Hi frds i need ur help on this..!
I am using redhat 9.0 recently someone has messed with mine filesystem and anyhow managed to hide mine linux partition both hd0,0 and hd0,1 ..!This is sick..i got mine Xp partition also hidden by this. I tried booting with linux rescue disk..but fail to mount to sys/image as it say there is no linux image found on disk. I check out mine disk with df -a command but i cant find mine ext3 partition..Can any one of u guys help me with this issue..i dont wont to format my system...! 
'df' only shows mounted filesystems, so won't help you much. 'fdisk -l' will show all disks, mounted or not, can you tell me what it prints? That would be much more useful.
Thanks for the reply ...I will be updating you on this ..once i get it done..!