Dario IT Solutions Blog

Cluster Shared Volumes (CSV) is a new feature that was introduced in Windows 2008 R2.

If you want to read more about it, how it works, and how you can enable it. There is a lot of material out there that you can refer to:

• Windows 2008 R2 NLB & Failover Clustering
• http://technet.microsoft.com/en-us/library/dd759255.aspx
• http://technet.microsoft.com/en-us/library/dd630633(WS.10).aspx
• http://blogs.msdn.com/clustering/archive/2009/03/02/9453288.aspx
• http://blogs.msdn.com/clustering/archive/2009/02/19/9433146.aspx

Well, after you’ve setup your cluster, enabled CSV, and added clustered disks to CSV, it is now time to copy your VHD files to those CSV disk. The big question is, which cluster node should you perform this operation on?

We’ll, to make a long story short – Copy it to the node that owns the CSV disk!

The reason this is important is that if you are running the copy on the coordinator node (the node which owns the CSV volume of interest), the writes are all local writes. If you are running the copy on any other node, the writes are actually redirected over the network (because they are extending writes to the file) and not done directly to the volume.

Hope this will save you some much needed time

Related posts:

1. Windows Server 2008 Hyper-V Storage
2. Performance on Hyper-V
3. Hyper-V Failover Clustering Using Normal Shares
4. Booting an Hyper-V guest from an iSCSI LUN
5. Windows 2008 R2 NLB & Failover Clustering