linux-kernel - Re: 2.6.20*: PATA DMA timeout, hangs (2)

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Date:	Mon, 12 Mar 2007 14:25:46 +0100
From:	Frank van Maarseveen <frankvm@...nkvm.com>
To:	Alistair John Strachan <s0348365@....ed.ac.uk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.20*: PATA DMA timeout, hangs (2)

On Mon, Mar 12, 2007 at 12:07:18PM +0000, Alistair John Strachan wrote:
> On Monday 12 March 2007 11:24, Frank van Maarseveen wrote:
> > On Mon, Mar 12, 2007 at 09:54:47AM +0100, Frank van Maarseveen wrote:
> > > 2.6.19 is ok, 2.6.20.[12] hangs from the moment DMA is turned on (hdparm
> > > -d 1 /dev/hda):
> > >
> > > 	hda: dma_timer_expiry: dma status == 0x20
> > > 	hda: DMA timeout retry
> > > 	hda: timeout waiting for DMA
> > > 	hda: status error: status=0x58 {
> > > 	DriveReady
> > > 	SeekComplete
> > > 	DataRequest
> > > 	}
> [snip]
> > This system has SATA but there's only one PATA disk
> 
> Not a solution, unfortunately, but try disabling CONFIG_IDE and using Alan's 
> new PATA drivers. For your Intel systems, this should mean you need only:
> 
> CONFIG_ATA_PIIX
> 
> For both SATA and PATA support. You'll need the appropriate SCSI modules built 
> in (if you say =y), i.e. SCSI disk and SCSI CDROM should be built in.

yes, that worked... after booting with root=/dev/sda2 and s/hda/sda/
/etc/fstab /etc/lilo.conf + lilo. didn't mount a /dev/sr0 for a loong
time.

So, are /dev/hd* going to disappear in a few years? iow, does it make
sense to _slowly_ start to migrate to /dev/sd*?

The problem is there's no plan B in case of any troubles except rename
everything back again to boot an old kernel.

-- 
Frank
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