Overview

Digital UNIX Version 4.0 supports the following file systems which are accessed through the OSF/1 Version 1.0 Virtual File System (VFS):

• UNIX File System (UFS)

• Network File System (NFS)

• CD-ROM File System (CDFS)

• Memory File System (MFS)

• /proc File system (PROCFS)

• File-on-File Mounting File System (FFM)

• File Descriptor File System (FDFS)

• POLYCENTER Advanced File System (AdvFS)

Note that all of the file systems are integrated with the Virtual Memory Unified Buffer Cache (UBC).

In addition, Digital UNIX Version 4.0 supports Logical Storage Manager (LSM) and the Prestoserve file system accelerator.

Note that the Logical Volume Manager is being retired in this release.

The following sections briefly discuss VFS, the file systems supported in Digital UNIX Version 4.0, the Logical Storage Manager, and the Prestoserve file system accelerator.