Do you have the right updates on your Hyper-V Cluster?

I have been on a number of customer calls recently where people were hitting problems for which we have already released hot-fixes.  If you are running a Windows Server 2012 R2 Hyper-V cluster I would strongly recommend that you read this article: Recommended hotfixes and updates for Windows Server 2012 R2-based failover clustershttps://support.microsoft.com/en-us/kb/2920151 This article… Read more

Hyper-V and "Event ID: 157 – Disk x has been surprise removed"

After posting about Hyper-V and Event ID 58 the other week – I had a number of people ask me about Event ID 157.  They told me that each time they backed up a virtual machine they were seeing this event inside of the virtual machine as well. At first, I could not figure out… Read more

Checking Virtual Machine Health After a Disaster

Last weekend I suffered a human disaster in my “server room”.  Which is to say that I knocked down a shelf in my garage and accidentally disconnected the UPS.  This, in turn turned off all of my hardware.  An hour later I had fixed the shelf, reconnected all the wiring and had booted the servers again…. Read more

SMB Bandwidth Limits and Shared Nothing Live Migration

This week I have been discussing the network QoS options available for a Windows Server private cloud.  On Wednesday I talked about the SMB bandwidth limit capability – that allows you to specify separate bandwidth limits for virtual machine storage and live migration traffic over SMB.  One interesting thing to understand is how this effects… Read more

Converged Network QoS and Live Migration over SMB

On Monday I gave you a pointer to a great resource on configuring network QoS in converged networking configurations.  One thing that this documentation does not cover is how to configure QoS for Live Migration over SMB. If you are using Live Migration over SMB, and storing virtual machine hard drives on SMB shares, then… Read more

Getting QoS Right with Hyper-V and Converged Networking

Back in the “olden days” of Windows Server 2008 R2, getting networking right for a Hyper-V private cloud was simple.  Annoying – yes.  But simple.  Basically – you just had to have a separate network adapter (or two) for every class of traffic possible. Thankfully with Windows Server 2012 (and 2012 R2) there are a… Read more

Hyper-V and "Event ID: 58 – The disk signature of disk 2 is equal to the disk signature of disk 0"

On Monday I talked about how we had changed backup in Windows Server 2012 R2 to make it scale better.  However, there is one annoying downside of this change that I did not discuss.  And that is Event ID 58. As I mentioned – we now connect a copy of a virtual machines virtual hard… Read more

How Hyper-V Backup Got Better in 2012 R2 (but now requires a SCSI controller)

Hyper-V has always provided the ability to backup all running virtual machines from the host operating system, without incurring any downtime for the virtual machines being backed up.  To do this it utilizes the fantastic VSS (Volume Shadow Copy Services) functionality in Windows.  When a user wants to backup a Hyper-V server, the following process… Read more

Hyper-V Backup doesn’t interrupt running virtual machines (anymore)

Hyper-V has always provided the ability to backup all your virtual machines from the host operating system.  In order to provide a consistent backup of the virtual machine – Hyper-V has traditionally employed two approaches: If the guest operating system has the Hyper-V backup integration service installed and running: use VSS (for Windows) or file… Read more