Category Archives: Hyper-V

PowerShell: Change Hyper-V VM VLAN after Live Migration

One of my old Hyper-V hosts has its virtual switch uplink NICs connected to access ports rather than trunk ports. My other hosts all have trunked uplinks, which means that the VMs need to have a VLAN ID specified to … Continue reading

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Convert Hyper-V VM vhdx to VMware vSphere vmdk

This turned out to be pretty simple, if pretty slow. I was converting from a Hyper-V 2012 R2 VM into vSphere 5.0. The VM itself was also running Windows Server 2012 R2. There are a few steps and points to … Continue reading

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Proper VMware Storage Quality of Service from Tintri

One complaint that I’ve had about mixed storage technology (i.e. SSD and HDD in the same box/same LUN/volume/store) is that an application’s performance can’t be guaranteed to be consistent. For example, if a database has been happily running from SSD … Continue reading

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Defrag your VMs to improve storage performance

Even if you have some kind of clever VM storage device such as a Tintri, ideally you should still defrag your VMs. If you’re still running VMs on a legacy SAN you should definitely keep them defragged. I’m not going … Continue reading

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VMM: The version of virtualization software or the VMM agent is unsupported

I have been adding a Dell VRTX as a Hyper-V 2012 R2 cluster to my System Center Virtual Machine Manager 2012 R2 system. I have two nodes M620 nodes and some shared storage in the VRTX chassis. I created the cluster, … Continue reading

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Hyper-V 2012 R2 VMM status: Host Not Responding

Just noticed that one of my Windows Server 2012 R2 Hyper-V hosts was showing as Host Not Responding in the Status column for all the VMs running on it via System Center Virtual Machine Manager 2012 R2. I tried right-clicking … Continue reading

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VMM 2012 R2 Live Migration failure 0x8007274C

I’d completed my first rebuild of a host from Windows Server 2012 to 2012 R2. I’d put the SCVMM agent etc. back onto it and everything seemed OK. I then tried to do a Live (VSM) migration of a VM from another … Continue reading

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Set Hyper-V 2012 VM NUMA node

Run the following PowerShell command line and you can see what NUMA node your VMs are running on, assuming you a) have NUMA aware host hardware and b) haven’t enabled NUMA spanning: (Get-Counter -ComputerName “HFR3-UWE12” -Counter “Hyper-V VM Vid Partition(*)\Preferred NUMA … Continue reading

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Hyper-V 2012 VM RAM and NUMA nodes

I have some Dell R710 servers that have been running the free edition of XenServer 5.5 since 2009. They have 48GB RAM and two Xeon X5550 CPUs, and host five virtual machines, all running XenApp. This was done as part of … Continue reading

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SCVMMService crashes on VM creation

I’m using a PowerShell script to create a new VM, based on the code you can get System Center Virtual Machine Manager 2012 SP1 to spit out. I made a change to the script to try to use some unattended settings to … Continue reading

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