RD(4) BSD Programmer's Manual RD(4)
rd - ramdisk driver
pseudo-device rd [count]
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.
/dev/rd?? block mode ramdisk devices. /dev/rrd?? raw mode ramdisk devices.
The rdsetroot tool is available as part of the distribution toolset. MirOS BSD #10-current May 14, 2001 1
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