HP-UX Reference (11i v1 05/09) - 1M System Administration Commands A-M (vol 3)

m
mount_vxfs(1M) mount_vxfs(1M)
NAME
mount, umount - mount and unmount a VxFS file system
SYNOPSIS
/usr/sbin/mount
[-l][-v|-p
]
/usr/sbin/mount
[-F vxfs ][-eQ] -a
/usr/sbin/mount
[-F vxfs ][-eQrV][
-o specific_options]{special|directory}
/usr/sbin/mount
[-F vxfs ][-eQrV][
-o specific_options] special directory
/usr/sbin/umount
[-V][-v]{special | directory }
/usr/sbin/umount
[-F vxfs ][-v]
-a
DESCRIPTION
mount attaches special, a removable file system, to directory, a directory on the file tree. (This directory
is also known as the mount point). directory, which must already exist, will become the name of the root of
the newly mounted file system. If either special or directory is omitted,
mount attempts to determine the
missing value from an entry in
/etc/fstab . mount can be invoked on any removable file system,
except /. special and directory must be given as absolute path names.
If mount is invoked with no arguments it lists all the mounted file systems from the mounted file system
table, /etc/mnttab .
The umount command unmounts mounted file systems.
Only the superuser can mount and umount file systems. Other users can use mount to list mounted file
systems.
Options
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 vxfs is specified, all VxFS file sys-
tems in /etc/fstab are mounted. If noauto is specified in an entry’s option list (in
/etc/fstab ), that entry is skipped (not mounted). File systems are not necessarily
mounted in the order listed in /etc/fstab.
-e Verbose mode. Write a message to the standard output indicating which file system is being
mounted.
-F vxfs
Specify the file system type (vxfs).
-l Limit actions to local file systems only.
-o specific_options
Specify options specific to the VxFS file system type. specific_options is a list of comma
separated suboptions and/or keyword/attribute pairs intended for the VxFS-specific module of
the command. Unlike some file system commands, multiple
-o options do not accumulate;
only the last option is used.
The following specific_options are valid on a VxFS file system:
blkclear
Clear all data extents before allocating them to a file (requires synchronous zeroing,
on disk, of certain newly allocated extents). This prevents uninitialized data from
being written to a file at the time of a system crash.
convosync=direct|dsync|unbuffered|closesync|delay
Alter the caching behavior of the file system for O_SYNC and O_DSYNC I/O
operations.
The direct value handles any reads or writes with the O_SYNC or O_DSYNC
flag as if the VX_DIRECT caching advisory is set.
The dsync value handles any writes with the O_SYNC flag as if the VX_DSYNC
caching advisory is set. It does not modify behavior for writes with O_DSYNC set.
HP-UX 11i Version 1: September 2005 − 1 − Hewlett-Packard Company Section 1M−−521