Copyright (c) 2000 Jeroen Ruigrok van der Werven
Copyright (c) 2000,2001 S�ren Schmidt
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
$FreeBSD: head/share/man/man4/ata.4 74831 2001-03-26 19:49:39Z sos $
.Dd January 27, 2000 .Dt ATA 4 .Os FreeBSD .Sh NAME .Nm ata , .Nm acd , .Nm ad , .Nm afd , .Nm ast .Nd Generic ATA/ATAPI disk controller driver .Sh SYNOPSIS For ISA based ATA/ATAPI support: .Cd device isa .Cd device ata0 at isa? port IO_WD1 irq 14 .Cd device ata1 at isa? port IO_WD2 irq 15
p For PCI based ATA/ATAPI support: .Cd device pci .Cd device ata
p To support ATA compliant disk drives: .Cd device atadisk
p To support ATAPI CD-ROM, CDR, CDRW, DVD-ROM and DVD-RAM drives: .Cd device atapicd
p To support ATAPI floppy drives, such as the ZIP and LS120: .Cd device atapifd
p To support ATAPI tape drives: .Cd device atapist
p The following tunables are setable from the loader: l -ohang t Va hw.ata.ata_dma set to 1 for DMA access 0 for PIO (default is DMA). t Va hw.ata.atapi_dma set to 1 for DMA access 0 for PIO (default is PIO). t Va hw.ata.wc set to 1 to enable Write Caching (default is disabled) (WARNING might cause data loss on power failures) t Va hw.ata.tags set to 1 to enable Tagged Queuing support (default is disabled) (only IBM DPTA and DTLA drives support that) .El .Sh DESCRIPTION This driver provides access to disk drives, ATAPI CD-ROM and DVD drives, ZIP drives and tape streamers connected to controllers according to the ATA and ATAPI standards. These devices are also commonly known as IDE or EIDE devices.
p The currently supported controllers with their maximum speed include:
p l -tag -width "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx" -compact t Acerlabs Aladdin Ultra DMA 33 (UDMA2), 33 MB/sec t AMD 756 Ultra DMA 66 (UDMA4), 66 MB/sec t CMD 646 DMA 2 (WDMA2), 16 MB/sec t CMD 648 Ultra DMA 66 (UDMA4), 66 MB/sec t CMD 649 Ultra DMA 100 (UDMA5), 100 MB/sec t Cypress 82C693 DMA 2 (WDMA2), 16 MB/sec t HighPoint HPT366 Ultra DMA 66 (UDMA4), 66 MB/sec t HighPoint HPT370 Ultra DMA 100 (UDMA5), 100 MB/sec t Intel PIIX DMA 2 (WDMA2), 16 MB/sec t Intel PIIX3 DMA 2 (WDMA2), 16 MB/sec t Intel PIIX4 Ultra DMA 33 (UDMA2), 33 MB/sec t Intel ICH0 Ultra DMA 33 (UDMA2), 33 MB/sec t Intel ICH Ultra DMA 66 (UDMA4), 66 MB/sec t Intel ICH2 Ultra DMA 100 (UDMA5), 100 MB/sec t Promise Ultra/Fasttrak-33 Ultra DMA 33 (UDMA2), 33 MB/sec t Promise Ultra/Fasttrak-66 Ultra DMA 66 (UDMA4), 66 MB/sec t Promise Ultra/Fasttrak-100 Ultra DMA 100 (UDMA5), 100 MB/sec t ServerWorks ROSB4 Ultra DMA 33 (UDMA2), 33 MB/sec t SiS 5591 Ultra DMA 33 (UDMA2), 33 MB/sec t Cyrix 5530 Ultra DMA 33 (UDMA2), 33 MB/sec t VIA 82C586 Ultra DMA 33 (UDMA2), 33 MB/sec t VIA 82C686a Ultra DMA 66 (UDMA4), 66 MB/sec t VIA 82C686b Ultra DMA 100 (UDMA5), 100 MB/sec .El
p All unknown chipsets can be supported at the maximum speed of 16 MB/sec.
p The .Nm driver also allows for changes to the transfer mode of the devices at a later time when the system is up and running, see .Xr atacontrol 8 .
p The driver attempts to set the maximum performance transfer mode on your disk drives by selecting the highest possible DMA mode. ATAPI devices are left in PIO mode because DMA problems are common despite the device specifications. You can always try to set DMA mode on an ATAPI device using .Xr atacontrol 8 , but be aware that your hardware might .Em not support it and can .Em hang the system. .Sh FILES l -tag -width "/sys/i386/conf/GENERIC " -compact t Pa /dev/ad* ATA disk device nodes t Pa /dev/acd* ATAPI CD-ROM device nodes t Pa /dev/afd* ATAPI floppy drive device nodes t Pa /dev/ast* ATAPI tape drive device nodes t Pa /sys/i386/conf/GENERIC sample generic kernel config file for .Nm based systems .El .Sh NOTES Static numbering (enabled with the .Dv ATA_STATIC_ID kernel option) reserves a number for each possibly connected disk, even when not present. This may result in odd situations where, for example, ad0 and ad2 exist in the absence of ad1. The advantage is that the addition of the formerly absent drive does not cause the numbers of the other drives to change.
p The .Nm driver does not support MFM/RLL/ESDI (ST-506) style disks.
p Remember that in order to use UDMA4 (and above) mode you .Em have to use a special 80 conductor cable, and the driver tries to determine if you have such a cable attached before setting UDMA4 mode.
p The use of UDMA4(66MHz) and higher together with non-UDMA4 devices on the same ATA channel is not recommended, unless they are run at the non-UDMA4 device's lower speed. The driver has been designed to handle that kind of setup but lots of older devices do not like this. .Sh SEE ALSO .Xr atacontrol 8 .Xr burncd 8 .Sh HISTORY The .Nm driver first appeared in .Fx 4.0 . .Sh AUTHORS .An -nosplit The .Nm driver was written by .An S\(/oren Schmidt .Aq sos@FreeBSD.org .
p This manual page was written by .An Jeroen Ruigrok van der Werven .Aq asmodai@FreeBSD.org and .An S\(/oren Schmidt .Aq sos@FreeBSD.org .