Hello everybody! I would like to thank you for your help. I am now a proud admin of a /dev/md0 (RAID1) :) I would like to thank especially to : Allan <[EMAIL PROTECTED]> and to : Andy Poling <[EMAIL PROTECTED]> Kelina <[EMAIL PROTECTED]> Bruno Prior <[EMAIL PROTECTED]> whose hints helped me to solve my problem :) By the way: HAPPY NEW YEAR 2000 ! Wojtek -- *------< Wojciech Kus >-------*-------< [EMAIL PROTECTED] >---------*