Creating and Modifying a VMFS Datastore

A datastore is a manageable storage entity, usually used as a repository for virtual machine files including log files, scripts, configuration files, virtual disks, and so on.
VMFS is a proprietary file system VMware designed for virtual machines. VMFS is well suited for storing a small number of large data files like virtual disks. These files are mostly used by a single host. VMFS differs from other filesystem formats like FAT16/FAT32 and so on in that it can be accessed by multiple hosts connected to the same SAN LUN.
You can set up a VMFS datastore on any SCSI-based storage device that the host can access. VMFS volume creation, extension, and expansion requires first partitioning operations and the VMFS volume operations.