Thread: Help with this hard disk

I have two hard drives 40GB as main, and 80GB as slave. But when I connected them to PC it shows an error that there is no OS in PC. So I want to know why my slave hard disk acting as master. Any help will be appreciated.

Go to bios and alter first hdd to boot, which is 40 GB. Now go to ide config and check there if 40 GB hdd is set to master or slave. If it is not set as master then set it.