From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: SATA Performance Date: Fri, 08 Oct 2004 10:48:30 -0400 Sender: linux-raid-owner@vger.kernel.org Message-ID: <4166A8BE.4060902@pobox.com> References: <200410081335.37325.sebastian@sslota.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200410081335.37325.sebastian@sslota.de> To: Sebastian Slota Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Sebastian Slota wrote: > libata version 1.02 loaded. > sata_sil version 0.54 > ACPI: PCI interrupt 0000:03:03.0[A] -> GSI 19 (level, low) -> IRQ 19 > ata1: SATA max UDMA/100 cmd 0xF8B09080 ctl 0xF8B0908A bmdma 0xF8B09000 irq 19 > ata2: SATA max UDMA/100 cmd 0xF8B090C0 ctl 0xF8B090CA bmdma 0xF8B09008 irq 19 > ata3: SATA max UDMA/100 cmd 0xF8B09280 ctl 0xF8B0928A bmdma 0xF8B09200 irq 19 > ata4: SATA max UDMA/100 cmd 0xF8B092C0 ctl 0xF8B092CA bmdma 0xF8B09208 irq 19 > ata1: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003 > 88:207f > ata1: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48 > ata1(0): applying Seagate errata fix > ata1: dev 0 configured for UDMA/100 > scsi0 : sata_sil > ata2: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003 > 88:207f > ata2: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48 > ata2(0): applying Seagate errata fix > ata2: dev 0 configured for UDMA/100 > scsi1 : sata_sil > ata3: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003 > 88:207f > ata3: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48 > ata3(0): applying Seagate errata fix > ata3: dev 0 configured for UDMA/100 > scsi2 : sata_sil > ata4: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003 > 88:207f > ata4: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48 > ata4(0): applying Seagate errata fix > ata4: dev 0 configured for UDMA/100 The "applying Seagate errata fix" locks each request to a small size, which kills performance basically. Jeff