1.\" $NetBSD: vnd.4,v 1.1 1995/12/30 18:10:48 thorpej Exp $ 2.\" 3.\" Copyright (c) 1995 Jason R. Thorpe. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed for the NetBSD Project 17.\" by Jason R. Thorpe. 18.\" 4. Neither the name of the author nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.Dd December 30, 1995 35.Dt VND 4 36.Os NetBSD 37.Sh NAME 38.Nm vnd 39.Nd Vnode Disk Driver 40.Sh SYNOPSIS 41.Cd "pseudo-device vnd 4" 42.Sh DESCRIPTION 43The 44.Nm 45driver provides a disk-like interface to a file. This is useful for 46a variety of applications, including swap files and building miniroot 47or floppy disk images. 48.Pp 49This document assumes that you're familiar with how to generate kernels, 50how to properly configure disks and pseudo-devices in a kernel 51configuration file. 52.Pp 53In order to compile in support for the vnd, you must add a line similar 54to the following to your kernel configuration file: 55.Bd -unfilled -offset indent 56pseudo-device vnd 4 # vnode disk driver 57.Ed 58.Pp 59The count argument is how many 60.Nm vnds 61memory is allocated for a boot time. In this example, no more than 4 62.Nm vnds 63may be configured. 64.Pp 65There is a run-time utility that is used for configuring 66.Nm vnds . 67See 68.Xr vnconfig 8 69for more information. 70.Sh BUGS 71The 72.Nm 73driver does not work if the file does not reside in a local filesystem. 74.Sh FILES 75/dev/{,r}vnd* - vnd device special files. 76.Pp 77.Sh HISTORY 78The vnode disk driver was originally written at the University of 79Utah. 80.Sh SEE ALSO 81.Xr MAKEDEV 8 , 82.Xr config 8 , 83.Xr config.old 8 , 84.Xr fsck 8 , 85.Xr mount 8 , 86.Xr newfs 8 , 87.Xr vnconfig 8 . 88