IFS - Installable File System Mechanism

The OS/2 Installable File System (IFS) Mechanism supports the following:
 * Coexistence of multiple, active file systems in a single PC
 * Multiple logical volumes (partitions)
 * Multiple and different storage devices
 * Redirection or connection to remote file systems
 * File system flexibility in managing its data and I/O for optimal performance
 * Transparency at both the user and application level
 * Standard set of File I/O API
 * Existing logical file and directory structure
 * Existing naming conventions
 * File system doing its own buffer management
 * File system doing file I/O without intermediate buffering
 * Extensions to the Standard File I/O API (FSCTL)
 * Extensions to the existing naming conventions
 * IOCTL type of communication between a file system and a device driver