[Samba] Query if pre-allocation can be turned off from Windows Server / PC to SAMBA share

[Michael Crean]

Morning All
We have an older transcode application that uses watch folders. it checks in every 10 seconds to watch folder. if it sees a new file, it will monitor it to see when it will stop growing and 30 seconds later pick it up for transcoding / encoding. Design was to have uploads to watch folder from PC and MACs. I wanted to know if there was a way to turn off pre-allocation when copying from a Windows PC to a samba share? I sense it cannot as Windows Explorer seems to default to pre-allocation before copying.  We are running RHEL  2.6.32, SAMBA 4.1.14 and GPFS as the filesystem.
We have performed tests using NFS and by default it grows files. I know the protocols are different. 
I sense this is a windows problem and not samba and just need to rule it out.
creany