如何看懂

shell

hdparm -Tt /dev/hda

/dev/hda:
Timing buffer-cache reads:   1264 MB in  2.00 seconds = 632.00 MB/sec
Timing buffered disk reads:  160 MB in  3.06 seconds =  52.29 MB/sec


这两句怎么比较,,是硬盘的速度还是 ?

别人怎么跟我相差那么多 ?