Old PC, the CMOS battery will be flat and you will have lost the settings for the drives.
Even f you reset every time the PC boots it will be unable to retain the settings.
1. change the battery 2. boot to BIOS and set to the correct figures for your drives (If old enough to have parkable drives then BIOS will be too old to auto detect drives). Cylinder heads and sectors will be marked on a label on the drives. 3. save and exit BIOS and it should then boot.