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

From: Tomas Szepe (szepe@pinerecords.com)
Date: Tue Nov 26 2002 - 07:15:45 EST

> > > /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 <szepe@pinerecords.com>
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