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Date: Tue, 04 Mar 2003 17:55:51 -0500
From: Mathias Kretschmer <mathias@lemur.sytes.net>
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: IDE DVD reading & error handling
References: <3E64EE6A.90208@lemur.sytes.net> <1046818748.12226.21.camel@irongate.swansea.linux.org.uk>
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> I think its perfectly doable to set the maximum retries per
> device. Have a look at the current ide_error() and the error: handler
> in the relevant ide drivers (notably ide-cd).
> 
> 
>>I wonder if it would be possible to tune the IDE layer by i.e.
>>reducing the number of retries and disabling the controller reset, etc.
> 
> 
> A lot of the time you have to go through the controller reset. However 
> cutting the retries down and having good readahead management on the
> I/O thread ought to still cope with that.

that's what I'm hoping for :)

Would it also be possible/make sense to never switch from DMA to PIO 
mode since those DVD read errors are most likely not a DMA problem ?


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