| MD(4) | Kernel Interfaces Manual | MD(4) | 
NAME
 md — memory disk driver
SYNOPSIS
 pseudo-device md
DESCRIPTION
 The 
md driver enables use of system or user memory as a disk. Memory for the disk must be allocated within the kernel or with 
mdconfig(8) before the 
md device may be used as a disk. Its behaviour is configured by the kernel options 
MEMORY_DISK_HOOKS, 
MEMORY_DISK_IS_ROOT, 
MEMORY_DISK_ROOT_SIZE, 
MEMORY_DISK_DYNAMIC, and 
MEMORY_DISK_SERVER.
 
FILES
- 
/dev/md??
- 
block mode memory disk devices.
- 
/dev/rmd??
- 
raw mode memory disk devices.