After running diskpart.exe to extend the disk size in Windows, the partition size does not get updated

Products

• VMware vSphere ESXi

Issue/Introduction

After extending a Windows partition using the Microsoft Diskpart command-line utility or Disk Managements (diskmgmt.msc), you experience these symptoms:

• The Windows server guest operating system (Guest OS) shows an incorrect disk size in Disk Management or on My Computer after you expand the disk.
• The vSphere Client and vSphere Web Client display the correct, increased disk size.
• Within the Windows guest operating system, you see:
   
  • Disk Managements (diskmgmt.msc) displays the correct, increased disk size.
  • Share and Storage Management (storagemgmt.msc) does not show increased size of the disk.
  • The partition size does not get updated.
  • The old partition size is retained.

Note: For more information on extending Windows partitions, see Extending partitions in Windows using DiskPart (1007266).

Cause

This issue occurs because the NTFS driver exhausts its resources when it tries to extend the volume.

Resolution

Use the extend command within the Microsoft Diskpart command-line utility.

For more information, see

• Extend or shrink a data volume in Windows
• Extend a basic volume

Additional Information

Extending partitions in Windows using DiskPart