February 25, 2007 MD 4

### NAME

md - memory disk driver

### SYNOPSIS

pseudo-device md[ count]

### 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.

### SEE ALSO

options(4), mdconfig(8), mdsetimage(8)