As far as I know, AC31600H does not support UDMA at all.
Only regular multi-word DMA mode 0/1/2...
Are there any problems with mword DMA mode 2 the reason of blacklisting
this disk ?
> Until a better test can be composed that tests against model and firmware,
> safety first is the rules of the game.
>
> If your drive functions okay, then edit the ./drivers/block/ide-dma.c
> file.
>
> On Thu, 21 Jan 1999, David Whysong wrote:
>
> > On Thu, 21 Jan 1999, Koby Kahane wrote:
> >
> > >I have recently upgraded from 2.0.36 to 2.2.0-pre9
> > >
> > >I've noticed that my boot messages say that DMA is disabled for my
> > >2nd and 3rd hard disks. Is it safe for me to enable DMA (via hdparm)
> > >for these drive models or should I stick to none-DMA mode?
> >
> > I don't know about the AC33100H, but my AC31600H has worked perfectly with
> > DMA for about 3 years. I don't know why it has been blacklisted...
> >
> > Model=WDC AC31600H, FwRev=23.16U73, SerialNo=WD-WT289
> > Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
> > RawCHS=3148/16/63, TrkSize=57600, SectSize=600, ECCbytes=22
> > BuffType=3(DualPortCache), BuffSize=128kB, MaxMultSect=16, MultSect=16
> > DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=0(slow)
> > (maybe): CurCHS=787/64/63, CurSects=3173184, LBA=yes, LBAsects=3173184
> > tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2
> > IORDY=on/off, tPIO={min:160,w/IORDY:120}, PIO modes: mode3 mode4
Andrzej
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