VMware ESXi Resize the disk of a Windows host

We will demonstrate how to use vSphere and OS management tools to add space to your virtual disks for Windows.
In the vSphere interface menu, go to the OS Hosts dashboard.

Before you can reduce the size of the virtual disk on the VMWare ESXi datastore:

1. Delete all virtual machine snapshots;

Run your Windows Hosts.

2. Delete all files and uninstall program not used;

The recommended system partition size is greater than 1 GB

Shutdown your Windows Hosts

3. Edit your ESXi host drive to large size

Start vm

4. Extend a Partition in a Windows Virtual Machine

You must start the Disk Management console (Computer Management-> Storage-> Disk Management)

In this case, the WinRE Recovery Partition is to the right of the partition we want to shrink. To shrink the partition in Windows, there should be no other partitions to the right of the partition you are trying to shrink. You Cannot extend volume blocked by A Recovery Partition.

Fix: Can’t Extend Volume in Windows
First, assign a drive letter to the recovery partition. Open a command prompt as an administrator and run:

List available local disks:

Choose your disk where existing system volume:

 List available local partition disks:

Select the recovery partition (in your case it may be a different partition number):

Check your current WinRE configuration:

Now you can extend your system partition (drive C:):

·         Open the diskmgmt.msc console;

·         Right-click on the partition you want to increase and select Extend Volume; extend drive C in windows

·         Specify the amount of space in MB you want to increase your partition. In my case, I will extend the C: drive by 5 GB. Click Next -> Finish; Extend Volume to Unallocated Space in Windows

·         The system partition has been extended successfully.  Increase C Drive Space in Windows

Reboot

 select type primary

First, check if the disk partition style is a GUID Partition Table (GPT) or a Master Boot Record (MBR).

To do that, run list disk. Check if there is an asterisk character (*) in the “Gpt” column.

  If there is an asterisk character (*), then the drive is GPT. Otherwise, the drive is MBR.

If your disk is GPT

If your disk is MBR

After reagent enable then FINISH TO REBOOT

OK Finish.

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