From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: PATA on a SATA system doing PIO not DMA Date: Tue, 15 Aug 2006 07:10:37 -0400 Message-ID: <44E1ABAD.7070900@garzik.org> References: <200608151354.21359.ide@coker.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:40892 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S932675AbWHOLKn (ORCPT ); Tue, 15 Aug 2006 07:10:43 -0400 In-Reply-To: <200608151354.21359.ide@coker.com.au> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Russell Coker Cc: linux-ide@vger.kernel.org Russell Coker wrote: > I have a Pentium-D machine with ICH7 chipset running the 64bit version of FC5 > that has one S-ATA disk and one P-ATA disk. The S-ATA disk runs normally > giving good performance while the P-ATA disk does about 1.5MB/s (PIO). > > I have the drivers loaded in the initrd (can even have the root filesystem on > the P-ATA disk). The P-ATA disk in question ran at full speed on RHEL4 in a > 32bit Celeron machine and has run at full speed in a Pentium 4 machine > running FC5. > > Any ideas or suggestions for tests I should perform? Below is the relevant > section of dmesg output: I bet you need to build the IDE driver into the kernel. Jeff