Hi,
welcome to the communities,
you shouldn't mount a single virtual disk to multiple VMs, as the filesystem inside the disk is probably not made for multi access.
I would go with a NFS share, as it's built for multiple access and it's faster than samba. (Was there a reason to choose samba and not NFS when you use linux boxes?)
Tim
Edit: Discussion successfully moved from VMware vCloud Director to VMware vSphere™ Storage