In testing a 2012 F/O Cluster, it seems that Volume Shadow copies are often lost on a disc if it fails between nodes (or even possibly, if dedup runs)? i.e. Windows
2012 cluster, LUNs mounted with VSS either on the same or other disc). If the cluster fails over between nodes,
shadows copies of X will be cleared from Z or X/X (i.e. equally applies when shadow copies are on the same volume as the data). Discs are appropriately cluster sized, not defragmented etc but it seems that VSS are lost very frequently.
James