Local storage uses a SCSI-based device such as your ESX host’s hard disk or any external dedicated storage system connected directly to your host.

Local Storage depicts a virtual machine using local SCSI storage.

Local Storage
A host accesses local storage.

In this example of a local storage topology, the ESX host uses a single connection to a disk. On that disk, you can create a VMFS datastore, which you use to store virtual machine disk files.

Although this storage configuration is possible, it is not a recommended topology. Using single connections between storage arrays and hosts creates single points of failure (SPOF) that can cause interruptions when a connection becomes unreliable or fails.

To ensure fault tolerance, some DAS systems support redundant connection paths.