Firmware 4SDM1 or 5SDM1 fixes clicking noise on Seagate 2.5" 7200RPM HDD's Model #'s: 80G - ST980412ASG DP/N FC63Y 160G - ST9160412ASG DP/N C384R 250G - ST9250410ASG DP/N C385R 320G - ST9320423ASG DP/N C386R 500G - ST9500420ASG DP/N D111N