Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90051)

176 Chapter9
Describing Asynchronous Devices
How the File System Manages Information
How the File System Manages Information
The file system is the part of the MPE/iX operating system that
manages information being stored or transferred. It handles various
input/output operations, such as passing information to and from user
processes. All input and output operations are done through files. Files
can be kept in any storage medium and accessed by any input/output
peripheral device.
Two basic types of files exist:
• Disk files. These are files residing on disk, immediately accessible to
the system and potentially shareable by several sessions or jobs at
the same time.
• Device files. These are files currently being input from or output to
any peripheral device except a disk.