I was running windows xp home edition on my 80gb 7200rpm pata hard drive and decided it would be good to have a backup hard drive in case my hard drive died. needless to say i didn't feel like wasting one of my windows installs on a computer i wouldnt ever use, so i installed ubuntu 8.04 off a friends allready downloaded cd. install went smoothly and everything went fine. heres where i think i made a mistake. I booted up in ubuntu with my 12gb quantum fireball old as the hills hard drive and had my 80gb hard drive set up as a slave. I was curious whether or not ubuntu would run a .exe file so i attempted to open up my 80gb hard drive in ubuntu which still had windows xp on it. Ubuntu didn't like it and quickly refused telling me it was "unable to mount the drive". OK i said no big deal turned off computer and switched back to the 80gb hard drive as my master and POOF "primary drive 0 not found" . awesome i did something wrong. checked the connections and everything was soundly plugged in. went into the BIOS and it didn't feel like recognizing the drive either. needless to say i am a bit flustered over this whole situation and being limited to 12gb of hard drive space (9gb with ubuntu installed) is utterly unacceptable. Any help would be greatly appreciated. I hope this is enough information for someone to diagnose my problems. (i cannot go out and buy a new hard drive or trust me, i would)