Delta Vmdk Here

In the world of VMware virtualization, the Virtual Machine Disk (VMDK) file is the primary container for a virtual machine's hard drive. However, when you take a snapshot, clone a VM, or use linked clones, you encounter a special type of file: the Delta VMDK . What Is a Delta VMDK? A Delta VMDK (often seen with the -delta.vmdk suffix) is a difference disk . It records only the changes made to the original parent VMDK disk since a specific point in time.

Instead of modifying the original flat VMDK file, VMware freezes the parent disk and creates a new, sparse file (the delta). All new writes go to this delta file. Reads, however, must check both the delta (for recent changes) and the parent (for unchanged data). delta vmdk