VCP-DCV Configure and Manage vSphere Storage Practice Question
A vSphere administrator needs to present a new Fibre Channel LUN to an ESXi host. The LUN is already zoned and visible to the host's HBA. Which action should the administrator take to make the datastore available for use?
⚠ Common exam trap
The trap here is assuming that creating a datastore will automatically detect the new LUN, when a rescan is required first.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Rescan the storage adapter in the vSphere Client.
To make a newly presented Fibre Channel LUN available, the administrator must rescan the storage adapter on the ESXi host. This can be done through the vSphere Client by navigating to the host's Storage Adapters and initiating a rescan. Once the rescan completes, the LUN appears and can be used to create a datastore. Creating the datastore without a rescan will not work because the LUN is not yet detected.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Rescan the storage adapter in the vSphere Client.
Why this is correct
After zoning and presenting a new LUN, the ESXi host must rescan its storage adapters to detect the new device. This can be done via the vSphere Client by selecting the host, going to Configure > Storage Adapters, and clicking Rescan. The rescan discovers new LUNs and makes them available for creating a datastore. Without a rescan, the host will not see the LUN.
- ✗
Create a new datastore and select the LUN from the list.
Why it's wrong here
Creating a new datastore is a subsequent step after the LUN is detected. However, the LUN will not appear in the list until the host has rescanned its storage adapters. Therefore, this action alone will not work; the rescan must be performed first. The administrator cannot create a datastore on an undetected LUN.
- ✗
Reboot the ESXi host to detect the new LUN.
Why it's wrong here
Rebooting the ESXi host is unnecessary and disruptive. A rescan of the storage adapters is sufficient to detect new LUNs. Rebooting should be avoided unless required for other reasons, as it affects all VMs on the host. The correct procedure is to rescan the adapter, not reboot.
- ✗
Run the esxcli storage core adapter rescan command from the host's DCUI.
Why it's wrong here
The esxcli storage core adapter rescan command is a valid CLI method to rescan adapters, but it is not performed from the DCUI (Direct Console User Interface). The DCUI is a limited interface for basic host management. The command would be run from an SSH session or via the vSphere Client's ESXi Shell. However, the question asks for the action to make the datastore available, and the vSphere Client rescan is the typical method. The DCUI is not the correct place to run this command.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official VMware exam blueprint
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