让磁盘硬盘灯常闪定位盘

通过dd来读取让硬盘灯闪来定位磁盘的位置

#!/bin/bash
hd=$1
for num in {1..5};do
        dd if="$hd" of="/dev/null" bs=4M count=1000 iflag=direct conv=noerror >/dev/null 2>&1
        sleep 1
done