Windows XP Home. Installed a second hard drive and checked cables and jumper settings. On boot up, pressed DEL key to bring up the BIOS. Ensured that the slave drive was on AUTO DETECT, then saved and exit. When the computer re-booted, the first DOS screen displays the make of the second hard drive OK, but then I noticed two lines which seem to display . . . Unable to boot from ATAPI - Failed. When Windows finally appears, there is no trace of the second hard drive. What is happening please? What can I check? Is my new hard drive faulty?