File system types

AIX® supports multiple file system types.

These include the following:

Journaled File System (JFS) or Enhanced Journaled File System (JFS2)

Supports the entire set of file system semantics. These file systems use database journaling techniques to maintain structural consistency. This prevents damage to the file system when the system is halted abnormally.

Each JFS or JFS2 resides on a separate logical volume. The operating system mounts the file system during initialization. This multiple file system configuration is useful for system management functions such as backup, restore, and repair, because it isolates a part of the file tree so that you can work on it.

JFS is the basic file system type that supports the entire set of file system commands.

JFS2 is the basic file system type that supports the entire set of file system commands.

A difference between JFS and JFS2 is that JFS2 is designed to support large files and large file systems.

Network File System (NFS)

Is a distributed file system that allows users to access files and directories located on remote computers and use those files and directories as if they were local. For example, users can use operating system commands to create, remove, read, write, and set file attributes for remote files and directories.

CD-ROM File System (CDRFS)

Allows access to the contents of a CD-ROM through the normal file system interfaces (open, read, and close).

DVD-ROM File System (UDFS)

Allows access to the contents of a DVD through the normal file system interfaces.