When you need to save storage space, you can create a virtual disk in thin provisioned format. The thin provisioned virtual disk starts small and grows as more disk space is required.

This procedure assumes that you are creating a typical or custom virtual machine using the New Virtual Machine wizard.

You can create thin disks only on the datastores that support thin provisioning. If a disk resides on an NFS datastore, you cannot specify the disk format because the NFS server determines the allocation policy for the disk.

In the Create a Disk dialog box, select Allocate and commit space on demand (Thin Provisioning).

A virtual disk in thin format is created. If you do not select the Thin Provisioning option, your virtual disk will have the default thick format.

If you created a virtual disk in the thin format, you can later inflate it to its full size.