RD(4)                     OpenBSD Programmer's Manual                    RD(4)

NAME
     rd - ramdisk driver

SYNOPSIS
     pseudo-device rd [count]

DESCRIPTION
     The rd driver enables use of system or user memory as a disk.  Memory for
     the disk must be allocated and initialized inside the kernel image at
     build-time using the rdsetroot (a.out(5)) or elfrdsetroot (elf(5)) tool.

FILES
     /dev/rd??   block mode ramdisk devices.
     /dev/rrd??  raw mode ramdisk devices.

SEE ALSO
     The rdsetroot and elfrdsetroot tools are available as part of the distri-
     bution toolset.

OpenBSD 4.7                      May 31, 2007                                1
