umm thats terrible.
but you said you have 2 disks? may be the data is still on the 2nd disk?same thing happened to me but on a test machine...
I know I have 2 disks also but my 2nd one does not show until I run the GUI (xdm) then when I go to my Places(Computer) I see my 2nd hard disk.
I am not sure why it does not mount and only mounts when I run the xwindows?
may be run the X and re-check?
PS when I do cd /media and do ls I see only cdrom0 and floppy0 and some links to them & nothing else.
but when I go to the Windows and look into Computer it shows me my 2nd disk.
then if I go back to /media and do an ls I see a disk there? when I cd to disk I see all my data in there no problem!?