Learn the recommended method for rescanning storage adapters in ESXi to ensure your servers recognize new volumes. Optimize your VMware environment with expert tips.

Question

You have just presented storage to an ESXi server and want to rescan the storage adapter to ensure the server can see the new volume. Based on recommended best practices, what is the preferred method to perform this task?

A. Run the command from a non-cluster host using the ESX CLI
B. Use the vSphere Client to perform the rescan of the host
C. Run the command from the ESXi server with the ESX CLI enabled
D. Use the vSphere VSI plugin to rescan the entire cluster

Answer

B. Use the vSphere Client to perform the rescan of the host

Explanation

While all options presented will technically achieve the rescan, using the vSphere Client offers several advantages making it the preferred method according to best practices:

• Centralized Management: vSphere Client provides a single interface to manage your entire ESXi environment. This centralizes the rescan operation, making it easier to track and manage compared to using individual ESXi hosts.
• Consistency and Ease of Use: The vSphere Client offers a consistent and user-friendly interface for rescanning storage adapters. This reduces the risk of errors compared to using command-line tools, which can be more complex and prone to typos.
• Granular Control: The vSphere Client allows you to rescan specific storage adapters or the entire host. This level of control is beneficial when you only need to refresh a particular adapter, avoiding unnecessary rescans of other adapters.
• Cluster Awareness: Although not directly relevant to the question asking about a single host, the vSphere Client also facilitates rescans at the cluster level if needed in the future.

Why other options are not preferred:

• Option A and C: Using the ESX CLI requires familiarity with command-line tools and specific commands, increasing the complexity and risk of errors.
• Option D: While the vSphere VSI plugin can rescan the entire cluster, it’s not necessary for this specific scenario and might impact performance unnecessarily by rescanning hosts that don’t require it.

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