You want to quickly restore a disk and access the data on the disk.You want to copy and add disks from one virtual machine into another virtual machine.A virtual machine has multiple disks and you want to restore only some disks.This restore type is useful in the following scenarios: Use this restore type to attach one or more disks of a backed up virtual machine to an existing virtual machine. The storage device hosting the disks has errors or is not available.The virtual machine is running, but one of its disks has errors.Use this restore type to restore disks (VMDK files) from a virtual machine. Note: Backup and restores of entire virtual machines are supported for all guest operating systems supported by VMware. This option enables you to duplicate a VMware virtual machine for a different environment, or to migrate a virtual machine from VMware to a different hypervisor. The default selection is VMware but you can use this option to convert a VMware virtual machine to Microsoft Hyper-V, Azure, or Amazon. If at least one Hyper-V node is configured on the CommServe host, a Restore as option is displayed.You want to move the virtual machine to a new host.You want to restore an entire virtual machine to a specific point in time.You are unable to turn on the virtual machine, but the disks (VMDK files) are available for the machine.This restore type is selected by default. When restoring VMware data, you can select one of the following restore types.

Backup and Restore Agents > Virtualization > Virtual Server Agent > VMware > Restores > Restore Types Restore Types for VMware

Convert vmdk to vmx files