mount_hfs(1M) mount_hfs(1M)
NAME
mount_hfs: mount, umount - mount and unmount HFS file systems
SYNOPSIS
specific_options] {special|directory}
specific_options] special directory
{special|directory}
DESCRIPTION
The command mounts file systems. Only a superuser can mount file systems. Other users can use to list mounted file systems.
The 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, attempts to determine the missing value from an entry in the file. can be invoked on any removable file
system, except
If is invoked without any arguments, it lists all of the mounted file systems from the file system mount table,
The command unmounts mounted file systems. Only a superuser can unmount file systems.
Options (mount)
recognizes the following options:
Attempt to mount all file systems described in
All optional fields in must be included and supported. If is specified, all HFS file systems in are mounted. If is
specified in an entry's option list, this entry is skipped. File systems are not necessarily mounted in the order
listed in
Verbose mode. Write a message to standard output indicating which file system is being mounted.
Force the file system to be mounted,
even if the file system clean flag indicates that the file system should have run on it before mounting (see
fsck(1M)). This option is valid only on HFS file systems.
Specify the HFS file system type (see
fstyp(1M)).
Limit actions to local file systems only.
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.
Use all default options.
When given, this must be the only option specified.
Mount read-write (default).
Mount read-only.
Allow set-user-ID execution (default).
Do not allow set-user-ID execution.
Enable, where possible, asynchronous writes to disk.
Enable delayed or buffered writes to disk.
This is the default.
Enable relaxed posting of file system metadata.
Enable rigorous posting of file system metadata.
This is the default.
Attempt to enable the creation of files greater than 2 gigabytes in size.
File systems have to be created or configured to enable large files (see mkfs_hfs(1M) and
fsadm_hfs(1M)).
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)).
Enable user quotas
(valid only for file systems). HFS supports user quotas only.
Disable disk quotas (default).
Mounting with the option also enables quotas for the file system, unlike some other systems, which require the addi-
tional invocation of the command after the file system has been mounted (see quotaon(1M)). Running does no harm, but
it is not necessary.
Report the list of mounted file systems in the
format.
Prevent the display of error messages
resulting from an attempt to mount already mounted file systems.
Mount the specified file system as read-only.
This option is equivalent to the 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.
Report the regular output with file system type and flags;
however, directory and special fields are reversed.
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 This
option allows the user to verify the command line.
Options (umount)
recognizes the following options:
Attempt to unmount all file systems described in
All optional fields in must be included and supported. If is specified, all HFS file systems in are unmounted. File
systems are not necessarily unmounted in the order listed in
Specify the HFS file system type (see
fstyp(1M)).
Verbose mode. Write a message to standard output indicating which file system is being unmounted.
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 This
option allows the user to verify the command line.
DIAGNOSTICS
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
Mount a local HFS disk:
Unmount a local HFS disk:
WARNINGS
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
was developed by HP, AT&T, the University of California, Berkeley, and Sun Microsystems.
FILES
Static information about the file systems
Mounted file system table
SEE ALSO
fsadm_hfs(1M), fsclean(1M), mkfs_hfs(1M), mount(1M), quotaon(1M), mount(2), fstab(4), mnttab(4), fs_wrapper(5), quota(5), disk(7).
STANDARDS CONFORMANCE
mount_hfs(1M)