I AM WORKING ON A DELL SYSTEM WHICH ITS OWN HDD IS BAD, & I OPTED FOR ANOTHER HDD FROM ONE OF MY OLD WORKING SYSTEM & INSTALLED IT ON THE DELL SYSTEM.I THEN INCERT MY OS OF XP INTO TNE CD ROM BUT TO MY GREATEST SUPPRISE, THE HDD WAS NOT RECOGNIZED. WHAT IS PROBABLY THE CAUSE? & THE PREFERRABLE SOLUTION.