Virtual Machine Density Flexibility in Windows Server 2008 R2 Failover Clustering

Hi Cluster Fans,   Recently Windows Server 2008 R2 Failover Clustering has changed the support statement for the maximum number of Virtual Machines (VMs) that can be hosted on a failover cluster from 64 VMs per node to 1,000 VMs per cluster.  This article reflects the new policy in Hyper-V: Using Hyper-V and Failover Clustering…. Read more

PowerShell for Failover Clustering: Webcast Follow up

Hi Cluster Fans,   Thanks for those of you who attended my webcast on PowerShell a few weeks ago.  If you didn’t have a chance to attend, here is the link to the event:   One of the requests I got was to share the sample scripts.  With pleasure!  Here they are. ·         Demo… Read more

New Clustering Utility – Remote Desktop Connection Manager

Hi Cluster Fans, We wanted to let you know about a new tool which will significantly help you manage your cluster deployments.  Remote Desktop Connection Manager is actually not cluster-specific, but it allows you to logically group server remote desktop connections – ideal if you are working with clusters for easy access to all the… Read more

PowerShell for Failover Clustering: CSV Free Disk Space (and other info)

Hi Cluster PowerShell script writers, We regularly get asked about how to find the free disk space on Cluster Shared Volumes (CSV). In this blog, I will show you how to do this with PowerShell. Here are the CSV volumes in my cluster. Note that Cluster Disk 10 has two partitions.   To find the… Read more

Introduction to the Cluster Quorum Model (Part 2)

Hi,   A few weeks ago we gave an overview of the cluster quorum model:   This week we will provide some more details about when and how the different types are used.     Node Majority  &  Node and Disk Majority   The two most recommended quorum modes are the Node Majority and… Read more

Clustering & High-Availability at TechEd 2010

Hi,   The Clustering team is coming to TechEd New Orleans from June 7-10!    Sign up now at:     In addition to many technical presentation, the team will be manning the Cluster Booth (Orange – WSV – 7) throughout the week, so please stop by to ask your questions and share your… Read more

Introduction to the Cluster Quorum Model

Failover clusters ensure that workloads such as File Server, Exchange, SQL, and Virtual Machines are highly available.  These resources are considered highly available if the nodes that host resources are up, however the cluster generally requires more than half the nodes to be running, which is known as having “quorum”.   Quorum is designed to prevent… Read more

PowerShell for Failover Clustering: Understanding Error Codes

Hi,   This blog is about how to handle error codes returned by PowerShell Failover Clustering CMDlets. For an introduction to this topic you can take a look at  Cluster CMDlets can fail for various different reasons, such as passing non-existent entities as parameters (try to delete a group using a name that is… Read more

Creating a Cluster Resource DLL (Part 3)

Hi, In this series of blog posts we will help you to design, develop and debug the Resource DLL you are developing to give your application high-availability with Windows Server 2008 & 2008 R2 Failover Clustering.   We recommend you start with the other blog post in the series: ·         Part 1: ·         Part… Read more

Upcoming Webcasts: Clustering & High-Availability

Hi Cluster Fans,   Over the next few weeks the cluster team is offering a series of public TechNet webcasts focusing on Failover Clustering in Windows Server 2008 R2. High Availability Server Apps with Windows Server 2008 R2 Failover Clusters   Link:   Event ID: 1032448853 Level: 300 Date & Time: Monday, May 03,… Read more