Vmware Flat File =link=

Every virtual hard drive assigned to an ESXi virtual machine relies on a two-part ecosystem:

The file is the actual virtual hard drive. It contains the raw data (the operating system, applications, and user files) for your virtual machine. vmware flat file

: Unlike "sparse" disks that grow as you add data, a traditional flat file is thick-provisioned . It immediately occupies the full capacity assigned to the virtual disk on the physical storage, filled with zeros where data hasn't been written yet. Every virtual hard drive assigned to an ESXi

myVM.vmdk (descriptor – text) myVM-flat.vmdk (actual disk data – binary) It immediately occupies the full capacity assigned to

: A raw, pre-allocated binary extent. This hidden giant stores the actual guest operating system, application files, and production data.

Deleting or altering a flat file will corrupt the associated virtual machine. Always manage disks through vSphere or VMware tools.

Note: If you are using , you might see a -sesparse.vmdk or just the standard .vmdk growing over time instead of a static -flat.vmdk . The -flat extension is typical for "Thick Provision Lazy Zeroed" or "Thick Provision Eager Zeroed" disks.