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Hyper-V and VHD Performance - Dynamic vs. Fixed

With the recent release of Hyper-V, customers are starting to ask us how to configure Hyper-V to get the best performance. It’s generally recognized that there is overheard running a virtualized environment, but the question that really needs to...

Published Mon, Sep 09 2008 11:31 PM by Bink

Filed under: Hyper-V, VHD, Performance, Storage
Hyper-V and SSD

Mark Harission writes: Just replaced my primary hard disk with a SSD - big performance improvements. These are the timings to start a SharePoint VM from scratch to displaying the first portal page. SSD disk : VHD and state files Slow secondary disk :...

Published Tue, Sep 09 2008 3:01 PM by Bink

Filed under: Hyper-V, VHD, Storage
Internet Explorer Application Compatibility VPC Image 4.0

This download page contains four separate VPC images, depending on what you want to test. IE6-XPSP3_VPC.exe contains a Windows XP SP3 with IE6 VHD file IE7-XPSP2_VPC.exe contains a Windows XP SP2 with IE7 VHD file IE8B2-XPSP3_VPC.exe contains a Windows...

Published Tue, Sep 09 2008 10:18 AM by Bink

Filed under: Hyper-V, VHD
What are all these AVHD files? –and how to magically make them go away (Hyper-V)

Charles Sterling: I just started playing with Hyper V images for the Team System team and noticed the directory of our primary image contains 48 gigabytes of AVHD files! Looking it up on Technet it turns out AVHD files are Snapshots….Fair Enough...

Published Thu, Aug 08 2008 11:06 AM by Bink

Filed under: Hyper-V, VHD, Guide
Hyper-V: A new breed of SID

The following is the DACL of the VHD file of a virtual machine declared in Hyper-V: Remember, a VHD file is the virtual hard drive of the VM. Note the SID of the form NT VIRTUAL MACHINE\<GUID> . This GUID (090928A5-etc.) is the only Hyper-V identifier...

Published Wed, Aug 08 2008 10:40 PM by Bink

Filed under: Hyper-V, VHD, Guide
Run Hyper-V VHD in Virtual PC

Charles Sterling: I was in the process of installing Windows Server 2008 64 bit to be able to run Hyper V when I realized this is not a requirement. Turns out you can run Hyper V created VHD’s with Virtual PC as long as you have installed Virtual...

Published Fri, Jul 07 2008 3:12 PM by Bink

Filed under: Hyper-V, VHD, Guide
Hyper-V: Why is networking reset in my VM when I copy a VHD?

This is a question I’ve seen come up a few times so figured it was time to examine why in a little more detail. In Virtual Server, you were able to copy VHDs and the associated VMC (Virtual Machine Configuration) file from one host to another, add...

Published Wed, Jul 07 2008 11:18 AM by Bink

Filed under: Hyper-V, VHD, Guide, Networking
How To Clone A Virtual Machine In Hyper-V

Cory: I have been trying to clone a Virtual Machine for Hyper-V in Windows Server 2008. I have used the VM for a while and taken snapshots. I have finally found a way how to do it! Firstly you can not copy the VHD if there are snapshots . (The VHD will...

Published Wed, Jul 07 2008 11:03 AM by Bink

Filed under: Hyper-V, VHD, Guide
Why do I receive error message that the VHD file could not be attached to the IDE controller when I start a Hyper-V VM?

I recently had this exact problem when I moved my lab’s virtual hard disks to an external RAID 0 7200rpm drive to get better performance during demonstrations. I received a General access denied error when I tried to attach the VHD to the IDE controller...

Published Mon, Jul 07 2008 11:50 PM by Bink

Filed under: Hyper-V, VHD, Guide
Windows Server 2008 Evaluation Virtual Hard Drive Images (for Hyper-V)

The Microsoft VHD format is the common virtualization file format for Virtual PC, Virtual Server 2005 and Hyper-V that provides a uniform product support system, and provides more seamless manageability, security, reliability and cost-efficiency for customers...

Published Wed, Jul 07 2008 8:27 PM by Bink

Filed under: Hyper-V, VHD
Hyper-V Script: Compact VHD

here are some scripts for compacting VHDs with Hyper-V. Note that Hyper-V allows you to compact both differencing and dynamically expanding virtual hard disks. PowerShell: # Prompt for the Hyper-V Server to use $HyperVServer = Read-Host "Specify the Hyper...

Published Sat, Jun 06 2008 2:46 PM by Bink

Filed under: Hyper-V, VHD

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