Sa ako lang ni na opinion ha, yes naay normal HDD ticking sound during activity and or head park. Ug dili gani noticeable ang sound don't bother, usually HDD make tiny noises. I have an 11 yrs old 40GB Maxtor HDD hantod karon buhi pa hehehe ug ako na noticed ani before naa cya'y weighing noise pero not really noticeable so why ni last man? why man uban diha nga silent hdd's guba man lage dayon. Basaha sa FAQ from WD and SEAGATE about sound issue, kay based sa ilang RMA daghang inuli na HDD was being checked but not defective, so balik ra gihapon nila from RMA.