Hyper-V on Windows 8 Client!


Be sure to read the great new posting on the “Building Windows 8” blog:

http://blogs.msdn.com/b/b8/archive/2011/09/07/bringing-hyper-v-to-windows-8.aspx

(Read through the comments too, which talk about support for sleep and hibernate.)

There is one prominent statement made:

Hyper-V requires a 64-bit system that has Second Level Address Translation (SLAT).

That means you have a great reason to consider using the 64-bit version of Windows 8, and why you should buy only hardware with 64-bit support.  But what about the second part of that, SLAT support?  Well, all you really need to understand is that SLAT is a processor feature that improves virtual machine performance, especially when using higher-end video cards (e.g. those used on client machines).  Read more about the benefits in the Hyper-V R2 announcement:

http://technet.microsoft.com/en-us/library/dd446676(WS.10).aspx

This mentions that Intel and AMD have different implementations of this.  Intel calls theirs “Enhanced Page Tables” (EPT), while AMD refers to it as “Nested Page Tables” (NPT).  Regardless, what you really care about is whether or not a particular processor includes the support.  That’s not always easy to figure out from the vendor’s web sites.  Fortunately, there is a newly-updated tool available on the SysInternals web site called Coreinfo that will tell you all about a processor’s capabilities:

http://technet.microsoft.com/en-us/sysinternals/cc835722

Mark Russinovich updated this utility recently to add the ability to detect both Intel EPT and AMD NPT.  Here’s what the output would look like if your machine has an Intel processor with the needed support:

 clip_image002

The AMD output will be slightly different (and not because it’s on a white background instead of a black one):

image

In both cases, the asterisk (“*”) in the second column indicates that the feature is present.  (A minus, “-“, shows if it isn’t.)  Be careful if running this in a VM or on a machine currently running a hypervisor, as these will mask the real processor capabilities.)

So check out your machines today to see if they are ready for Windows 8 client Hyper-V!

Comments (7)
  1. Anonymous says:

    That's really great news! Hope they are keeping on improving HV! It still has a lot of possibilities missing which could be awesome!

    For the new virtual disk format, I just don't understand the 16TB limit, which will soon be reached…  Would it be so difficult to multiply by 100 or 1000? :s

    http://www.hypervhd.com

  2. alex says:

    Run the systeminfo command. It also provides hyper v information

  3. fasd says:

    I have the support but its "not available" even though ive enabeled it in bios.

  4. bucky.fields@hotmail.com says:

    Just loaded Win 8 64 bit and want to use hyperV

    why doesn't hyper-v see the network adapter?

    I can launch VHDs I created before, but in Settings there's no network adapter even though the computer has an internet connection.

    Tried legacy too but that doesn't help

  5. bucky.fields@hotmail.com says:

    hyper v on windows 8 client doesn't see my network adapter

    How do I force hyper-v to see the network adapter on the host PC??

  6. Anonymous says:

    Pingback from Windows 8 Hyper-V Requirements | Akfash’s Weblog

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