> computer: Chipset 430FX / Triton / PIIX, disk Western Digital Caviar AC21600H
>Firmware code F6 (no UDMA, some WD docs show DMA mw2, some PIO4...), kernel 2.2.17
>with ide patch and PIIX enabled, DMA by default, generic DMA, and couple others. Did
>not try 'bad DMA-firmware (EXPERIMENTAL)'. dmesg (relevant - in my view - lines):
> BIOS DOES identify the hard disk and the CD-ROM correctly, although it is pretty old
>and no newer version is available.
Running a basically similar system here, DataExpert 8551, with a modified Award (was
originally an ami) bios from http://exp8551.mypage.org.
Chipset is a 430FX, Same hard drive as what you have. Pentium 133, 48 meg ram.
Kernel 2.2.17 with raid patch, and ide patch. Shares the ide cable with a WDC 850 meg
drive as slave.
monitor:~# hdparm -d1 /dev/hda
/dev/hda:
setting using_dma to 1 (on)
using_dma = 1 (on)
> hdparm -d1 returns:
> /dev/hda:
> setting using_dma to 1 (on)
> HDIO_SET_DMA failed: Operation not permitted
> using_dma = 0 (off)
>
/dev/hda:
Model=WDC AC21600H, FwRev=24.09P07, SerialNo=WD-WM3362938634
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=3148/16/63, TrkSize=57600, SectSize=600, ECCbytes=22
BuffType=DualPortCache, BuffSize=128kB, MaxMultSect=16, MultSect=off
CurCHS=3148/16/63, CurSects=3173184, LBA=yes, LBAsects=3173184
IORDY=on/off, tPIO={min:160,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 *mdma2
so my firmware is actually one version older than yours, and allows me to set DMA.
And has the associated speed increase/lower cpu
> Model=DW CCA1206H0 , FwRev=420.P980,
> SerialNo=DWW-3M63
What brand is your motherboard?
Mike Dresser
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