Attaching Passthough Disks Via WMI (SCSI or IDE)

So you want to use passthough disks with Hyper-V cool – but how do you script attaching them?  Well here’s your answer…  But first you need to decide if you are going to attach them to the virtual IDE controller or the virtual SCSI controller.  The IDE controller is ideal if you plan to boot…


Recommend Hotfixes For System Center Virtual Machine Manager (SCVMM)

If your running System Center Virtual Machine Manager (SCVMM) you should take a look at KB 962941.  The KB describes and links to all of the recommended Windows hotfixes, SCVMM hotfixes and Hyper-V server hotfixes that are important for SCVMM functionality. KB Article Link:   Taylor Brown Hyper-V Integration Test Lead


Hyper-V: Background Merging of AVHD’s… When’s it done?

I think it might be best to start at ground zero with this topic and explain what a snapshot really is and how it work’s (if you already know skip a head…).  Hyper-V introduced a new feature called a snapshot – snapshots allow you to capture and save the point in time state of a…


Performance Smack Down – Hyper-V vs. VMware vs. Citrix

Virtualization Review posted the results of a performance shootout between Microsoft Hyper-V, VMware ESX, and Citrix XenServer…  The launched three tests against the various platforms.  First was a small number of heavy workload systems,  one database server running a midsize database and six VMs with heavy workload of CPU and memory.  Second – was a…


Hyper-V VMMS Certificate Expiration Problem and Resolution

In the coming days/weeks some of you may see some new errors from Hyper-V.  The first is an error when you try and use VMConnect or SCVMM to connect to a running virtual machine – the error is “Cannot connect to the virtual machine because the authentication certificate is expired or invalid. Would you like…


How Are My VHD’s/Passthough Disk’s Connected To My Virtual Machine?

Updated 2/23 – Added VHD File Size and Fixed a Few Bugs. This is a follow up on my previous post on Hyper-V WMI: What VHD’s/Physical Disks Are Associated With a Virtual Machine?.  I had been getting questions about how to better identify what disks are connected to what bus location/controller.  Specifically I have been…


Red Hat Support Coming To Hyper-V

Last night Mike Neil posted to the Virtualization Team Blog regarding a new agreement between Microsoft and Red Hat to bring Red Hat guest support to Hyper-V.  Take a look at Mike’s full blog post Microsoft and Red Hat Cooperative Technical Support and/or the Red Hat press release Red Hat Moves to Expand Server Virtualization…


Microsoft Hyper-V Server 2008 R2 Beta Released

The Microsoft Hyper-V Server 2008 R2 Beta has been posted on the download center along with an overview document and a setup and configuration guide.  Please note that all features, support, configuration etc… is subject to change as this is a beta Download Links Microsoft Hyper-V Server 2008 R2 Beta Download Microsoft Hyper-V Server 2008…


Hyper-V Backup/Restore QFE Released

If you are backing up your Hyper-V virtual machines using our VSS writer (backing up the physical server) you should be aware of a new Hotfix (KB959962) we released today that addresses three issues.  Issue 1 If you back up a Hyper-V virtual machine that has multiple volumes, the backup may fail. If you check…


Hyper-V V2: Guest Only External Networks + Add Roles Wizard Changes

The Hyper-V best practice in traditional production environments is that any physical network interface used by guest virtual machines is dedicated and isolated to guest only traffic and not shared with the management operating system (host).  This recommendation was made for several reasons – security is the primary reason since virtual machines are considered less…