Description of IBM NAS volume driver configuration options

Configuration option = Default value	Description
[DEFAULT]
ibmnas_platform_type = v7ku	(StrOpt) IBMNAS platform type to be used as backend storage; valid values are - v7ku : for using IBM Storwize V7000 Unified, sonas : for using IBM Scale Out NAS, gpfs-nas : for using NFS based IBM GPFS deployments.