Re: kernel 2.6.1 and cdrecord on ATAPI bus

[Jens Axboe]

On Sat, Jan 17 2004, Andreas Schwab wrote:
> Charles Shannon Hendrix <shannon@xxxxxxxxxxxxx> writes:
> 
> > Sat, 17 Jan 2004 @ 05:22 +0100, Matthias Andree said:
> >
> >> Interesting. I use dev=/dev/hdc and it works fine for me (Plextor 48X),
> >> but then again, I'm also running the latest cdrecord alpha.
> >
> > % cdrecord -version
> > Cdrecord 2.00.3 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jörg Schilling
> >
> > I can try an alpha version, but from running strace on cdrecord, it
> > seems like Linux is the problem.  Several ioctl() calls are failing just
> > before cdrecord prints an error message and exits.
> 
> I see similar problems on ppc, with these messages in the log:
> 
> Jan 17 16:15:43 whitebox kernel: ide0, timeout waiting for dbdma command stop
> Jan 17 16:15:43 whitebox kernel: ide-cd: dma error
> Jan 17 16:15:43 whitebox kernel: hdb: DMA disabled
> Jan 17 16:15:43 whitebox kernel: hdb: dma error: status=0x50 { DriveReady SeekComplete }
> Jan 17 16:15:43 whitebox kernel: hdb: dma error: error=0x00
> Jan 17 16:15:43 whitebox kernel: cdrom_newpc_intr: 180 residual after xfer

ppc pmac ide has known problems withe residual data counts for dma
transfers. basically it's a limitation in the ide dma api.

-- 
Jens Axboe

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