From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Clark Subject: Kernel 2.6.37 erroneously limiting to UDMA/33 Date: Wed, 05 Jan 2011 15:39:30 -0500 Message-ID: <4D24D702.9090908@earthlink.net> Reply-To: sclark46@earthlink.net Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from elasmtp-dupuy.atl.sa.earthlink.net ([209.86.89.62]:55087 "EHLO elasmtp-dupuy.atl.sa.earthlink.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752894Ab1AEUjc (ORCPT ); Wed, 5 Jan 2011 15:39:32 -0500 Received: from [69.22.83.66] (helo=joker.seclark.com) by elasmtp-dupuy.atl.sa.earthlink.net with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.67) (envelope-from ) id 1Paa8q-00071r-5d for linux-ide@vger.kernel.org; Wed, 05 Jan 2011 15:39:32 -0500 Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Hello, Why is the kernel limiting me to udma/33 when the device says it can do ata2.01: CFA: TRANSCEND, 20070831, max UDMA/66 There is no cable the compact flash is a socket on the motherboard! Loading sd_mod.ko module Loading libata.ko module Loading ata_generic.ko module Loading pata_acpi.ko module pata_acpi 0000:00:0f.0: PCI INT B -> GSI 21 (level, low) -> IRQ 21 pata_acpi 0000:00:0f.0: PCI INT B disabled Loading pata_via.ko module scsi0 : pata_via scsi1 : pata_via ata1: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xfa00 irq 14 ata2: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xfa08 irq 15 ata2.01: CFA: TRANSCEND, 20070831, max UDMA/66 ata2.01: 7962192 sectors, multi 0: LBA ata2.01: limited to UDMA/33 due to 40-wire cable ata2.01: configured for UDMA/33 scsi 1:0:1:0: Direct-Access ATA TRANSCEND 2007 PQ: 0 ANSI: 5 sd 1:0:1:0: [sda] 7962192 512-byte logical blocks: (4.07 GB/3.79 GiB) sd 1:0:1:0: [sda] Write Protect is off sd 1:0:1:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DA sda: sda1 sda2 sda3 sd 1:0:1:0: [sda] Attached SCSI disk Loading ata_piix.ko module Thanks, Steve -- "They that give up essential liberty to obtain temporary safety, deserve neither liberty nor safety." (Ben Franklin) "The course of history shows that as a government grows, liberty decreases." (Thomas Jefferson)