Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm running a virtual machine (Hyper-V) on an Windows Server 2008 R2 64-bit machine. The virtual machine is also a Windows Server 2008 R2 64-bit.

The hard drive is a dynamically expanding virtual hard drive of 45 GB, but when I log in on the machine the hard drive is about 20 GB (the initial size). The drive is almost out of space and does not seem to increase automatically.

EDIT: I forgot to mention that I recently expanded the virtual drive. Thanks for pointing that out.

What should I do?

share|improve this question
up vote 0 down vote accepted

I found the answer. Use the Disk Management snap-in from the Computer Management tool to expand the partition within Windows.

EDIT: Yes, yes, I know, it was silly of me to forget that I had to expand the partition on the virtual machine if I expand the virtual drive.

share|improve this answer
Yes, and that is totally unrelated to Hyper-V... the same would happen on a physical machine when you run out of the original partition. – TomTom Jan 14 '13 at 10:49
-1 This is not only completely unrelated to Hyper-V's operation, but you didn't mention that you resized the VHD. The VHD is either not Dynamically Expanding or you choose to configure a partition within the VHD less than the maximum size of the VHD. – Chris S Jan 14 '13 at 13:54
I edited the question. – Peet Brits Jan 15 '13 at 7:28

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.