2,5" diskovi na 7.200 rpm su vrlo rijetke zvijeri. Tvoj (Travelstar 4K80-60) ima 4.200 rpm što kaže i sam Hitachi
http://www.hitachigst.com/hdd/support/table2.htm http://www.hitachigst.com/tech/techlib.nsf/techdocs/4E951A44FCD9169C86256D2D006B9EE8/$file/23fa_e2.pdf