Hybrid Images

Hybrid images mix thin- and thick-image strategies. In a hybrid image, you configure the disk image to install applications on first run, giving the illusion of a thick image but installing the applications from a network source. Hybrid images have most of the advantages of thin images. However, they aren't as complex to develop and do not require a software distribution infrastructure. They do require longer installation times, however, which can raise initial deployment costs.

An alternative is to build one-off thick images from a thin image. In this case, you build a reference thin image. After the thin image is complete, you add core applications and then capture, test, and distribute a thick image. Testing is minimized because creating the thick images from the thin image is essentially the same as a regular deployment. Be wary of applications that are not compatible with the disk-imaging process, however.

If you choose to build hybrid images, you will store applications on the network but include the commands to install them when you deploy the disk image. This is different than installing the applications in the disk image. You are deferring application installs that would normally occur during the disk-imaging process to the image-deployment process. They become a postinstallation task. Also, if you have a systems-management infrastructure in place, you will likely use it to install supplemental applications post-deployment. In this scenario, see the following sections of this tutorial:

• See "Automating Installation" to learn how to install applications silently.
• See "Injecting in a Disk Image" to learn how to add applications to deployment shares you create by using MDT 2010 and install them during deployment.