$ 0 0 Starting Windows 2012, Windows cluster supports asymmetric disks which is required for Cluster participating in Always ON technology hence is a useful concept to be aware of, http://www.sqlserverfaq.net/2012/09/16/when-do-we-need-asymmetric-storage-with-alwayson-fci-and-availability-storage/ https://social.technet.microsoft.com/Forums/windows/en-US/493bf438-eb9d-405c-81c5-42aaa31eef8a/configure-asymmetric-storage-for-crosssite-windows-failover-cluster?forum=winserverClustering