Hyper-v can’t open created VM

Windows 2008 Hyper-V worked fine.  I was able to create and run virtual machines.  I decided to upgrade to Windows 2008 R2 RTM for lab testing.  Available articles said you can leave Hyper-V installed in Windows 2008 even though there is a warning during installation of R2.  I exported a VM for importing back into W2008 R2.  Installed W2008R2.  The imported VM will not start.  Created new VM’s and they will not start.  Event log shows two errors occurring whenever an attempt is made to start a VM.  Event log follows.  I have spent a couple of days trying to figure out what happened.  Nothing changed in the BIOS to disable VM’s and the upgrade went without error.  Read More

Hyper-V File Storage and Permissions

Introduction Hyper-V takes a different approach to virtual machine file storage than Virtual Server 2005 R2. The default locations are different, the storage approach is different, and the configuration files are different. What does this mean to the seasoned Virtual Server 2005 R2 administrator? It means that you will need to start with a fresh slate and learn how it all works. So let us dive in. Service SIDS To allow all of the file storage and access changes, Hyper-V leverages a new type of SID added to Windows Server 2008 called a Service SID to control access to virtual machine files. A virtual machine gets a GUID when created and a corresponding unique Service SID is created for the Read More