This is a bit old – but I am still getting questions from people about it so I wanted to get a blog post down. If you have a cluster with three or more nodes – you may encounter problems with CSV after installing SP1. If you are seeing any of the following problems:
The Validate SCSI Device Vital Product Data (VPD) test fails. Additionally, you receive an error message that resembles the following:
Failed to get SCSI page 83h VPD descriptors for cluster disk <number> from <node name> status 2
The List Potential Cluster Disks storage validation test may display a warning message that resembles the following:
Disk with identifier <value> has a Persistent Reservation on it. The disk might be part of some other cluster. Removing the disk from validation set.
Then you need to download this hotfix: http://support.microsoft.com/kb/2531907
Cheers,
Ben
--> It is all there :
http://blogs.msdn.com/b/virtual_pc_guy/archive/2011/06/20/cluster-problems-after-installing-sp1.aspx
