mount(1M) — ADMINISTRATOR COMMANDS

NAME

mount (ufs) − mount ufs file systems

SYNOPSIS

mount [−F ufs] [generic_options] [−r] [−o specific_options] { special|mount_point }
mount [−F ufs] [generic_options] [−r] [−o specific_options] special mount_point

DESCRIPTION

generic_options are options supported by the generic mount command. mount attaches a ufs file system, referenced by special, to the file system hierarchy at the pathname location mount_point, which must already exist. If mount_point has any contents prior to the mount operation, these remain hidden until the file system is once again unmounted.

The options are:

−F ufs
Specifies the ufs-FSType.

−r Mount the file system read-only.

−o Specify the ufs file system specific options in a comma-separated list. If invalid options are specified, a warning message is printed and the invalid options are ignored. The following options are available:

f Fake an /etc/mnttab entry, but do not actually mount any file systems. Parameters are not verified.

n Mount the file system without making an entry in /etc/mnttab.

rw|ro Read/write or read-only. Default is rw.

nosuid By default the file system is mounted with setuid execution allowed. Specifying nosuid overrides the default and causes the file system to be mounted with setuid execution disallowed.

remount Used in conjunction with rw. A file system mounted read-only can be remounted read-write. Fails if the file system is not currently mounted or if the file system is mounted rw.

clsize=n This option is used to specify a cluster size (in file system blocks) to be used for read-ahead and write-behind operations. A number between 1 and 255 can be specified for n. By specifying this option, read clustering is automatically enabled. To enable write clustering, an appropriate dpolicy must also be specified. In general, clustering works best when a file system has been built with a gap size of 0 (see mkfs_ufs(1M)). By default, a cluster size of 1 is used.

dpolicy=x
This option is used to specify the page caching policy to be used for data pages written to this file system. The possible options for x are sync (synchronously write through the page cache), async (asynchronously write through the page cache), or cpback (delay the write to disk until the page is reused by the system). Specifying cpback or async allows the system to use efficient clustering techniques to flush the data to disk. By default, a data policy of async is used.

mdpolicy=x
This option is used to specify the write policy to be used for file system meta-data (inodes and directories). The possible options for x are sync (synchronously write meta-data to disk), async (asynchronously write meta-data to disk), or cpback (delayed write). By default, a meta-data policy of sync is used.

NOTES

If the directory on which a file system is to be mounted is a symbolic link, the file system is mounted on the directory to which the symbolic link refers, rather than on top of the symbolic link itself.

FILES

/etc/mnttab mount table

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