From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell Coker Subject: PATA on a SATA system doing PIO not DMA Date: Tue, 15 Aug 2006 13:54:20 +1000 Message-ID: <200608151354.21359.ide@coker.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from smtp.sws.net.au ([61.95.69.6]:32455 "EHLO smtp.sws.net.au") by vger.kernel.org with ESMTP id S1752096AbWHODyY (ORCPT ); Mon, 14 Aug 2006 23:54:24 -0400 Received: from localhost (localhost [127.0.0.1]) by smtp.sws.net.au (Postfix) with ESMTP id C91C161B0C for ; Tue, 15 Aug 2006 13:54:22 +1000 (EST) Received: from smtp.sws.net.au ([127.0.0.1]) by localhost (smtp [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 31807-10 for ; Tue, 15 Aug 2006 13:54:22 +1000 (EST) Received: from aeon.coker.com.au (localhost [127.0.0.1]) by smtp.sws.net.au (Postfix) with ESMTP id 81A8361AFA for ; Tue, 15 Aug 2006 13:54:22 +1000 (EST) Received: from aeon (aeon [127.0.0.1]) by aeon.coker.com.au (Postfix) with ESMTP id 8DFC3A86E9 for ; Tue, 15 Aug 2006 13:54:21 +1000 (EST) Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org 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: Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx ide0: I/O resource 0x1F0-0x1F7 not free. ide0: ports already in use, skipping probe Probing IDE interface ide1... hdc: WDC WD3000JB-00KFA0, ATA DISK drive hdd: BENQ DVD DD DW1640, ATAPI CD/DVD-ROM drive ide1 at 0x170-0x177,0x376 on irq 15 hdc: max request size: 512KiB hdc: 586072368 sectors (300069 MB) w/8192KiB Cache, CHS=36481/255/63 hdc: cache flushes supported hdc: hdc1 hdc2 hdc3 hdd: ATAPI 48X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache Uniform CD-ROM driver Revision: 3.20 ide-floppy driver 0.99.newide