VM Disk format.
| value | description |
|---|---|
| SAME_AS_SOURCE | Disk uses the same format as the source template. |
| THIN | Allocate full size and commit on demand. This is only supported on VMFS-3 and newer datastores. Other types of datastores may create thick disks. |
| THICK | A Thick disk allows the datastore to occupy the entire space provisioned for it by creating a file equivalent in size to the disk you are creating (for example, 20 GB on disk for a 20 GB VHD). |
| DYNAMICALLY_EXPANDING | SCVMM only. Dynamically Expanding virtual hard disks save storage space by creating a small file that grows as data is written to it, up to the configured limit. |
| FIXED | SCVMM only. A Fixed-Size disk allows the datastore to occupy the entire space provisioned for it by creating a file equivalent in size to the disk you are creating (for example, 20 GB on disk for a 20 GB VHD). |
| SE_SPARSE | Use Flex-SE format when deploying linked clones, standard thin otherwise. |
| THICK_LAZY | Allocate and commit full disks now. Disk blocks are zeroed out when used. |
| THICK_EAGER | Allocate and commit full disks now. All disk block are zeroed out during disk creation. |