OS: Windows Server 2012 ,10 Node Hyper-v cluster
Model: ProLiant BL460c Gen8
Storage: FC,HP 3PAR
Error Message:
Multiple Virtual Machine’s went into paused state throwing error “Disk(s) running out of space though 30% free space available

Immediate Observations:

  • Only few Virtual machines went to paused state and observed all VM’s are coming from single volume let’s say Volume 1
  • Volume1 is having 30 % free space , checked with storage team whether the LUN is thick or thin as sometimes LUN may be exhausted if they allocated as thin. It is a thick LUN and no issues observed from storage
  • Tried to resume the VM, after sometime VM moving to pause state
  • Tried to move the CSV disk from one node to another – No Luck
  • Observed that there is no single recommended hotfix installed on any node in a cluster but all nodes are up to date with all critical patches


  • Based on above findings, assumed that there is some known issues would be there as  error is misleading us to  DISK’s are running out of space though 30% free space available. 
  • As there was no single recommended hotfix  installed in cluster , initially installed Hype-v 2012 hotfixes on one node and taken restart.
  • Move the Victim volume to the recently restarted node. – No issues  observed
  • Post keeping an observation, installed all recommended hotfixes

Finally, I am unsure which hotfix resolved exactly but I have seen below forums where these issues addressed in KB2791729 but it is a private hotfix

http://support.microsoft.com/kb/2784261 – Windows Server 2012 Hotfixes