Using Directories Disk File Structure The eV+ file structure is a hierarchical file system. Files and subdirectories are organized in a multilevel tree structure. In order to get to the files stored in lower levels, you must go through all the levels starting at the top. The top-level directory is called the root directory (it forms the root of the inverted tree). The root directory can contain files and other directories. Each directory under the root directory can also contain other directories and files. There are a few simple rules for using files and subdirectories: l Directories have the same naming requirements as files, except they cannot have an extension.
l At any one level, all directory and file names must be unique. l Each disk can have only one root directory. The following figure shows a simple directory structure. eV+Operating System User's Guide, v2.x, 18320-000 Rev A Page 40