Hi! Major number tells you which driver is used to access the hardware. Each hardware is assinged a uniuqe major number. Minor number distinguishes b/w various hardware it controls. For example .. for a floppy drive major number is 5. so to access floppy drive kernel uses major number -- 5. while minor nubmer tells about the type of the floppy. minor number 2 -- may refer to 1.44MB minro number 3 -- may refer to 1.68MB Regards Chintan __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/