VN(4)

NAME
vn - vnode disk driver

SYNOPSIS
pseudo-device vn [count]

DESCRIPTION
The vn driver provides a disk-like interface to a file. This is useful for a variety of applications, including swap files and building mini-root or floppy disk images.

This document assumes that you're familiar with how to generate kernels, how to properly configure disks and pseudo-devices in a kernel configuration file.

In order to compile in support for the vn, you must add a line similar to the following to your kernel configuration file:

    pseudo-device	vn	4	#Vnode driver

The count argument is how many vn's memory is allocated for a boot time. In this example, no more than 4 vn's may be configured.

There is a run-time utility that is used for configuring vn's. See vnconfig(8) for more information.

BUGS
The vn driver does not work if the file does not reside in a local filesystem.

FILES
/dev/{,r}vn* - vn device special files.

HISTORY
The vnode disk driver was originally written at the University of Utah.

SEE ALSO
MAKEDEV(8), config(8), fsck(8), mount(8), newfs(8), vnconfig(8).