mount_hfs(1M) mount_hfs(1M)
NAME [Toc] [Back]
mount_hfs: mount, umount - mount and unmount HFS file systems
SYNOPSIS [Toc] [Back]
/usr/sbin/mount [-l] [-p|-v]
/usr/sbin/mount -a [-F hfs] [-eQ] [-f]
/usr/sbin/mount [-F hfs] [-eQrV] [-f] [-o specific_options]
{special|directory}
/usr/sbin/mount [-F hfs] [-eQrV] [-f] [-o specific_options]
special directory
/usr/sbin/umount -a [-F hfs] [-v]
/usr/sbin/umount [-v] [-V] {special|directory}
DESCRIPTION [Toc] [Back]
The mount command mounts file systems. Only a superuser can mount
file systems. Other users can use mount to list mounted file systems.
The mount command attaches special, a removable file system, to
directory, a directory on the file tree. directory, which must
already exist, will become the name of the root of the newly mounted
file system. special and directory must be given as absolute path
names. If either special or directory is omitted, mount attempts to
determine the missing value from an entry in the /etc/fstab file.
mount can be invoked on any removable file system, except /.
If mount is invoked without any arguments, it lists all of the mounted
file systems from the file system mount table, /etc/mnttab.
The umount command unmounts mounted file systems. Only a superuser
can unmount file systems.
Options (mount) [Toc] [Back]
mount recognizes the following options:
-a Attempt to mount all file systems described in
/etc/fstab. All optional fields in /etc/fstab
must be included and supported. If -F hfs is
specified, all HFS file systems in /etc/fstab are
mounted. If noauto is specified in an entry's
option list, this entry is skipped. File systems
are not necessarily mounted in the order listed in
/etc/fstab.
-e Verbose mode. Write a message to standard output
indicating which file system is being mounted.
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-f Force the file system to be mounted, even if the
file system clean flag indicates that the file
system should have fsck run on it before mounting
(see fsck(1M)). This option is valid only on HFS
file systems.
-F hfs Specify the HFS file system type (see fstyp(1M)).
-l Limit actions to local file systems only.
-o specific_options
Specify options specific to the HFS file system
type. specific_options is a list of comma
separated suboptions and/or keyword/attribute
pairs intended for the HFS specific module of the
command.
The following specific_options are valid on HFS
file systems.
defaults Use all default options. When
given, this must be the only option
specified.
rw Mount read-write (default).
ro Mount read-only.
suid Allow set-user-ID execution
(default).
nosuid Do not allow set-user-ID execution.
behind Enable, where possible,
asynchronous writes to disk. This
is the default on 700 systems.
delayed Enable delayed or buffered writes
to disk. This is the default on
800 systems.
fs_async Enable relaxed posting of file
system metadata.
no_fs_async Enable rigorous posting of file
system metadata. This is the
default.
largefiles Attempt to enable the creation of
files greater than 2 gigabytes in
size. File systems have to be
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created or configured to enable
large files (see mkfs_hfs(1M) and
fsadm_hfs(1M)).
nolargefiles Attempt to disable the creation of
files greater than 2 gigabytes in
size. File systems have to be
created or configured to disable
large files. (see mkfs_hfs(1M) and
fsadm_hfs(1M)).
quota Enable disk quotas (valid only for
rw file systems).
noquota Disable disk quotas (default).
Mounting with the quota option also enables quotas
for the file system, unlike some other systems,
which require the additional invocation of the
quotaon command after the file system has been
mounted (see quotaon(1M)). Running quotaon does
no harm, but it is not necessary.
-p Report the list of mounted file systems in the
/etc/fstab format.
-Q Prevent the display of error messages resulting
from an attempt to mount already mounted file
systems.
-r Mount the specified file system as read-only.
This option is equivalent to the -o ro
specific_option. Physically write-protected file
systems must be mounted in this way or errors
occur when access times are updated, whether or
not any explicit write is attempted.
-v Report the regular output with file system type
and flags; however, directory and special fields
are reversed.
-V Echo the completed command line, but performs no
other action. The command line is generated by
incorporating the user-specified options and other
information derived from /etc/fstab. This option
allows the user to verify the command line.
Options (umount) [Toc] [Back]
umount recognizes the following options:
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-a Attempt to unmount all file systems
described in /etc/mnttab. All optional
fields in /etc/mnttab must be included
and supported. If -F hfs is specified,
all HFS file systems in /etc/mnttab are
unmounted. File systems are not
necessarily unmounted in the order
listed in /etc/mnttab.
-F hfs Specify the HFS file system type (see
fstyp(1M)).
-v Verbose mode. Write a message to
standard output indicating which file
system is being unmounted.
-V Echo the completed command line, but
performs no other action. The command
line is generated by incorporating the
user-specified options and other
information derived from /etc/fstab.
This option allows the user to verify
the command line.
DIAGNOSTICS [Toc] [Back]
umount complains if the special file is not mounted or if it is busy.
The file system is busy if it contains an open file or some logged-in
user's working directory.
EXAMPLES [Toc] [Back]
Mount a local HFS disk:
mount -F hfs /dev/dsk/c0t0d4 /usr
Unmount a local HFS disk:
umount /dev/dsk/c0t0d4
WARNINGS [Toc] [Back]
Some degree of validation is done on the file system, however, it is
generally unwise to mount file systems that are defective, corrupt, or
of unknown origin.
AUTHOR [Toc] [Back]
mount was developed by HP, AT&T, the University of California,
Berkeley, and Sun Microsystems.
FILES [Toc] [Back]
/etc/fstab Static information about the file systems
/etc/mnttab Mounted file system table
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mount_hfs(1M) mount_hfs(1M)
SEE ALSO [Toc] [Back]
fsclean(1M), mount(1M), mkfs_hfs(1M), fsadm_hfs(1M), quotaon(1M),
mount(2), fstab(4), mnttab(4), fs_wrapper(5), quota(5).
STANDARDS CONFORMANCE [Toc] [Back]
mount: SVID3
umount: SVID3
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