Are you sure that the drive isn't being detected but not being SELECTED as the boot drive? Most older MBs will default to the PATA primary cable to search for the boot disk. When you fist boot up, enter the BIOS. If, under the STANDARD CMOS FEATURES option, you do not see your SATA drive listed, then check the data and power cable connections to the SATA drive. If it still is not, there, then, in the CMOS, check under the INTEGTATED PERIPHERALS to ensure that the ON-CHIP SATA option is enables (or AUTO). If the drive IS there, but just not booting, then, under the ADVANCED BIOS FEATURES, check and ensure that the SATA drive is listed as the FIRST BOOT DEVICE. If it is not, follow screen direction to change the first boot device to the SATA HDD.