debian里面开启dma功能,提高硬盘读写速度 （只对IDE硬盘有效）
kevin.Zhu 发布于：2013-1-16 0:55 分类：Debian 有 12 人浏览，获得评论 0 条
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/sec
QUOTE:
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
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/sec
QUOTE:
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