDS'' dialog box must be accurate and follow the correct syntax. In the scenario provided, the device path contains an invalid character (an apostrophe) and an incorrect format, which would cause the device addition to fail.

Here's a breakdown of the process and where the error occurs:

Device Path: The device path should be a valid Linux device path, typically starting with/dev/disk/by-id/.The path provided contains an apostrophe (') which is not a valid character in Linux file paths and would result in an error1.

Device Name: The device name should be a simple identifier without spaces or special characters. The name provided, ''NVMe A.1.6 TB'', contains spaces and periods, which are not typical for device names and could potentially lead to issues, although the primary cause of failure is the invalid device path1.

Storage Pool: The storage pool name ''SP-1'' is a valid identifier, but it is contingent on the correct device path and name for the device to be added successfully.

The result of the action, given the invalid device path, would be that the device addition fails. It is crucial to ensure that all details entered in the dialog box adhere to the expected formats and do not contain invalid characters to avoid such failures.

This explanation is based on the standard practices for device path naming conventions in Linux systems and the configuration guidelines for PowerFlex systems as described in Dell's official documentation1. Correcting the device path by removing the invalid character and ensuring the proper format would resolve the issue and allow the device to be added to the storage pool successfully.

asked 16/09/2024
Daniel Martos
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