I recently saved two 8500/120's from the scrap heap. They had no HDs but were loaded with a considerable amount of RAM 200+MB in each. I installed an Seagate 1 GB HD and an Quantum Fireball 540MB HD in one of them. I set the Seagate as the Master but I can not get the Quantum to mount. My OS is 8.1, it runs fine, but would like the extra HD for extra space. My question is what are the jumper settings for the Quantum, as a slave drive? The Quantum mounted once when installed and never again after that. The ID is 4 and Seagate (Master) is 2.