用dd命令测试磁盘写入性能

greensnow

而且同类型的测试结果的比较才有意义，hdparm和dd比是没有意义的

[ 本帖最后由 greensnow 于 2010-10-5 13:27 编辑 ]

greensnow

hdparm是可以读缓存的，所以是越来越快，你看我连续做的几次测试，你说这哪次才是准的呢
Timing buffered disk reads:  246 MB in  3.01 seconds =  81.70 MB/sec
[misuzu@www6379u ~]$ sudo hdparm -t /dev/hda2

/dev/hda2:
Timing buffered disk reads:  442 MB in  3.01 seconds = 147.08 MB/sec
[misuzu@www6379u ~]$ sudo hdparm -t /dev/hda2

/dev/hda2:
Timing buffered disk reads:  630 MB in  3.02 seconds = 208.36 MB/sec
[misuzu@www6379u ~]$ sudo hdparm -t /dev/hda2

/dev/hda2:
Timing buffered disk reads:  786 MB in  3.00 seconds = 261.67 MB/sec
[misuzu@www6379u ~]$ sudo hdparm -t /dev/hda2

/dev/hda2:
Timing buffered disk reads:  866 MB in  3.01 seconds = 288.02 MB/sec