This Xbox Hard Drive Replacement Guide mentions nothing about the ATA security employed by the original Xbox’s firmware that prevents easily swapping drives between different consoles. Without first unlocking and relocking the HDD to the new console’s motherboard (HDDKey), you cannot just swap HDDs from one to another.

kaos_engr - May 9

best comment so far swapping any xbox hard drive may it be the original xbox, xbox 360 etc is not as simple as this guide made it to be.