Subject: Re: Soft Errors / DMA errors on IBM 18G ATAPI disk
To: jiho <>
From: Manuel Bouyer <>
List: port-i386
Date: 10/20/1999 11:04:34
On Tue, Oct 19, 1999 at 12:34:10PM +0000, jiho wrote:
> Hmm, no, it doesn't sound very plausible, if it's per-command.
> If it was "global", I'd be more suspicious that some drives might think they 
> don't need to be asked, in violation of the (draft?  You mean it isn't even a) 
> standard (yet?).

It is but the final ducument is not available freely. And disks ususally gets
on the market way before the final document is done so I believe
intermediate drafts are good aproximation :)

> > I'm pretty sure now that there is a problem with interrupts in the IDE driver
> > (or maybe a more general problem which only affects the IDE driver).
> > It seems that sometimes the IDE driver gets an IRQ even when we're still at
> > splbio() ...
> Now that's _really_ interesting.
> If it's a general problem, I'm not so sure it only affects the IDE driver.
> I was already wondering if there isn't something screwy going on with the PS/2 
> mouse driver and its interrupts.  It seems especially prone to trouble while 
> I'm downloading data via my dial-up ISP, through my internal modem's serial 
> port -- in other words, when the serial port driver and the PS/2 mouse driver 
> are both getting interrupts.  The net result seems to be bogus mouse events, 
> which can cause various problems for clients who don't/can't filter them out 
> properly.  I don't know if/how it affects/involves the serial port driver.

Hum, I didn't notice this on my hardware. What hardware do you have ?
Especially what motherboard ?

Manuel Bouyer, LIP6, Universite Paris VI.