Before you can use MDT 2010 to deploy Windows 7, you must create a deployment share. A deployment share is a repository for the operating system images, language packs, applications, device drivers, and other software that will be deployed to your target computers. Deployment shares are new in MDT 2010 and consolidate two separate features found in MDT 2008:
Distribution share Contains operating system source files, application source files, packages, and out-of-box drivers.
Deployment point Contains files needed to connect to the distribution share and install a build from it.
By consolidating these two separate features into a single feature (the deployment share), MDT 2010 simplifies the deployment process. ...