笔记本硬盘如何打开DMA

wchinpla

我的本本是Asus A3517Vc,
配的是4200转的日立硬盘，
hdparm -tT /dev/hda

/dev/hda:
Timing cached reads:   1388 MB in  2.00 seconds = 693.76 MB/sec
Timing buffered disk reads:   12 MB in  3.47 seconds =   3.46 MB/sec

当我用unrar解压文件的时候，电脑基本上不能动了。。。
用ftp下载文件，速度超过500多k的时候电脑速度也变得很慢啊。。。

这到底是不是DMA的问题啊?

lanb

blan:/home/lanb# hdparm /dev/hda

/dev/hda:
multcount    =  0 (off)
IO_support   =  0 (default 16-bit)
unmaskirq    =  0 (off)
using_dma    =  1 (on)
keepsettings =  0 (off)
readonly     =  0 (off)
readahead    = 256 (on)
geometry     = 65535/16/63, sectors = 78140160, start = 0

blan:/home/lanb# hdparm -d 1 -K 1 -k 1 /dev/hda

/dev/hda:
setting using_dma to 1 (on)
setting keep_settings to 1 (on)
setting drive keep features to 1 (on)
using_dma    =  1 (on)
keepsettings =  1 (on)

d00m3d

最好把 -a1024 也加上