Hi. I recently got my Samsung SP0802N 80 GB IDE/PATA hard disk replaced with a Samsung SP0822N (yup, SP0822N) 80 GB IDE/PATA hard disk. The problem is, when I power on the computer & while POST, the hard disk makes a single 'tuck' noise which also occurs when the computer is turned off. My previous SP0802N didn't make this noise. What does this mean? Is it normal? Does this mean that the given hard disk is refurbished/repaired?