Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161832AbWKIUb6 (ORCPT ); Thu, 9 Nov 2006 15:31:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965737AbWKIUb6 (ORCPT ); Thu, 9 Nov 2006 15:31:58 -0500 Received: from smtpauth02.prod.mesa1.secureserver.net ([64.202.165.182]:59885 "HELO smtpauth02.prod.mesa1.secureserver.net") by vger.kernel.org with SMTP id S965546AbWKIUb5 (ORCPT ); Thu, 9 Nov 2006 15:31:57 -0500 Message-ID: <4553903B.4010908@seclark.us> Date: Thu, 09 Nov 2006 15:31:55 -0500 From: Stephen Clark Reply-To: Stephen.Clark@seclark.us User-Agent: Mozilla/5.0 (X11; U; Linux 2.2.16-22smp i686; en-US; m18) Gecko/20010110 Netscape6/6.5 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Luca Tettamanti CC: linux-kernel@vger.kernel.org Subject: Re: Abysmal PATA IDE performance References: <20061109202319.GA13940@dreamland.darkstar.lan> In-Reply-To: <20061109202319.GA13940@dreamland.darkstar.lan> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2183 Lines: 66 Luca Tettamanti wrote: >Stephen Clark ha scritto: > > >>Looking at the dmesg output I am a little confused, see comments below: >>partial dmesg output follows: >> >>SCSI subsystem initialized >>libata version 2.00 loaded. >>ata_piix 0000:00:1f.2: version 2.00 >>ata_piix 0000:00:1f.2: MAP [ P0 P2 IDE IDE ] >>ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 19 (level, low) -> IRQ 233 >>PCI: Setting latency timer of device 0000:00:1f.2 to 64 >>ata1: SATA max UDMA/133 cmd 0x1F0 ctl 0x3F6 bmdma 0xFFA0 irq 14 >>scsi0 : ata_piix >>Synaptics Touchpad, model: 1, fw: 6.1, id: 0xa3a0b3, caps: 0xa04713/0x10008 >>input: SynPS/2 Synaptics TouchPad as /class/input/input1 >>ATA: abnormal status 0x7F on port 0x1F7 >>ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xFFA8 irq 15 >>scsi1 : ata_piix >>ata2.00: ATA-6, max UDMA/100, 117210240 sectors: LBA48 >>ata2.00: ata2: dev 0 multi count 16 >>usb 2-2: new low speed USB device using uhci_hcd and address 3 >>ata2.01: ATAPI, max UDMA/33 >>ata2.00: configured for UDMA/33 <==== why isn't this 66 or 100 ? >>===============**** >> >> > >This is your optical (CD/DVD) unit; I doubt that you can saturate that >link, even if your drive can do a sustained 16x transfer with a DVD it >will use only 21MBps. Your HD is using UDMA/100. > >Forcing the interface to a higher speed may lead to CRC errors when >using the drive. > >Luca > > Hi Luca, aren't the ata2.00: messages referring to my hard drive and the ata2.01 messages referring to my optical drive? ata2.00: ATA-6, max UDMA/100, 117210240 sectors: LBA48 ata2.00: ata2: dev 0 multi count 16 ata2.01: ATAPI, max UDMA/33 ata2.00: configured for UDMA/33 <==== why isn't this 66 or 100 ? -- "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) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/