ATA(4) BSD Kernel Interfaces Manual ATA(4)NAMEata — deprecated (S)ATA/ATAPI disk controller driver
SYNOPSIS
For ISA based ATA/ATAPI support:
device isa
device ata0 at isa? port IO_WD1 irq 14
device ata1 at isa? port IO_WD2 irq 15
For PCI based (S)ATA/ATAPI support:
device pci
device ata
To support (S)ATA compliant disk drives:
device atadisk
To support ATAPI CD-ROM, CDR, CDRW, DVD-ROM and DVD-RAM drives:
device atapicd
To support ATAPI floppy drives, such as the ZIP and LS120:
device atapifd
To support ATAPI tape drives:
device atapist
The following tunables are settable from the loader:
hw.ata.ata_dma
set to 1 for DMA access, 0 for PIO (default is DMA).
hw.ata.atapi_dma
set to 1 for DMA access, 0 for PIO (default is PIO).
hw.ata.wc
set to 1 to enable Write Caching, 0 to disable (default is enabled).
(WARNING: might cause data loss on power failures.)
hw.ata.tags
set to 1 to enable Tagged Queuing support, 0 to disable (default is dis‐
abled). (Only IBM DPTA, DTLA, ICxxxxxxAT, ICxxxxxxAV drives support
that.)
DESCRIPTION
The ata driver is the deprecated FreeBSD 4.8 ATA driver. DragonFly's
default ATA driver is nata(4) which was ported from newer FreeBSD code.
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.
The currently supported ATA controllers with their maximum speed include:
Acerlabs Aladdin Ultra DMA 100 (UDMA5), 100 MB/sec
(depending on model, max stated at
boot)
AMD 756 Ultra DMA 66 (UDMA4), 66 MB/sec
AMD 766 Ultra DMA 100 (UDMA5), 100 MB/sec
AMD 768 Ultra DMA 100 (UDMA5), 100 MB/sec
AMD 8111 Ultra DMA 133 (UDMA6), 133 MB/sec
Cenatek Rocket Drive Ultra DMA 133 (UDMA6), 133 MB/sec
CMD 646 DMA 2 (WDMA2), 16 MB/sec
CMD 648 Ultra DMA 66 (UDMA4), 66 MB/sec
CMD 649 Ultra DMA 100 (UDMA5), 100 MB/sec
Cypress 82C693 DMA 2 (WDMA2), 16 MB/sec
Cyrix 5530 Ultra DMA 33 (UDMA2), 33 MB/sec
HighPoint HPT366 Ultra DMA 66 (UDMA4), 66 MB/sec
HighPoint HPT370 Ultra DMA 100 (UDMA5), 100 MB/sec
HighPoint HPT372/HPT374 Ultra DMA 133 (UDMA6), 133 MB/sec
Intel PIIX/PIIX3 DMA 2 (WDMA2), 16 MB/sec
Intel PIIX4 Ultra DMA 33 (UDMA2), 33 MB/sec
Intel ICH0 Ultra DMA 33 (UDMA2), 33 MB/sec
Intel ICH Ultra DMA 66 (UDMA4), 66 MB/sec
Intel ICH2/ICH3/ICH4/ICH5 Ultra DMA 100 (UDMA5), 100 MB/sec
Intel ICH6R/RW Ultra DMA 100 (UDMA5), 100 MB/sec
NVIDIA nForce ATA100 Ultra DMA 100 (UDMA5), 100 MB/sec
NVIDIA nForce2/nForce3 ATA133 Ultra DMA 133 (UDMA6), 133 MB/sec
Promise Ultra/Fasttrak-33 Ultra DMA 33 (UDMA2), 33 MB/sec
Promise Ultra/Fasttrak-66 Ultra DMA 66 (UDMA4), 66 MB/sec
Promise Ultra/Fasttrak-100 (TX2/TX4) Ultra DMA 100 (UDMA5), 100 MB/sec
Promise Ultra/Fasttrak-133 TX2/TX2000 Ultra DMA 133 (UDMA6), 133 MB/sec
ServerWorks ROSB4 Ultra DMA 33 (UDMA2), 33 MB/sec
ServerWorks CSB5 Ultra DMA 100 (UDMA5), 100 MB/sec
(depending on model, max stated at
boot)
SiI 0680 Ultra DMA 133 (UDMA6), 133 MB/sec
(depending on model, max stated at
boot)
SiS 5591 Ultra DMA 133 (UDMA5), 133 MB/sec
(depending on model, max stated at
boot)
VIA 82C586 Ultra DMA 33 (UDMA2), 33 MB/sec
VIA 82C596 Ultra DMA 66 (UDMA4), 66 MB/sec
(depending on model, max stated at
boot)
VIA 82C686a Ultra DMA 66 (UDMA4), 66 MB/sec
VIA 82C686b Ultra DMA 100 (UDMA5), 100 MB/sec
VIA 8233/8235/8237 Ultra DMA 133 (UDMA6), 133 MB/sec
(depending on model, max stated at
boot)
The currently supported SATA controllers with their maximum speed
include:
Intel ICH5 Serial ATA 150, 150 MB/sec
Intel ICH6(R)/(R)W Serial ATA 150, 150 MB/sec
SiI 3112/3114/3124/3512 Serial ATA 150, 150 MB/sec
VIA 8237 Serial ATA 150, 150 MB/sec
All unknown chipsets are supported at the maximum speed of 16 MB/sec.
The ata driver also allows for changes to the transfer mode of the
devices at a later time when the system is up and running, see
atacontrol(8).
The driver attempts to set the maximum performance transfer mode on your
disk drives by selecting the highest possible DMA mode. However the ata
driver sometimes issue the message "DMA limited to UDMA33, non-ATA66
cable or device", if the cable is ATA66 (or above) compliant, it is
because the other device on this channel states it can only accept up to
UDMA2/ATA33 signals. 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 atacontrol(8), but be aware
that your hardware might not support it and can hang the system.
FILES
/dev/ad* ATA disk device nodes
/dev/acd* ATAPI CD-ROM device nodes
/dev/afd* ATAPI floppy drive device nodes
/dev/ast* ATAPI tape drive device nodes
NOTES
Static numbering (enabled with the 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.
The ata driver does not support MFM/RLL/ESDI (ST-506) style disks.
Remember that in order to use UDMA4 (and above) mode you 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.
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.
SEE ALSOnata(4), atacontrol(8), burncd(8)HISTORY
The ata driver first appeared in FreeBSD 4.0.
AUTHORS
The ata driver was written by Søren Schmidt ⟨sos@FreeBSD.org⟩.
This manual page was written by Jeroen Ruigrok van der Werven
⟨asmodai@FreeBSD.org⟩ and Søren Schmidt ⟨sos@FreeBSD.org⟩.
BSD June 15, 2007 BSD