PS: I have think that blinks only if  the Hdisk it work, 
           but it blinks always, its true ?! 
   
   or its possible to change the led impuls ??


from options(4):

     options BLINK
     Enable blinking of LED.  Blink rate is full cycle every N seconds for N <
     then current load average.  See getloadavg(3).


if you change the code in auxreg.c (see the blink() function) you can
make it blink on whatever you want....


.mrg.