I have installed a sata-disk with a promise SATA 150 TX-4 controller. At bios startup, the controller installs, but then when the system tries to boot (from a different disk and different controller - promise ULTRA 100 IDE), it just says "loading bootstrap" and then hangs. When I power off the SATA-Drive, the controller does not installs at bios startup (because the disk was the only one and it does not install without a disk) and then everything starts normal.

Reinhard Fischer