[调查]硬盘速度（有测试方法）

baileyking

/dev/hda
IO_support = 1 (32-bit)
using_dam = 1 (on)
Timing cached reads: 1312MB in 2.00 secondes = 655.12MB/sec
Timing buffered disk reads: 104MB in 3.01 seconds = 34.53 MB/sec

baileyking

(我的是IDE硬盘)
测试之前请大开32bit传输方式:
#hdparm -c 1 /dev/hda
在硬盘上使用DMA
#hdparm -d 1 /dev/hda
测试
#hdparm -tT /dev/hda

kanhu

/dev/hda:
IO_support   =  0 (default 16-bit)
using_dma    =  0 (off)
Timing buffer-cache reads:   4208 MB in  2.00 seconds = 2104.00 MB/sec
Timing buffered disk reads:   12 MB in  3.52 seconds =   3.41 MB/sec

我是sata盘，在bios里面设置成combined模式的。

有颜色的猫

IDE 的盘

1. 
   
2. [root@room ~]# hdparm -Tt /dev/hda
   
3. 
   
4. /dev/hda:
   
5. Timing cached reads:   2796 MB in  2.00 seconds = 1398.39 MB/sec
   
6. Timing buffered disk reads:  160 MB in  3.00 seconds =  53.31 MB/sec
   
7. [root@room ~]# hdparm -Tt /dev/hdb
   
8. 
   
9. /dev/hdb:
   
10. Timing cached reads:   2816 MB in  2.00 seconds = 1406.62 MB/sec
    
11. Timing buffered disk reads:  184 MB in  3.01 seconds =  61.09 MB/sec
    
12. [root@room ~]#
    

复制代码

jlfzx

hdparm -tT /dev/sda

/dev/sda:
Timing buffer-cache reads:   128 MB in  0.22 seconds =581.82 MB/sec
Timing buffered disk reads:  64 MB in  3.39 seconds = 18.88 MB/sec

也是sata硬盘，为什么这么慢呢？

me09

xxxxx:/# hdparm -cdtT /dev/sda

/dev/sda:
Timing cached reads:   1768 MB in  2.00 seconds = 884.25 MB/sec
Timing buffered disk reads:  164 MB in  3.01 seconds =  54.50 MB/sec

scis raid-1

brokencluster

fileserver:~# cat /proc/ide/hda/model
ST3802110A
fileserver:~# hdparm -cdtT /dev/hda

/dev/hda:
IO_support   =  0 (default 16-bit)
using_dma    =  1 (on)
Timing cached reads:   2368 MB in  2.00 seconds = 1183.93 MB/sec
Timing buffered disk reads:  202 MB in  3.00 seconds =  67.24 MB/sec
fileserver:~# hdparm -cdtT /dev/hdg
hcnetvod:~# hdparm -tT /dev/hdc

/dev/hdc:
Timing cached reads:   2508 MB in  2.00 seconds = 1253.92 MB/sec
Timing buffered disk reads:  190 MB in  3.00 seconds =  63.25 MB/sec
fileserver:~# hdparm -tT /dev/hdc


/dev/hdg:
IO_support   =  0 (default 16-bit)
using_dma    =  1 (on)
Timing cached reads:   2624 MB in  2.00 seconds = 1311.92 MB/sec
Timing buffered disk reads:  192 MB in  3.01 seconds =  63.74 MB/sec
fileserver:~# hdparm -cdtT /dev/hdh

/dev/hdh:
IO_support   =  0 (default 16-bit)
using_dma    =  1 (on)
Timing cached reads:   2212 MB in  2.00 seconds = 1105.93 MB/sec
Timing buffered disk reads:  192 MB in  3.02 seconds =  63.57 MB/sec
fileserver:~# hdparm -cdtT /dev/hdi

/dev/hdi:
IO_support   =  0 (default 16-bit)
using_dma    =  1 (on)
Timing cached reads:   2400 MB in  2.00 seconds = 1199.93 MB/sec
Timing buffered disk reads:  204 MB in  3.00 seconds =  68.00 MB/sec
fileserver:~# hdparm -cdtT /dev/hdj

/dev/hdj:
IO_support   =  0 (default 16-bit)
using_dma    =  1 (on)
Timing cached reads:   2468 MB in  2.00 seconds = 1233.92 MB/sec
Timing buffered disk reads:  198 MB in  3.02 seconds =  65.56 MB/sec

penglj

我的读的速度是450M/s

小小磊

/dev/hda:
IO_support   =  0 (default 16-bit)
using_dma    =  1 (on)
Timing cached reads:   2644 MB in  2.00 seconds = 1321.54 MB/sec
Timing buffered disk reads:  168 MB in  3.00 seconds =  55.93 MB/sec

badseed

DELL 2950 两块SAS硬盘  RAID 1
hdparm -tT /dev/sdb
/dev/sdb:
Timing cached reads:   10744 MB in  2.00 seconds = 5378.19 MB/sec
Timing buffered disk reads:  270 MB in  3.01 seconds =  89.74 MB/sec


DELL2950 外接220S磁盘柜 11块硬盘做RAID5
hdparm -tT /dev/sda
/dev/sda:
Timing cached reads:   10476 MB in  2.00 seconds = 5244.04 MB/sec
Timing buffered disk reads:  384 MB in  3.01 seconds = 127.55 MB/sec