请教高手，如何打开硬盘的UDMA100？？？？？
我的硬盘是MAXTOR6L020J1,主板是815EP B-step，这两个都支持UDMA100的传输模式，但是我不知道怎么打开，希望哪位高手帮帮我。我的系统是Mandrakelinux10.0Official
有关硬盘信息如下：
# hdparm -v /dev/hda
/dev/hda:
multcount = 16 (on)
IO_support =0 (default 16-bit)
unmaskirq =0 (off)
using_dma =1 (on)
keepsettings =0 (off)
readonly =0 (off)
readahead = 256 (on)
geometry = 39813/16/63, sectors = 40132503, start = 0
# hdparm -i /dev/hda
/dev/hda:
Model=MAXTOR 6L020J1, FwRev=A93.0500, SerialNo=661129941023
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4
BuffType=DualPortCache, BuffSize=1819kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=40132503
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes:pio0 pio1 pio2 pio3 pio4
DMA modes:mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 udma6
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-5 T13 1321D revision 1:
* signifies the current active mode using_dma = 1 (on)
已经打开了。 哦，原来已经打开了 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 udma6
而且是在ATA－100上
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