6.2.1 system directory network better. (Single-Level Directory Systems)
system is a system where a single directory structure as simple as possible. Within the system, there is only one directory, all files and gather at Ch. All files are stored on the same level. The storage in this way makes it easy for multiple users, each with several files. Multiple file types to the mix makes it easy to search. Moreover, in the case of creating a file with the same name that existed before the old files may be overwritten by mistake. Cause data loss problems can be solved by using the following directory 6.2.2. System directory level 2 (Two-Level Directory Systems) infrastructure is a problem in the system directory, the directory first, but not a hundred percent. The two-level directory structure to assign each user can create their own sub-directories called. "Chop directory" (Sub-directory) or subdirectory. Each directory chopped It is under the root directory of the same (root directory) inside the chopper directory, users can specify the file name as you want without having to worry about going over the names of anyone, because even if the same name file in the directory, it will not. Crashes overwriting data loss. However, the directory is still a problem again is if the user has multiple file types are indistinguishable types of files. As needed For example, Each student has a course of study. Courses can not separate the various classes To save hack into the directory. Works are mixed in the same directory 6.2.3. The system of multi-level directory (Hierarchical Directory System) to solve the system directory, the two systems mentioned above, the operating system would allow the creation of a directory structure like this. The directory structure is referred to as. "The structure of the mind" (Tree structure), users can create up Dobro, unlimited directory in the same directory. The file system currently in use this directory structure. You can solve all the existing problems pathname 6.2.4 (Path name) to refer to any file. It is necessary to specify that such files are correct in that directory. What directory or chopped In determining an address or a path to access the file, you learn that the "path" (path) to the system that you want to refer to any file on the disk is essential that you have to tell the path is correct. If you define a desired file name alone is not enough to go into the file. Do not forget that you can create a unique file name in the case of those files in different directories each other. Tell path to the system that you're referring to the file and where in the system refer to the file name are two ways, first the claim file absolute (absolute path name) and claim the title relative (. relative path name) claimed absolute file name. In a reference file, starting from the root (root) always followed by chopped down to sub-directory under the directory hierarchy created until the directory where the files contained. And warming by the end of the file name, for example, you have a system directory Figure 6.2 To refer to a file named dict.doc you can refer to it by the operating system Windows (MS DOS) user lib dict.doc in the system. OS UNIX /user/lib/dict.doc operating system MULTICS lib> dict.doc.
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