C: volume on a virtual disk within a Server 2008 R2 virtual machine won't extend correctly.

Under Disk Management, Disk 0 is showing 119.9 GB NTFS for the C: volume, however C: under Windows Explorer only shows it as 100 GB.

I have tried extending the volume under both Disk Management and using DISKPART from the command line. DISKPART shows error "DiskPart has encountered an error: The device does not recognize the command. See the System Event Log for more information."

Disk Management


  • See the System Event Log for more information. - What's in the event log? – ItsMidas Jul 29 '16 at 7:20
  • Have you tried just using extend without arguments? – Katherine Villyard Jul 29 '16 at 22:41
  • I cannot see any events being logged in Event Viewer when running 'extend filesystem'. – Ash Aug 1 '16 at 5:24

There is no chance to extend the volume of c using diskpart. U should use third party software. https://www.paragon-software.com/home/pm-express

download it and work with its feature

| improve this answer | |
  • I tested EaseUS Partition Master due its support of Windows Server OS's. Unfortunately it reports the same as Disk Management - disk capacity is 119 GB. C:\ under Windows Explorer still reports as being 100 GB. – Ash Aug 1 '16 at 5:45
  • send me screenshot with error – Vasudevan Aug 5 '16 at 4:25

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