Steve Wilson wrote:
>
> On Wed, 02 Jun 1999, you wrote:
> > On Wed, 2 Jun 1999, Konstantin Boldyshev wrote:
> >
> > > I have two IDE hard drives - hda(WD 13GB) and hdb(WD 2GB), and also a CD as
> > > hdd.
> >
> > Are you using an extremely broken IDE controller or something? The
> > messages would seem to indicate the disk (or controller) can't handle
> > being turned to 32-bit IO mode with DMA transfers.
> >
>
> Uhm - a bit cavalier! My system CAN'T handle PIO mode 4 fer instance
> but can deal with 32 bit DMA. The drive can, and the cable is okay - both
> imported from a UDMA 33 capable system. My particular mother board doesn't
> seem to support UDMA 33 though.
>
> So even MODERN systems -only a few months old still may not be
> able to handle full 32bit DMA or UDMA33. Both are dangerous
> assumptions, and maybe should be left to someone trying to tweak
> their system.
You're overjumping the gun a bit on the defense. The flags that
Bernhard's referring to DO NOT refer to UDMA33 nor 32bit DMA. The
32-bit IO mode flag has nothing to do with DMA, only with the internal
32-bit path to the drive controller. The flag has been in hdparm for at
least 3 years, and does result in a bit more performance out of standard
drives/controllers.
--
Steve Philp
[EMAIL PROTECTED]
