1.\" 2.\" Copyright (c) 2000 Jeroen Ruigrok van der Werven 3.\" Copyright (c) 2000 S�ren Schmidt 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" 29.Dd January 27, 2000 30.Dt ATA 4 31.Os FreeBSD 4.0 32.Sh NAME 33.Nm ata 34.Nd 35Generic ATA/ATAPI disk controller driver 36.Sh SYNOPSIS 37For ISA based ATA/ATAPI support: 38.Cd device isa 39.Cd device ata0 at isa? port IO_WD1 irq 14 40.Cd device ata1 at isa? port IO_WD2 irq 15 41.Pp 42For PCI based ATA/ATAPI support: 43.Cd device pci 44.Cd device ata 45.Pp 46To support ATA compliant disk drives: 47.Cd device atadisk 48.Pp 49To support ATAPI CD-ROM, CDR, CDRW or DVD drives: 50.Cd device atapicd 51.Pp 52To support ATAPI floppy drives, 53such as the ZIP and LS120: 54.Cd device atapifd 55.Pp 56To support ATAPI tape drives: 57.Cd device atapist 58.Pp 59To set the controller numbering to static, 60just like the 61.Xr wd 4 62driver: 63.Cd options ATA_STATIC_ID 64.Pp 65To enable DMA on an ATAPI device: 66.Cd options ATA_ENABLE_ATAPI_DMA 67.Sh DESCRIPTION 68This driver provides access to disk drives, CD-ROM drives, 69ZIP drives and tape streamers connected to controllers 70according to the ATA and ATAPI standards. 71These devices are also commonly known as IDE or EIDE devices. 72.Pp 73The currently supported controllers with their maximum speed include: 74.Pp 75.Bl -tag -width "Promise Fasttrak-33 " -compact 76.It Acerlabs Aladdin 77Ultra DMA 33 (UDMA2), 33 MB/sec 78.It AMD 756 79Ultra DMA 66 (UDMA4), 66 MB/sec 80.It HighPoint HPT366 81Ultra DMA 66 (UDMA4), 66 MB/sec 82.It Intel PIIX 83DMA 2 (WDMA2), 16 MB/sec 84.It Intel PIIX3 85DMA 2 (WDMA2), 16 MB/sec 86.It Intel PIIX4 87Ultra DMA 33 (UDMA2), 33 MB/sec 88.It Intel ICH 89Ultra DMA 33 (UDMA2), 33 MB/sec 90.It Promise Fasttrak-33 91Ultra DMA 33 (UDMA2), 33 MB/sec 92.It Promise Fasttrak-66 93Ultra DMA 66 (UDMA4), 66 MB/sec 94.It Promise Ultra-33 95Ultra DMA 33 (UDMA2), 33 MB/sec 96.It Promise Ultra-66 97Ultra DMA 66 (UDMA4), 66 MB/sec 98.It SiS 5591 99Ultra DMA 33 (UDMA2), 33 MB/sec 100.It VIA 82C586 101Ultra DMA 33 (UDMA2), 33 MB/sec 102.It VIA 82C686 103Ultra DMA 66 (UDMA4), 66 MB/sec 104.El 105.Pp 106All unknown chipsets can be supported at the maximum speed of 16 MB/sec. 107.Pp 108The ata driver also allows for changes to the transfer mode of the devices 109at a later time when the system is up and running. 110.Pp 111The driver attempts to set the maximum performance transfer mode on your disk 112drives by selecting the highest possible DMA mode. 113ATAPI devices are left in PIO mode because DMA problems are common despite the 114device specifications. 115You can always try to set DMA mode on an ATAPI device using the sysctl 116method described here, 117but be aware that your hardware might 118.Em not 119support it and can 120.Em hang 121the system. 122.Pp 123To see the devices' current access modes, use the command line: 124.Pp 125.Dl sysctl hw.atamodes 126.Pp 127which results in the modes of the devices being displayed as a string 128like this: 129.Pp 130.Dl hw.atamodes: dma,pio,---,pio,dma,---,dma,---, (--- = no device) 131.Pp 132This means that ata0-master is in DMA mode, 133ata0-slave is in PIO mode, 134and so forth. 135You can set the mode with sysctl -w and a string like the above, 136for example: 137.Pp 138.Dl sysctl -w hw.atamodes=pio,pio,---,dma,pio,---,dma,---, 139.Pp 140The new modes are set as soon as the sysctl command returns. 141.Pp 142.Sh FILES 143.Bl -tag -width "/sys/i386/conf/GENERIC " -compact 144.It Pa /dev/ad* 145ATA disk device nodes 146.It Pa /dev/acd* 147ATAPI CD-ROM device nodes 148.It Pa /dev/afd* 149ATAPI floppy drive device nodes 150.It Pa /dev/ast* 151ATAPI tape drive device nodes 152.It Pa /sys/i386/conf/GENERIC 153sample generic kernel config file for ata based systems 154.El 155.Sh NOTES 156The ata driver does not support MFM/RLL/ESDI (ST-506) style disks. 157.Pp 158Remember that in order to use UDMA4 mode you 159.Em have 160to use a special 80 conductor cable, 161and the driver tries to determine if you have such a cable 162attached before setting UDMA4 mode. 163.Pp 164The use of UDMA4(66MHz) and non-UDMA4 devices on the same ATA channel is not 165recommended, 166unless they are run at the non-UDMA4 device's lower speed. 167The driver has been designed to handle this but some older devices do 168not like this. 169.Sh AUTHORS 170The ata driver was written by 171.An S�ren Schmidt 172.Aq sos@freebsd.org . 173.Pp 174This manual page was written by 175.An Jeroen Ruigrok van der Werven 176.Aq asmodai@freebsd.org 177and 178.An S�ren Schmidt 179.Aq sos@freebsd.org . 180