: Supporting "HotAdd" and "NBD" (Network Block Device) transport modes for efficient data transfer. Format Management : Tools like the vmware-vdiskmanager
Yes. VDDK can read thin VMDKs and report allocated vs. virtual size. But writing to a thin disk without proper alignment can cause it to thicken. Use the QueryAllocatedBlocks API. download vmware vddk
Broadcom has moved many VMware downloads behind paywalls, but as of 2026, VDDK continues to be available for free to registered users—a testament to its importance as a foundational development tool. : Supporting "HotAdd" and "NBD" (Network Block Device)
Enables block-level access to virtual disks for faster backups. virtual size
Downloading VDDK is free. Using it to write your own tools is also free. , the moment you distribute a commercial application that bundles VDDK, you must sign a VMware Technology Partner Program agreement. For internal scripts and backup appliances, you are fine.