I have just bought a Maxtor DM10 250gb harddrive to replace another broken drive. I already have one of these and have had no problems at all so decided on another. Plugged it all in, booted up and the bios detected no drives even though both were connected. The only way I can get it to see a drive is if I only connect my older DM10. Everytime I add the new one, with or without the other, it detects no drive. I have tried it set to both slave and master. What I don't understand is why it would stop the detection of my other drive? Any ideas oh wise ones?