To: linux-kernel@vger.kernel.org
Subject: why no option for 'ide=nocddma'?
Message-Id: <20060324184338.7A87511003E@bromo.msbb.uc.edu>
Date: Fri, 24 Mar 2006 13:43:38 -0500 (EST)
From: howarth@bromo.msbb.uc.edu (Jack Howarth)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 885
Lines: 18

   It appears that the current Linux kernel still has trouble
verifying installation CDs for Fedora Core even in the FC5
release unless users pass the 'ide=nodma' kernel option. If
the problem with CDs using dma isn't going to be fully resolved,
why can't we have a 'ide=nocddma' kernel option that would only
apply to CD/DVD drives? The current situation is unfortunate
because installations end up with 'ide=nodma' in grub.conf
which severely slows down disk i/o. Thanks in advance for
any information on this issue.
                  Jack
ps Does this issue with dma and CD/DVD drives only apply to reads
or are writes effected as well?

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