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debian里面开启dma功能,提高硬盘读写速度 |
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1.安装hdparm QUOTE: debian:~#aptitude install hdparm 手动起动DMA:QUOTE: debian:~#hdparm -d1 /dev/hda 2.配制系统起动时自动打开磁盘DMA
A.在 /etc/init.d/ 目录下新建文件dma-start.sh 内容如下:QUOTE: #!/bin/sh
#This script start ATA100 DMA
hdparm -d1 /dev/hda B.在/etc/rc2.d/下建一个连接到刚才建的文件QUOTE: debian:~#ln -s /etc/init.d/dma-start.sh /etc/rc2.d/S95dma-start.sh 3.对比QUOTE: debian:~# hdparm -d0 /dev/hda /dev/hda:
setting using_dma to 0 (off)
using_dma = 0 (off)QUOTE: debian:~# hdparm -t /dev/hda /dev/hda: Timing buffered
disk reads: 12 MB in 3.33 seconds = 3.61 MB/secQUOTE: debian:~# hdparm -d1 /dev/hda /dev/hda:
setting using_dma to 1 (on)
using_dma = 1 (on)QUOTE: debian:~#hdparm -t /dev/hda /dev/hda: Timing buffered
disk reads: 156 MB in 3.01 seconds = 51.89 MB/sec
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