I just got a new 80gb WesternDigital HardDrive, and I'm gonna replace my old 4gb slave with my new 80gb one. -My OS runs off a 20 gb WD(the master). -I remove my current 20 gb master and then install the new 80gb as the new master (jumpers settings = master/single). -I went into my BIOS and set the thing up by auto detecting the specs and it reads everything fine. -ran Fdisk, selected one of the options to partition, then formated it. -typed dir /p to make sure the format actually worked. (it shows that theres 0 folders and ~80gb of space, all is cool.) -change the jumpers to slave, put the old master back in (jumpers = master/with slave) -boot back into windows, goto 'My Computer' expecting to see the new slave, but theres nothing there, my old slave was D: but now its bumped my CD roms into D: and E:. now I know I'm obviously missing something, but I have no clue what. any help would be great.