#!/bin/sh#author:reed #blog:luweikai.blog.51cto.com #說明：使用自帶的dd命令file=dd.file BS_COUNT_8K=(8K?12K) BS_COUNT_64K=(64K?6K) BS_COUNT_1M=(1M?1K) list="8K?64K?1M" wlog=/tmp/ddwrite.log rlog=/tmp/ddread.log #write Write() {echo?"[INFO]WRITE"for?i?in?$list;dobs=$(eval?echo?\$\{BS_COUNT_$i\[0\]\})count=$(eval?echo?\$\{BS_COUNT_$i\[1\]\})echo?"dd?if=/dev/zero?of=$file?conv=fsync?oflag=direct?bs=$bs?count=$count"dd?if=/dev/zero?of=$file?conv=fsync?oflag=direct?bs=$bs?count=$count?2>>$wlogecho?"?"#echo?"sleep?3"sleep?3done } #read Read() {echo?"[INFO]READ"for?i?in?$list;dobs=$(eval?echo?\$\{BS_COUNT_$i\[0\]\})count=$(eval?echo?\$\{BS_COUNT_$i\[1\]\})echo?"dd?if=$file?of=/dev/null?iflag=direct?bs=$bs?count=$count"dd?if=$file?of=/dev/null?iflag=direct?bs=$bs?count=$count?2>>?$rlogecho?"?"#echo?"sleep?3"sleep?3done } Write|tee?-a?$wlog echo?"please?wait?5?seconds......" sleep?5 Read|tee?-a?$rlog

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