Embodiments are disclosed for a method. The method includes generating a backing layer having a file volume, in a layering file format and representing a portion of a volume snapshot that is backed up on a slower storage, and enabling an associated virtual machine. The method also includes generating an active layer comprising a second file volume, in the layering file format, representing a second portion of the volume snapshot, and enabling the associated virtual machine. The method further includes starting a process to pull a plurality of blocks from the backing layer to the active layer.