zl1980 发表于 2003-4-26 18:40:44

我的硬盘速度不对头:(太快了)

我的硬盘速度不对头:
我用# hdparm -tT /dev/hda/dev/sda:
Timing buffer-cache reads: 128 MB in 1.25seconds =160.07 MB/sec
Timing buffered disk reads: 64 MB in 1.66 seconds = 38.55 MB/sec

有这么快吗?

llc 发表于 2003-4-26 19:12:16

正常,第一个是从硬盘自带的cache读进内存缓冲的,当然快
第二个是从硬盘直接读进内存,当然没那么快

我打开了DMA100,第二项是40.5MB/sec左右

cnhnln 发表于 2003-4-26 19:15:17

内存是DDR吧

Dragonfly 发表于 2003-4-27 02:27:57

hehe, mine
/dev/hda:
Timing buffer-cache reads:   128 MB in0.35 seconds =365.71 MB/sec
Timing buffered disk reads:64 MB in3.26 seconds = 19.63 MB/sec

mine is a laptop disk, so real disk read speed is slow. but my ddr seems to be much faster than yours

llc 发表于 2003-4-27 14:25:07

DDR怎么快这么多?还真是Double Speed

Dragonfly 发表于 2003-4-27 23:46:52

hehe, true ddr.

7299 发表于 2003-4-27 23:50:40

我的酷鱼7200.7 DDR333,打开ATA100 测试64M是57 MB/sec
不知道X70(ATA133)是多少?

jam 发表于 2003-4-28 00:01:05

厉害

Dragonfly 发表于 2003-4-28 00:05:21

yes, my 15k rpm scsi disk can also get this number. but that is too expensive for home desktop use.

cnhnln 发表于 2003-4-28 16:45:33

我的酷鱼7200.7 DDR333,打开ATA100 测试64M是57 MB/sec
不知道X70(ATA133)是多少?

这么快!我的酷鱼4只有40多一点。看来西捷要翻身了:mrgreen:

7299 发表于 2003-4-28 19:10:03

主要是7200.7 单堞80G的,而且内部传输率标称是58M/sec,说明linux的磁盘性能还是比windows好的,windows无论如何都达不到这个“理论速度”。

Dragonfly 发表于 2003-4-28 21:48:24

since windoze is not an open source one, so can not compare the software overhead between them.

红星照耀中国 发表于 2003-5-1 01:56:11

unbelievable mine

Timing buffer-cache reads:   128 MB in0.40 seconds =319.71 MB/sec
Timing buffered disk reads:64 MB in1.45 seconds = 44.16 MB/sec

Bluedata 发表于 2003-5-1 01:58:16

大家的都差不多,所以就是正常的了。 :mrgreen:
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