The topology editor creates a matching bound virtual image unit (Figure 20) that contains disk definition units and network connection units, according to the data in the virtual image file.

Section is the unit to allocate disk space. It makes the distribution of data blocks on disk more continuous and enhances the efficiency of large file access.

Thereafter, the controller searches a storage unit, such as a hard disk, for a file name having the same content name as that of the loaded recording medium.