Installation guide

The newfs command is similar on DIGITAL UNIX and ULTRIX systems.
The DIGITAL UNIX command omits the −v option. For more information
about newfs, see newfs
(8).
4.8.3 Differences in Checking a UNIX File System
To check the integrity of a UNIX File System (UFS), use the fsck
command. The fsck command checks the integrity of UFS file systems.
This command can determine the type of a particular file system by using
information in the /etc/fstab file. Alternatively, you can specify options
on the fsck command line to indicate what type of file system you are
checking. The following table describes differences between the ULTRIX
and DIGITAL UNIX fsck command:
ULTRIX fsck Command DIGITAL UNIX fsck Command
Repeats the checking operation if it
makes repairs to the file system.
Does not perform this rescanning
operation.
Has file system clean byte aging, which
forces the file system to be checked with
fsck periodically.
Does not have clean byte aging; you
should run fsck on all file systems
periodically, even though fsck says the
file system is clean. Use fsck −o to force
checking.
For more information about fsck, see fsck(8).
4.8.4 Differences in Mounting and Unmounting a File System
You mount and unmount file systems on a DIGITAL UNIX system by using
the mount and umount commands. Like the ULTRIX mount command, the
DIGITAL UNIX mount command mounts the file system you specify or file
systems described in the fstab file. The mount and umount commands are
similar on DIGITAL UNIX systems and ULTRIX systems. For more
information, see mount
(8). You can mount an ULTRIX file system on a
DIGITAL UNIX system as described in Section 5.1.
_______________________ Note _______________________
You cannot mount a file system with a 4 kB block size on a
DIGITAL UNIX system. If you have any data that you need to
access and the data is on auxiliary disks in a file system with a
4 kB block size, you must dump the disk to tape or to a disk that
has a file system created with an 8 kB block size.
The format of the DIGITAL UNIX fstab file is different from the format of
the ULTRIX file. Like the ULTRIX fstab file, information about each
4–12 Overview of DIGITAL UNIX System and Network Administration