Commands Reference, Volume 3

lsfs Command

Purpose

Displays the characteristics of file systems.

Syntax

lsfs [ -q ] [ -c | -l ] [ -a | -v VfsType | -u MountGroup| [FileSystem...] ]

The lsfs command displays characteristics of file systems, such as mount points, automatic mounts, permissions, and file system size. The FileSystem parameter reports on a specific file system. The following subsets can be queried for a listing of characteristics:

All file systems
All file systems of a certain mount group
All file systems of a certain virtual file system type
One or more individual file systems

The lsfs command displays additional Journaled File System (JFS) or Enhanced Journaled File System (JFS2) characteristics if the -q flag is specified.

You can use a Web-based System Manager File Systems application (wsm fs fast path) to run this command. You could also use the System Management Interface Tool (SMIT) smit lsfs fast path to run this command.

Implementation Specifics

JFS is POWER-based platform only, and JFS2 is common to both platforms.

Flags

-a	Lists all file systems (default).
-c	Specifies that the output should be in colon format.
-l	Specifies that the output should be in list format.
-q	Queries the logical volume manager (LVM) for the logical volume size (in 512-byte blocks). Additional information is provided for JFS and JFS2 file systems. Queries the JFS superblock for the file system size, the fragment size, the compression algorithm (if any), and the number of bytes per i-node (nbpi). Queries the JFS2 superblock for the file system size, the file system block size, and sparse file support. This information is not reported for other virtual file system types. It is displayed in addition to other file system characteristics reported by the lsfs command.
-u MountGroup	Reports on all file systems of a specified mount group.
-v VfsType	Reports on all file systems of a specified type.

Examples

To show all file systems in the /etc/filesystems file, enter:
```
lsfs
```
To show all file systems of vfs type jfs, enter:
lsfs -v jfs
To show the file system size, the fragment size, the compression algorithm (if any), and the number of bytes per i-node as recorded in the superblock of the root file system, enter:
lsfs -q /

Files

/etc/filesystems

Lists the known file systems and defines their characteristics.

Related Information

The chfs command, crfs command, rmfs command.

File Systems Overview for System Management in AIX 5L Version 5.1 System Management Concepts: Operating System and Devices explains file system types, management, structure, and maintenance.

Mounting Overview in AIX 5L Version 5.1 System Management Concepts: Operating System and Devices explains mounting files and directories, mount points, and automatic mounts.

For information on installing the Web-based System Manager, see Chapter 2: Installation and System Requirements in AIX 5L Version 5.1 Web-based System Manager Administration Guide.

System Management Interface Tool (SMIT): Overview in AIX 5L Version 5.1 System Management Concepts: Operating System and Devices explains SMIT structure, main menus, and tasks.