linux-kernel - How to Switch DMA off for only one Harddisk at Kernelboot

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Message-ID: <4765690C.6010605@j-o-a.de>
Date:	Sun, 16 Dec 2007 19:06:04 +0100
From:	Oliver Joa <oliver@...-a.de>
To:	linux-kernel@...r.kernel.org
Subject: How to Switch DMA off for only one Harddisk at Kernelboot

Hi,

how can I tell the kernel not to probe DMA for a specific harddisk (e.g. 
hda). My first Drive (hda) is a Compact-Flash Card which can not do DMA. 
The kernel tries at boot to switch to DMA but fails. If I use ide=nodma, 
the kernel boots about 2 minutes faster, but then I can not switch on 
DMA for the second Drive (hdc) which is a normal Harddisk. Do I have to 
live with this 2 minutes waiting time or is there another solution? I 
did not find any kernel-parameter for this purpose.

Sorry if I ask here, but I can not find any solution, and I asked 
already in other groups.

Thank you very much

Olli
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