Thanks folks.
On 9/13/07, Miod Vallat  wrote:

quoted text
> > I'd like to know why /dev/cd0a and /dev/rcd0a device files (at my

> > machine) refer to the same physical device, given that one is not a

> > symlink to the other one, and vice-versa, and also given that cd0a is

> > a block device and rcd0a is a character device.

>

> The kernel handles two kinds of device nodes: ``block'' devices and

> ``character'' devices. The major numbers of these devices are

> platform-dependant, and must match the bdevsw[] and cdevsw[] arrays

> in sys/arch///conf.c.

>

> Storage devices can be accessed either as block devices or character

> devices, hence they have one entry in each of these tables. Their major

> numbers do not need to match since these are completely independant

> numbering spaces.

>

> Miod

>

--

Joco Salvatti

Undergraduating in Computer Science

Federal University of Para - UFPA

web: http://www.openbsd-pa.org

e-mail: salvatti@openbsd-pa.org