vmx file using absolute paths for scsi.fileName

Hi There

I've noticed in some virtual machines .vmx files that the value for the attribute scsi0:0.fileName is using a full absolute path where in other cases it's just uses the name (see below).

EXAMPLE USES FULL PATH

vmx file:

scsi0:0.fileName = "/vmfs/volumes/53bb9045-9b237bb4-4aa2-982be10ff62a/<vm-folder>/<vm-name>.vmdk"

EXAMPLE USES JUST THE NAME (PREFERRED)

vmx file:

scsi0:0.fileName = "<vm-name>.vmdk"

What situation would cause vSphere to write the full absolute path I.E. '/vmfs/volumes/xxxxxx-xxxxx-xxxx-xxxxx/vm-folder/vm-name.vmdk in the .vmx file appose to just writing the vm-name.vmdk name?

Cheers,

Dean