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System Management Concepts: Operating System and Devices

File Systems for BSD 4.3 System Managers

This information offers a brief comparison of file systems for this operating system to other system file systems, and an outline of the supported file system types on this operating system.

This operating system uses the /etc/filesystem file to list file system device information, and has similar commands for mounting and unmounting file systems.

/etc/filesystems File and /etc/fstab File

4.3 BSD systems store lists of block devices and mount points in the /etc/fstab file.

SVR4 systems stores block devices and mount point information in /etc/vfstab file.

This operating system stores block device and mount points information in /etc/filesystems file. The crfs, chfs, and rmfs commands update the /etc/filesystems file.

4.3 BSD system administrators might be interested in the check variable in the /etc/filesystems file. The check variable can be set to the value True, False or to a number. For example, you can specify check=2 in the /etc/filesystems file. The number specifies the pass of the fsck command that will check this file system. The check parameter corresponds to the fifth field in an /etc/fstab file record.

There is no dump frequency parameter in the /etc/filesystems file.

File System Support on this operating system

This operating system supports disk quotas.

This operating system does not allow mounting of diskettes as file systems.

The syntax of themount and umount commands for this operating system differs from 4.3 BSD and from SVR4 versions of these commands. The commands to mount and unmount all file systems at once are shown for all three systems in the following table:

mount and unmount Commands
Function Syntax for this operating system 4.3 BSD Syntax SVR4 Syntax
mount all file systems mount all mount -a mountall
unmount all file systems umount all umount -a umountall

See the File Systems Overview for more information.

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