hi, i have 2 hd on my computeur : /dev/hda 40go ( linux systeme partition ext3 ) /dev/hdb 80go ( linux partition ext3 ) my /dev/hdb have four principal partition ( 4x20go) now i would like 2 partions, but i try : fdisk /dev/hdb - delette all partition - write info on Hd after i ve rebooted my computer and i run another time : fdisk /dev/hdb - create partition but fdisk read my old partition and allocate only 20go, why ? i try after created my new partition 20go to mount this on my system, but this partition is not empty .... :( on linux, how to make for broken my mbr of this HD ? or how to make for to have 2 partitions instead of 4 on my HD ? thank for your answer priou alexandre