Installation guide

DIGITAL UNIX file system is contained on a separate line in the fstab
file. The contents and field ordering of the line are different between
DIGITAL UNIX and ULTRIX systems. On DIGITAL UNIX systems, you
separate fields on a line with spaces or tabs. On ULTRIX systems, you
separate fields by using a colon. See fstab
(4) for more information.
4.8.5 Differences in Monitoring File System Use
Use the df and du commands to monitor file systems use. The DIGITAL
UNIX df command is similar to the ULTRIX df command, except that by
default the DIGITAL UNIX command displays statistics in 512-byte blocks
while the ULTRIX command displays them in units of 1024 bytes. Use the
−k option to display statistics in 1024-byte units. The DIGITAL UNIX
command supports options that are unavailable on an ULTRIX system,
including a −t option that allows you to specify that statistics be displayed
for a particular file system type. The DIGITAL UNIX du command is the
same as the ULTRIX du command, except that the DIGITAL UNIX
command supports options that are unavailable on ULTRIX systems. For
more information about these commands, see df
(1) and du(1).
4.8.6 Specifying Disk Quotas
You can specify file system disk quotas on a DIGITAL UNIX system. The
steps you take to activate file system disk quotas on a DIGITAL UNIX
system are similar to those on an ULTRIX system. For information about
activating disk quotas, see the System Administration manual.
4.8.7 Differences in Setting Up and Maintaining NFS Software
The DIGITAL UNIX Network File System (NFS) software is a facility for
sharing files in a heterogeneous environment of processors, operating
systems, and networks. The NFS software on a DIGITAL UNIX system is
similar to the NFS software on an ULTRIX system.
Sharing on a DIGITAL UNIX system is accomplished by mounting a
remote file system or directory on a local system and then reading or
writing the files as though they are local. You can use the DIGITAL UNIX
NFS software to mount remote ULTRIX file systems. You can also use NFS
software to mount DIGITAL UNIX file systems on an ULTRIX system.
However, if there are files greater than 2 gigabytes (GB) in size, the
ULTRIX users will be able to perform file operations only on the first 2 GB.
The DIGITAL UNIX NFS software supports two versions of the NFS
protocol: Version 2 and Version 3. NFS Version 2 protocol limits remote file
access to 2 GB, because of the 32-bit file size and offset fields in the
Overview of DIGITAL UNIX System and Network Administration 4–13