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VN(4)		      DragonFly Kernel Interfaces Manual		 VN(4)

NAME

vn -- vnode disk driver

SYNOPSIS

pseudo-device vn [n] Alternatively, to load the driver as a module at boot time, place the following line in /boot/loader.conf: vn_load="YES"

DESCRIPTION

The vn driver uses swap or a file as backing store to abstract-out a device which may then be used like a disk. The vn driver supports both labeled and unlabeled pseudo-disks and is useful for a variety of appli- cations, including swap files and building mini-root, floppy, or CD-ROM disk images. vn may also be used to create temporary swap-backed filesystems, such as /tmp, in a somewhat less memory-hungry manner than MFS. The vn driver supports autocloning. By default 4 vn devices are also precreated.

FILES

/dev/vn* vn device special files

SEE ALSO

fsck(8), mount(8), mount_mfs(8), newfs(8), vnconfig(8)

HISTORY

The vnode disk driver was originally written at the University of Utah and was substantially modified by FreeBSD developers to add swap-backed support.

BUGS

The vn driver does not work if the file does not reside in a local filesystem. DragonFly 3.9 September 28, 2009 DragonFly 3.9