VMware ESXi provides storage virtualization based on the ESXi host (this logically abstracts the datacenter storage layer from VM and ESXi) whereas VM uses a virtual disk to store its OS, program files, and other data associated with its activities. A virtual disk is a small-to-big physical file that can be moved, copied, backed up, and archived effortlessly. We are permitted to configure the VM with as many virtual disks as it supports. In order to access virtual disks, a VM uses virtual SCSI controllers, such as BusLogic Parallel, LSI Logic SAS, LSI Logic Parallel, and VMware Paravirtual. These controllers are the only types of SCSI controllers that a VM can see and access.

Before we dive deep into the essentials of VMware vSphere, let's explore VMware storage terminologies. Physical servers attach directly to the storage, either internal to the server chassis or in an exterior array.

About data store and VM associations; VM is stored as a set of files...