I installed windows xp inadvertantly with the jumpers set to slave and it works fine but i have a back up hard drive so i put the jumpers to the master position and it wont boot up the bios finds it no problem but just wont boot
If your Mobo supports cable select, and the cable you have does also, then the jumper setting on the disk are over ridden/confused by the HDD's potition on the cable, if you have a cable select cable, a cable select mobo, and set jumpers to master or slave, but put a HDD jumpered as master on the slave end of the cable.
Start the computer and enter the bios. For primary master and primary slave change the settings to none, save settings and exit. The computer will re boot. Enter the bios again and change both settings from none to auto, save settings and exit.
Or you could set the drives ( jumpers) to cable select. The info will be on top of the hard drives.