Microsoft Azure Development Cookbook Second Edition

Using local storage in an instance

The Microsoft Azure Fabric Controller deploys an instance of a Microsoft Azure role onto a virtual machine (VM) as three Virtual Hard Disks (VHD). The guest OS image is deployed to the D drive, the role image is deployed to the E or F drive, while the C drive contains the service configuration and the local storage available to the instance. Only code running with elevated privileges can write anywhere other than the local storage.

Tip

As Azure could change the way it manages the underlying operating system of Cloud Services, the information provided about filesystem topology could change suddenly with no obligation from Microsoft to explain it.

Each instance has read-write access to a reserved space on the C drive. ...