/dev/hdX it your device that wish to enable dma on.
do a hdparm -i /dev/hdX to be sure that you can enable dma.
e.g.:
angus root # hdparm -i /dev/hda
/dev/hda:
Model=QUANTUM BIGFOOT TS12.7A, FwRev=A21.0G00, SerialNo=381906129356
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4
BuffType=DualPortCache, BuffSize=418kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=25075008
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
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-4 T13 1153D revision 15: 1 2 3 4
* signifies the current active mode
is my drive.
DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
shows me that the dive supports dma.
UDMA modes: udma0 udma1 *udma2
Shows me that it actually supports UDMA and is using udma2 mode.
hdparm -d 1 /dev/hdX
enables DMA)
hdparm -d1 -A1 -m16 -u1 -a64 /dev/hdX
enables DMA and other safe performance-enhancing options)
hdparm -X66 /dev/hdX
force-enables Ultra-DMA -- dangerous -- may cause some drives to mess
up)
Rob
Pupeno wrote:
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> When I start my computer I always get this message:
> ******************************************************
> * Warning: The dma on your hard drive is turned off. *
> * This may really slow down the fsck process. *
> ******************************************************
> How do I enable DMA ?
> Thanks.
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> http://www.kde.org
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