/dev/fd0 Read-only file system???

Hi folks

I have a problem wit /dev/fd0. I am able to mount the device and even write to it. But when I want to use fdformat -s1.4m /dev/fd0 this is what I got:

can’t open drive /dev/fd0 Read only file system

the permison od /dev/fd0 is brw------. Evertynig what i try is under root privilages.

The same result I got when I want to use ‘dd’ command

Any suggestions?