I tried it... even if i had a 3.4 gb linux ext2 partition, the fdisk will read like this
ext dos 3.4 gb
U have total 945 mb of free disk space.

even after deleting all partitions through fdisk / mandrake disk (i tried both ways) to clear all hard disk without any partitions at all, even then i got only this 945 mb in fdisk.

when i tried to create an fat32 partition through linux disk and try to install win 98 , the set up pgm can't format my hdd saying the clustering information is not correct but linux shows no problems for hdd. That makes me feel that it is got something to do with low level formatting but i don't know how.. when using pqmagic also , if i had an ext2 then it will show as ext dos. if it has no partitions, then only the 945 mb is shown in pqmagic...
does ndd help in this