读硬盘的时候,系统变的很慢?

lile

装了REDHAT AS4后,一读盘就,鼠标就一卡一卡的,无论程序有多小.
哪位知道是啥原因呀?

笔记本:
cpu amd
ati显卡,没装驱动.
硬盘40G,4200转.
在xp下很好.

d00m3d

建议：

1. 增加内存
2. 启用 swap
3. 用 hdparm 优化一下你的硬盘设置

lile

应该是硬盘问题，DMA打不开。有没有其它办法呀。

d00m3d

DMA 打不开有可能是内核编译时设置不当，不一定是硬盘问题

lile

这里是一些系统信息,帮忙看看:
[root@HP sbin]# ./hdparm /dev/hda

/dev/hda:
multcount    = 16 (on)
IO_support   =  0 (default 16-bit)
unmaskirq    =  0 (off)
using_dma    =  0 (off)
keepsettings =  0 (off)
readonly     =  0 (off)
readahead    = 256 (on)
geometry     = 65535/16/63, sectors = 40007761920, start = 0

[root@HP sbin]# ./hdparm -i /dev/hda

/dev/hda:

Model=TOSHIBA MK4025GAS, FwRev=KA101A, SerialNo=95MM3021S
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=48
BuffType=unknown, BuffSize=0kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=78140160
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes:  pio0 pio1 pio2 pio3 pio4
DMA modes:  sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
AdvancedPM=yes: unknown setting WriteCache=enabled
Drive conforms to: device does not report version:

* signifies the current active mode

[root@HP sbin]# ./lspci
00:00.0 Host bridge: ATI Technologies Inc RS480 Host Bridge (rev 01)
00:01.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge
00:13.0 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller
00:13.1 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller
00:13.2 USB Controller: ATI Technologies Inc IXP SB400 USB2 Host Controller
00:14.0 SMBus: ATI Technologies Inc IXP SB400 SMBus Controller (rev 11)
00:14.1 IDE interface: ATI Technologies Inc Standard Dual Channel PCI IDE Controller ATI
00:14.3 ISA bridge: ATI Technologies Inc IXP SB400 PCI-ISA Bridge
00:14.4 PCI bridge: ATI Technologies Inc IXP SB400 PCI-PCI Bridge
00:14.5 Multimedia audio controller: ATI Technologies Inc IXP SB400 AC'97 Audio Controller (rev 02)
00:14.6 Modem: ATI Technologies Inc ATI SB400 - AC'97 Modem Controller (rev 02)
01:05.0 VGA compatible controller: ATI Technologies Inc ATI Radeon XPRESS 200M 5955 (PCIE)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
05:09.0 CardBus bridge: Texas Instruments PCIxx21/x515 Cardbus Controller
05:09.2 FireWire (IEEE 1394): Texas Instruments OHCI Compliant IEEE 1394 Host Controller
05:09.3 Mass storage controller: Texas Instruments PCIxx21 Integrated FlashMedia Controller
05:09.4 Class 0805: Texas Instruments PCI6411, PCI6421, PCI6611, PCI6621, PCI7411, PCI7421, PCI7611, PCI7621 Secure Digital (SD) Controller
[root@HP sbin]#
[root@HP sbin]# uname -a
Linux HP 2.6.9-34.EL #1 Fri Feb 24 16:44:51 EST 2006 i686 athlon i386 GNU/Linux
[root@HP sbin]# ./hdparm -d1 /dev/hda

/dev/hda:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma    =  0 (off)

Mandriva

# setenforce 0
# hdparm -c1 -d1 -m16
# setenforce 1

lile

我升级了内核,现在好了

lile

2.6.15可以的。