We are having disk performance problems on several of our Windows 2003 virtual machines.
When performing a file copy on that machine (400Mb), the average disk queue length goes to 100% and even when the file is fully copied, it stays at 100% for (about) 10 additional seconds.
During this file copy, the entire virtual machine is slowing down.
As said, we have this issue on several machines who are running Windows 2003 R2, both in x86 or x64 architecture.
File copying is also reasonably slower on these machines then on other machines in the same environment (EXS 5.1)
Coincidence or not, but on all of these machines, we have VSS problems and are unable to perform backups using VSS (although the service is running).
Does anyone have a clue on how to solve this issue? Can anyone tell us if both problems can be related?