What is the primary feature of Storage vMotion?

The primary feature of Storage vMotion is that it moves running virtual machines from one datastore to another without downtime. This functionality is crucial for maintaining the availability and responsiveness of applications running on virtual machines.

Storage vMotion enables administrators to perform storage maintenance or optimization tasks without interrupting service. For example, if a datastore is nearing capacity or needs to be taken offline for maintenance, virtual machines can be seamlessly migrated to a different datastore, ensuring continuous operation. This capability is particularly valuable in environments where uptime is critical, allowing organizations to manage their storage infrastructure more effectively without impacting performance or availability.

While other features might involve ESXi hosts or management of resource pools, those do not capture the essence of Storage vMotion as accurately as its ability to facilitate live migration of VMs between datastores. Additionally, the feature is not focused on creating backup copies, which is a different function generally served by other VMware tools and processes.