Installation guide

# mount -t nfs -o rw acton:/usr/homer /homer
Refer to the mount(8) reference page for more information on general
options and options specific to a file system type.
See Section 7.10 for information about how this command interacts with
overlapping partitions.
7.4.2 Using the umount Command
Use the umount command to unmount a file system. You must unmount a
file system if you want to check it with the fsck command or if you want
to change its partitions with the disklabel command. The umount
command has the following syntax:
umount
[- afv ][-h host ][-t type ][mount_point ]
If any user process (including a cd command) is in effect within the file
system, you cannot unmount the file system. If the file system is in use
when the command is invoked, the system returns the following error
message and does not unmount the file system:
mount device busy
You cannot unmount the root file system with the umount command.
7.5 Tuning File Systems
To enhance the efficiency of UFS reads, use the tunefs command to
change a file system’s dynamic parameters, which affect layout policies.
The tunefs command has the following syntax:
tunefs
[-a maxc ][-d rotd ][-e maxb
][-m minf ][-o op t][file_s ]
You can use the tunefs command on both mounted and unmounted file
systems; however, changes are applied only if you use the command on
unmounted file systems. If you specify the root file system, you must also
reboot to apply the changes.
You can use command options to specify the dynamic parameters that
affect the disk partition layout policies. Refer to the tunefs
(8) reference
page for more information on the command options.
7.6 Maintaining Disks
The radisk program and the scu program allow you to maintain your
Digital Storage Architecture (DSA) and Small Computer System Interface
(SCSI) disk devices, respectively.
7–20 Administering the UNIX File System