Re: IDE bug in 2.4.2-ac12?

From: konrad_lkml@gmx.de
Date: Thu Mar 08 2001 - 03:01:15 EST

Vojtech Pavlik wrote:
> On Tue, Mar 06, 2001 at 09:32:46PM +0000, Paul Bristow wrote:
> > On Tuesday 06 March 2001 19:13, Konrad Stopsack wrote:
> > > Hello guys,
> > >
> > > I hope you've read my posting "DMA problem with ZIP drive and VIA
> > > VT82C598MVP / VT82C586B chip" (why does anybody answer?).
> > > I now tried the 2.4.2-ac12 kernel including the latest VIA 82c586b
> driver
> > > (version 3.21), but the effects were almost the same:
> > > - just when the kernel tried to access to the hard disk during boot,
> DMA
> > > errors were occured
> > > - "hdparm /dev/hda" displayed 9 MB per second (and not 11 MB like
> without
> > > ZIP) - /proc/ide/via reported 16 MB transfer rate (and not 33MB like
> > > without ZIP drive)
> > > - Kernel 2.4.2-ac12 reports a "ide-floppy: hdd: I/O error, pc = 5a,
> key =
> > > 5, asc = 24, ascq = 0" error, 2.4.2 doesn't
> > >
> > > My IDE configuration is:
> > > /dev/hda: Hard disk => Primary IDE controller
> > > /dev/hdc CD-ROM => Secondary IDE controller
> > > /dev/hdd: ZIP => Secondary IDE controller
> > >
> > > Could you please tell me whether it's a bug or a feature?
> >
> > OK. The ZIP drive can not handle uDMA, so it's normal for the
secondary
>
> > controller to drop back. In my opinion, the primary controller should
> stay
> > at uDMA speed, but it is PC hardware so it is perfectly possible there
> is
> > something cheap that locks them together. I will bring up ac-12 and
> check
> > the error message...
>
> Actually I'm beginning to suspect the PSU here ... does removing the
> CD-ROM (leaving just the HDD and the ZIP in) help? Does the ZIP cause
> errors even when connected just to the power cable (and not the IDE
> cable)?
>
Do you mean the Power Supply Unit? Or the Program Storage Unit? ;-)

To answer to your questions:
 - I haven't tried to remove the CD-ROM because both devices shall work
together
 - the ZIP doesn't cause problems when just the power cable is connected

Although my PC has only got an old Baby AT 200W power supply I don't think
that's the point.

cu Konrad 

-- 
Konrad Stopsack - konrad@xxxxxxx.xxx

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This archive was generated by hypermail 2b29 : Thu Mar 15 2001 - 21:00:07 EST