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RD(4)		       FreeBSD Kernel Interfaces 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 tool.

FILES
     /dev/rd??	    Block mode ramdisk devices.
     /dev/rrd??	    Raw	mode ramdisk devices.

SEE ALSO
     elf(5), rdsetroot(8)

FreeBSD	13.0			April 16, 2019			  FreeBSD 13.0

NAME | SYNOPSIS | DESCRIPTION | FILES | SEE ALSO

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<https://www.freebsd.org/cgi/man.cgi?query=rd&sektion=4&manpath=OpenBSD+6.9>

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