Re: Identifying/activating faster ATAxx modes (WAS kernel config tale of woe)

[Tomas Szepe]

> > > /dev/hda:
> > > 
> > >  Model=Maxtor 6E030L0, FwRev=NAR61590, SerialNo=E106SZLE
> > >  Config={ Fixed }
> > >  RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
> > >  BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=16
> > >  CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=60058656
> > >  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
> >...
> > This is weird.  Your disk seems to be set up for udma6 (UATA133),
> > which should provide for transfer rates of at least 40MiB/s.
> >...
> 
> The information in "hdparm -i" shows the identification info of the
> drive. It doesn't show whether DMA is actually used (you need
> "hdparm -v" for this)...

While this is true, I fail to see why the -i output would report
udma6 as being the current transfer mode instead of a pio one if
DMA were disabled.

-- 
Tomas Szepe <[e-mail]>