Accessing the Hyper-V API: disks.

Moving VMs to Hyper-v...

James O'Neill's blog — Wed, 28 May 2008 18:14:40 GMT

There are 3 things I get asked regularly about Hyper-V. The first is "When can I get it ?". I've covered

More on the Hyper-V API

James O'Neill's blog — Sun, 11 May 2008 16:02:25 GMT

In which we see how to set the number of CPUs I started with getting MSVM Computer System objects - which

re: Accessing the Hyper-V API: disks.

James ONeill — Tue, 06 May 2008 20:57:49 GMT

I don't know of anyone who is posting C++. I think the theory is this is *mostly* used in scripts, and if someone wants to build a more complex app they can see what is happening in the script and write their code based on that sample.

Hopefully someone will correct me with a URL, - if comments have closed on this post please mail it to me.

re: Accessing the Hyper-V API: disks.

Madhu — Tue, 06 May 2008 16:47:10 GMT

Can I get C++ code sample for the same thing any where. I find a lot of powershell and vb scripts on net but rarely C++.

Hyper-v Snapshots part 2.

James O'Neill's blog — Sat, 03 May 2008 14:44:33 GMT

In my last post I explained how snapshots work and gave a little bit of PowerShell for creating a one

re: Accessing the Hyper-V API: disks.

parag — Fri, 02 May 2008 01:28:13 GMT

Thanks a lot James! I was able to get the VHD file path.

Thanks

-Parag

re: Accessing the Hyper-V API: disks.

James ONeill — Wed, 30 Apr 2008 23:44:53 GMT

Hi Parag, The answer to that is coming in the next installment

However, Set $VM to the VM and $controller to 0 or 1 and this will get the path to the controller

$ctrlPath=((Get-WmiObject -namespace "root\virtualization" -query "Select * from Msvm_ResourceAllocationSettingData where instanceId like '$((Get-VMSettingData $VM).instanceID)%' and resourceSubtype = 'Microsoft Emulated IDE Controller' and address='$Controller'").path.path).replace("\","\\") }

Then set $lun to 0 or 1 and this will get the path to the disk

$drivePath=(Get-WmiObject -namespace "root\virtualization" -query "SELECT * FROM Msvm_ResourceAllocationSettingData WHERE (PARENT='$ctrlPath') and (Address='$LUN')").path.path.replace("\","\\") Then you can get the resource allocation settings data with this

$rasd=Get-WmiObject -namespace "root\virtualization" -query "Select * from Msvm_ResourceAllocationSettingData where parent = '$DrivePath' " The "Connection" field holds the path. If you look at the GUIDs in the VM and the RASD object you can figure how to do the query more simply. But this code was easy to share from the computer I'm on :-)

re: Accessing the Hyper-V API: disks.

parag_r — Wed, 30 Apr 2008 22:00:33 GMT

Hi James,

Most of these methods take the VHD path as the input. However if I want to perform on of these operations on the virtual disk of a particular VM, how do I get the path for that virtual disk.

I know we can get it from the GUI and by looking at the xml file for this VM. But I am trying to get this programmatically by using the Hyper-V APIs.

Thanks,

Parag